SILICON-BASED ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY AND PREPARATION METHOD THEREOF

Disclosed is a silicon-based anode active material for a lithium secondary battery. The silicon-based anode active material imparts high capacity and high power to the lithium secondary battery, can be used for a long time, and has good thermal stability. Also disclosed is a method for preparing the silicon-based anode active material. The method includes (A) binding metal oxide particles to the entire surface of silicon particles or portions thereof to form a silicon-metal oxide composite, (B) coating the surface of the silicon-metal oxide composite with a polymeric material to form a silicon-metal oxide-polymeric material composite, and (C) heat treating the silicon-metal oxide-polymeric material composite under an inert gas atmosphere to convert the coated polymeric material layer into a carbon coating layer.

CATHODE ACTIVE MATERIAL COATED WITH FLUORINE-DOPED LITHIUM METAL MANGANESE OXIDE AND LITHIUM-ION SECONDARY BATTERY COMPRISING THE SAME

Provided are a cathode active material coated with a fluorine-doped spinel-structured lithium metal manganese oxide, a lithium secondary battery including the same, and a method for preparing the same. The cathode active material has improved chemical stability and provides improved charge/discharge characteristics at elevated temperature (55-60° C.) and high rate. The cathode active material allows lithium ions to pass through the coating layer with ease and is chemically stable, and thus may be used effectively as a cathode active material for a high-power lithium secondary battery. 1. A cathode active material having a core-shell structure , wherein the shell is a coating layer of fluorine-doped spinel-structured lithium metal manganese oxide represented by the following Chemical Formula 1:{'br': None, 'sub': 1', 'x', '2-x', '4-n', 'n, 'LiMMnOF\u2003\u2003[Chemical Formula 1]'}{'sub': 1', '4, 'wherein x is /(−z), z is an oxidation number of M, and n is a real number satisfying 0 Подробнее

FURNACE FOR TRANSMISSION MODE X-RAY DIFFRACTOMETER AND TRANSMISSION MODE X-RAY DIFFRACTOMETER USING THEREOF

Provided is a furnace for a transmission mode X-ray diffractometer and a transmission mode X-ray diffractometer using the same. The furnace for a transmission mode X-ray diffractometer includes a sample heating unit disposed adjacent to a quartz capillary accommodating a sample to heat the sample, and a main body disposed to surround the quartz capillary and the sample heating unit and having an insulating function for allowing the heated sample to maintain a thermal equilibrium state. 1. A furnace for a transmission mode X-ray diffractometer , comprising:a sample heating unit disposed adjacent to a quartz capillary accommodating a sample to heat the sample; anda main body disposed to surround the quartz capillary and the sample heating unit and having an insulating function for allowing the heated sample to maintain a thermal equilibrium state.2. The furnace for a transmission mode X-ray diffractometer according to claim 1 , wherein the main body includes:a first through hole into which an X-ray is input; anda second through hole provided to face the first through hole with the quartz capillary being interposed therebetween, so that the X-ray passing through the sample and diffracted by the sample is emitted from the second through hole.3. The furnace for a transmission mode X-ray diffractometer according to claim 2 ,wherein the second through hole is tapered according to a diffraction angle of the X-ray to have a diameter gradually increasing from an inlet at which the X-ray is input toward an outlet at which the X-ray is diffracted and emitted, so that the X-ray passing through the sample is not interfered.4. The furnace for a transmission mode X-ray diffractometer according to claim 1 ,wherein the sample heating unit includes a heating coil disposed adjacent to the quartz capillary to surround the quartz capillary.5. The furnace for a transmission mode X-ray diffractometer according to claim 4 ,wherein the sample heating unit further includes an insulating ...

GEL POLYMER ELECTROLYTE AND SECONDARY BATTERY COMPRISING THE SAME

Provided are a gel polymer electrolyte and a secondary battery including the same. More particularly, the gel polymer electrolyte includes a sodium cation-containing polymer from which sodium cations can be dissociated, and thus provides improved ion conductivity of sodium cations, thereby improving the electrochemical properties of a secondary battery. 1. A gel polymer electrolyte for a secondary battery , comprising: (A) a polymer matrix comprising (a1) a sodium cation-containing polymer and (a2) a fluoropolymer; and (B) an organic liquid electrolyte uptaken in the polymer matrix.2. The gel polymer electrolyte for a secondary battery according to claim 1 , wherein (a1) claim 1 , the sodium cation-containing polymer is poly(sodium 4-styrenesulfonate).3. The gel polymer electrolyte for a secondary battery according to claim 1 , wherein (a2) claim 1 , the fluoropolymer is selected from poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-co-HFP) claim 1 , poly(vinylidene fluoride) (PVdF) claim 1 , polytetrafluoroethylene (PTFE) claim 1 , fluorinated ethylene propylene (FEP) claim 1 , perfluoroalkoxyalkane (PFA) claim 1 , and a mixture thereof.4. The gel polymer electrolyte for a secondary battery according to claim 1 , wherein (a1) claim 1 , the sodium cation-containing polymer claim 1 , and (a2) claim 1 , the fluoropolymer are present in the polymer matrix in an amount of 1-60 wt % and 40-99 wt % claim 1 , respectively claim 1 , based on the total weight of the polymer matrix.5. The gel polymer electrolyte for a secondary battery according to claim 1 , wherein the polymer matrix is porous.6. The gel polymer electrolyte for a secondary battery according to claim 1 , wherein the polymer matrix is obtained by removing (a3) a pore-forming plasticizer from a composite polymer in which (a1) a sodium cation-containing polymer claim 1 , (a2) a fluoropolymer and (a3) the pore-forming plasticizer are contained homogeneously.7. The gel polymer electrolyte for a secondary ...

RECOVERY AND SYNTHESIS METHOD FOR METALOXIDIC CATHODIC ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY

Disclosed are a recovery for a metaloxidic cathodic active material for a lithium ion secondary battery and a synthesis thereof by the recovery method, wherein the recovery method includes (a) dissolving a cathodic active material from a waste lithium ion secondary battery using sulfuric acid solution containing sulfurous acid gas to generate a solution containing metal ions, (b) injecting sodium hydroxide solution and ammonia solution in the solution containing the metal ions to fabricate an electrode active material precursor, and (c) filtrating the active material precursor, followed by drying and grinding, thus to fabricate a solid-state cathodic active material precursor, and the synthesis method is achieved by mixing the electrode active material precursor fabricated according to the recovery method with lithium carbonate or lithium hydroxide, followed by heat treatment, to generate a metaloxidic cathodic active material. 1. A method for recovering metaloxidic cathodic active material for a lithium ion secondary battery comprising:(a) dissolving a cathodic active material from a waste lithium ion secondary battery using sulfuric acid solution containing sulfurous acid gas to generate a solution containing metal ions; and(b) injecting sodium hydroxide solution and ammonia solution in the solution containing the metal ions to fabricate an electrode active material precursor.2. The method of claim 1 , further comprising (c) filtrating the active material precursor claim 1 , followed by drying and grinding claim 1 , thus to fabricate a solid-state cathodic active material precursor.3. A method for synthesizing metaloxidic cathodic active material for a lithium ion secondary battery characterized by mixing the electrode active material precursor fabricated according to with lithium carbonate or lithium hydroxide claim 1 , followed by heat treatment claim 1 , to generate a metaloxidic cathodic active material.4. The method of claim 1 , wherein the concentration of ...

SYNTHESIZING METHOD FOR LITHIUM TITANIUM OXIDE NANOPARTICLE USING SUPERCRITICAL FLUIDS

A method for synthesizing lithium titanium oxide-based anode active material nanoparticles, and more particularly, a method for synthesizing lithium titanium oxide-based anode active material nanoparticles using a supercritical fluid condition is disclosed herein. The method may include (a) preparing a lithium precursor solution and a titanium precursor solution, (b) forming lithium titanium oxide-based anode active material nanoparticles by introducing the lithium precursor solution and titanium precursor solution into an reactor at a supercritical fluid condition, and (c) cleaning and drying the nanoparticles, and may further include (d) calcinating the nanoparticles at 500-1000° C. for 10 minutes to 24 hours after the step (c). 1. A method of synthesizing lithium titanium oxide-based anode active material nanoparticles , the method comprising:(a) preparing a lithium precursor solution and a titanium precursor solution;(b) forming lithium titanium oxide-based anode active material nanoparticles by introducing the lithium precursor solution and titanium precursor solution into an reactor at a supercritical fluid condition; and(c) cleaning and drying the nanoparticles.2. The method of claim 1 , wherein the step (b) is:(b-1) forming lithium titanium oxide-based anode active material nanoparticles and crystallizing the nanoparticles by introducing the lithium precursor solution and titanium precursor solution into a batch-type reactor and mixing them the supercritical fluid condition; or(b-2) forming lithium titanium oxide-based anode active material nanoparticles and crystallizing the nanoparticles by introducing the lithium precursor solution and titanium precursor solution into a continuous-type reactor maintaining the supercritical fluid condition.3. The method of claim 1 , wherein the lithium titanium oxide-based anode active material nanoparticles are anode active material nanoparticles claim 1 , represented by LiTiO claim 1 , having a spinel structure4. The ...

ELECTRODE COATED WITH METAL DOPED CARBON FILM

Disclosed is an electrode coated with a metal-doped carbon film. 1. An electrode coated with a metal-doped carbon film , wherein the electrode comprises a electrode active material selected from the group consisting of LiNiO , LiNiCoO , VO , VOand MnO.23-. (canceled)4. The electrode according to claim 1 , wherein the electrode further comprises a conductor selected from the group consisting of acetylene black claim 1 , carbon black claim 1 , graphite and a mixture thereof.5. The electrode according to claim 1 , wherein the electrode further comprises a binder selected from the group consisting of vinylidene fluoride-hexafluoropropylene copolymer claim 1 , polyvinylidene fluoride claim 1 , polyacrylonitrile claim 1 , poly(methyl methacrylate) claim 1 , polyamide and a mixture thereof.6. The electrode according to claim 1 , wherein the thickness of the metal-doped carbon film is 100-300 nm.7. The electrode according to claim 1 , wherein the metal-doped carbon film has a cluster size of 10-30 nm.8. The electrode according to claim 1 , wherein the carbon film is prepared from fullerene.9. The electrode according to claim 1 , wherein the metal doped in the carbon film is one or more metal selected from a group consisting of tin claim 1 , zinc claim 1 , silver claim 1 , aluminum and gallium.10. The electrode according to claim 1 , wherein the metal is doped in an amount of 0.8-3.6 wt % based on the weight of the metal-doped carbon film.11. A method for preparing an electrode coated with a metal-doped carbon film claim 1 , comprising providing an electrode claim 1 , a carbon precursor and a dopant metal precursor under plasma condition.12. The method for preparing an electrode coated with a metal-doped carbon film according to claim 11 , wherein the plasma is a plasma of 200-300 W and 10-30 A.1310. A lithium secondary battery comprising the electrode according to any one of and to .14. An electrode coated with a metal-doped carbon film claim 11 , wherein the electrode ...

METHOD OF PREPARING CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERIES AND LITHIUM SECONDARY BATTERIES USING THE SAME

Disclosed is a method for preparing a cathode active material represented by LiMSiO(M=transition metal) for a lithium secondary battery using microwaves, including: 1) dispersing a silicon compound in a solvent; 2) mixing a lithium salt and a transition metal salt in the resulting dispersion and then adding a chelating agent to form complex ions: and 3) treating the mixture with microwaves for gelation. The prepared cathode active material represented by LiMSiO(M=transition metal) for a lithium secondary battery has homogeneous composition and superior characteristics. Further, since the preparation process is simple, the production efficiency is good. 1. A method for preparing a cathode active material represented by LiMSiO(M=transition metal) for a lithium secondary battery using microwaves , comprising:dispersing a silicon compound in a solvent;mixing a lithium salt and a transition metal salt in the resulting dispersion and then adding a chelating agent to form complex ions: andtreating the mixture with microwaves for gelation.2. The method for preparing a cathode active material for a lithium secondary battery according to claim 1 , wherein the transition metal M is selected from Mn claim 1 , Fe claim 1 , Co claim 1 , Ni claim 1 , Ti claim 1 , V claim 1 , Cr or a mixture thereof.3. The method for preparing a cathode active material for a lithium secondary battery according to claim 1 , wherein the silicon compound is selected from silica claim 1 , silica tetraacetate claim 1 , sodium silicate or a mixture thereof.4. The method for preparing a cathode active material for a lithium secondary battery according to claim 1 , wherein the lithium salt compound is selected from lithium acetate claim 1 , lithium chloride claim 1 , lithium nitrate claim 1 , lithium iodide or a mixture thereof.5. The method for preparing a cathode active material for a lithium secondary battery according to claim 1 , wherein the transition metal salt is selected from manganese acetate ...

ASYMMETRIC HYBRID LITHIUM SECONDARY BATTERY HAVING BUNDLE TYPE SILICON NANO-ROD

Disclosed are a metallic nano-structure material in which an energy storage capacity based on electrochemical reaction with lithium is improved by 10 times or more compared to a conventional graphite material and power characteristics are excellent, an electrode composed of the metallic nano-structure material, and a lithium ion asymmetric secondary battery including the electrode as an anode. When using the electrode for the lithium ion asymmetric secondary battery, energy larger than with the graphite material can be stored with very thin thickness due to the high-capacity feature of the metallic material and the high-power feature can be achieved by the nano structure, such that energy density can be innovatively improved in the same weight condition when compared to a conventional lithium ion capacitor, and the lithium ion asymmetric secondary battery including the electrode can be used for renewable energy storage, ubiquitous power supply, heavy machinery, vehicle power source, etc. 1. An asymmetric hybrid lithium ion battery comprising a cathode which is an activated carbon and an anode which is silicon alloyed with lithium.2. The asymmetric hybrid lithium ion battery of claim 1 , wherein the silicon alloyed with lithium is bundle type silicon nano-rod or phosphorus-doped bundle type silicon nano-rod having a column structure.3. The asymmetric hybrid lithium ion battery of claim 2 , wherein the silicon having the column structure has an equivalent diameter of about 50-100 nm and a height thereof is about 500-5000 nm.4. The asymmetric hybrid lithium ion battery of claim 2 , wherein the phosphorus-doped silicon is doped with phosphorus using electron cyclotron resonance and chemical vapor deposition.5. The asymmetric hybrid lithium ion battery of claim 2 , wherein the amount of doped phosphorus in the phosphorus-doped silicon is about 0.1-10 wt % relative to a total doped-silicon electrode.6. The asymmetric hybrid lithium ion battery of claim 2 , wherein the ...

METHOD OF FABRICATING CATHODE FOR LITHIUM ION SECONDARY BATTERY BY RECYCLING CATHODE ACTIVE MATERIAL AND LITHIUM ION SECONDARY BATTERY FABRICATED THEREBY

The present invention relates to a method for fabricating a cathode for a lithium ion secondary battery by recycling an active material, and a lithium ion secondary battery including a cathode fabricated thereby. The method according to the present invention includes: carbonizing a binder existing in a cathode scrap of a lithium ion secondary battery by heat treating the cathode scrap of the lithium ion secondary battery; collecting a cathode active material from the cathode scrap of the lithium ion secondary battery; and forming a cathode for a lithium ion secondary battery without adding a conductive material to the collected cathode active material. According to the present invention, a lithium ion secondary battery which is environmentally friendly, economical, and capable of reducing manufacturing cost can be implemented. 1. A method for fabricating a cathode for a lithium ion secondary battery by recycling a cathode active material , the method comprising:carbonizing a binder existing in a cathode scrap of a lithium ion secondary battery by heat treating the cathode scrap of the lithium ion secondary battery;collecting a cathode active material from the cathode scrap of the lithium ion secondary battery; andforming a cathode for a lithium ion secondary battery without adding a conductive material to the collected cathode active material.2. The method of claim 1 , wherein the cathode for the lithium ion secondary battery for the carbonizing of the binder comprises a conductive thin plate and a cathode active material layer formed on the conductive thin plate claim 1 , and the cathode active material layer comprises the cathode active material claim 1 , conductive material claim 1 , and binder.3. The method of claim 2 , wherein the conductive thin plate is a conductive metal thin plate.4. The method of claim 3 , wherein the conductive metal thin plate comprises at least one selected from the group consisting of an aluminum thin plate claim 3 , a copper thin ...

METHOD OF PRODUCING NANOCOMPOSITE CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY

Disclosed is a method of producing a nanocomposite cathode active material for a lithium secondary battery, represented by the following formula: 1. A method of producing a nanocomposite cathode active material for a lithium secondary battery , represented by the following formula:{'br': None, 'i': x', 'x, 'sub': 2', '3', '2, 'LiMnO—(1−)LiMO'}{'sub': a', 'b', 'c, 'wherein M is Ni—Mn—Co, x is a decimal number from 0.1 to 0.9, and a, b and c are independently a decimal number from 0.05 to 0.9, with the proviso that the sum of a, b and c is equal to 1, the method comprising'}{'sub': 2', '3, '(a) mixing a lithium compound with a manganese compound, and heat treating the mixture to prepare LiMnOas a first cathode active material,'}{'sub': a', 'b', 'c', '2, '(b) mixing a mixed solution of nickel sulfate/manganese sulfate/cobalt sulfate, a sodium hydroxide solution and aqueous ammonia to prepare a coprecipitated hydroxide represented by (Ni—Mn—Co)(OH)where a, b and c are as defined above,'}{'sub': '2', '(c) mixing the coprecipitated hydroxide with a lithium compound, and heat treating the mixture to prepare a second cathode active material represented by LiMOwhere M is as defined above, and'}(d) mixing the first cathode active material with the second cathode active material, and heat treating the mixture.2. The method according to claim 1 , wherein in step (a) claim 1 , at least one dopant selected from the group consisting of Mg claim 1 , Al claim 1 , Ca claim 1 , Ti claim 1 , V claim 1 , Cr claim 1 , Fe claim 1 , Cu claim 1 , Zn claim 1 , Ga claim 1 , Zr claim 1 , Mo claim 1 , Sn claim 1 , Sb claim 1 , W and Bi is added in an amount of 0.01 to 2% by mole claim 1 , based on the total moles of the first cathode active material.3. The method according to claim 1 , wherein in step (a) claim 1 , the heat treatment is performed at 400 to 900° C. for 3 to 24 hours.4. The method according to claim 1 , wherein in step (b) claim 1 , the molarity of the sodium hydroxide solution ...

METHOD FOR COATING CARBON ON LITHIUM TITANIUM OXIDE-BASED ANODE ACTIVE MATERIAL NANOPARTICLES AND CARBON-COATED LITHIUM TITANIUM OXIDE-BASED ANODE ACTIVE MATERIAL NANOPARTICLES PRODUCED BY THE METHOD

Disclosed is a method for carbon coating on lithium titanium oxide-based anode active material nanoparticles. The method includes (a) introducing a lithium precursor solution, a titanium precursor solution and a surface modifier solution into a reactor, and reacting the solutions under supercritical fluid conditions to prepare a solution including nanoparticles of an anode active material represented by LiTiO, (b) separating the anode active material nanoparticles from the reaction solution, and (c) calcining the anode active material nanoparticles to uniformly coat the surface of the nanoparticles with carbon. Further disclosed are carbon-coated lithium titanium oxide-based anode active material nanoparticles produced by the method. In the anode active material nanoparticles, lithium ions are transferred rapidly. In addition, the uniform carbon coating ensures high electrical conductivity, allowing the anode active material nanoparticles to have excellent electrochemical properties. 1. A method for carbon coating on lithium titanium oxide-based anode active material nanoparticles , the method comprising{'sub': 4', '5', '12, '(a) introducing a lithium precursor solution, a titanium precursor solution and a surface modifier solution into a reactor, and reacting the solutions under supercritical fluid conditions to prepare a solution comprising nanoparticles of an anode active material represented by LiTiO,'}(b) separating the anode active material nanoparticles from the solution prepared in (a), and(c) calcining the anode active material nanoparticles to coat the surface of the nanoparticles with carbon.2. The method according to claim 1 , wherein in step (a) claim 1 , the lithium precursor solution claim 1 , the titanium precursor solution and the surface modifier solution use alcohols as solvents and are allowed to react under supercritical alcohol conditions.3. The method according to claim 1 , wherein in step (a) claim 1 , the supercritical conditions are a ...

METHOD OF FABRICATING LiFePO4 CATHODE ELECTROACTIVE MATERIAL BY RECYCLING, AND LiFePO4 CATHODE ELECTROACTIVE MATERIAL, LiFePO4 CATHODE, AND LITHIUM SECONDARY BATTERY FABRICATED THEREBY

The present invention relates to a method for fabricating a LiFePO4 cathode electroactive material for a lithium secondary battery by recycling, and a LiFePO4 cathode electroactive material for a lithium secondary battery, a LiFePO4 cathode, and a lithium secondary battery fabricated thereby. The present invention is characterized in that a cathode scrap is heat treated in air for a cathode electroactive material to be easily dissolved in an acidic solution, and amorphous FePO 4 obtained as precipitate is heat treated in an atmosphere of air or hydrogen so as to fabricate crystalline FePO 4 or Fe 2 P 2 O 7 . According to the present invention, a cathode scrap may be recycled by using a simple, environmentally friendly, and economical method. Further, a lithium secondary battery fabricated by using a LiFePO 4 cathode electroactive material from the cathode scrap is not limited in terms of performance.

CATHODE ACTIVE MATERIALS FOR LITHIUM SECONDARY BATTERY AND PREPARATION METHOD THEREOF

Provided is a cathode active material for a lithium secondary battery and a method for preparing the same. The cathode active material for a lithium secondary battery allows a lithium secondary battery to realize high capacity and to maintain maximum capacity even at high voltage, prevents a drop in capacity during repeated charge/discharge cycles, and improves the lifespan of a lithium secondary battery. 1. A cathode active material for a lithium secondary battery , comprising LiXOcoated with LiMnO , wherein X is at least one metal selected from the group consisting of nickel (Ni) , cobalt (Co) , manganese (Mn) , aluminum (Al) , copper (Cu) , iron (Fe) , magnesium (Mg) , bismuth (Bi) and gallium (Ga).2. The cathode active material for a lithium secondary battery according to claim 1 , wherein LiXOis at least one selected from the group consisting of LiCoO claim 1 , LiNiO claim 1 , LiNixCoO(wherein 0 Подробнее

Recovery method of nickel from spent electroless nickel plating solutions by electrolysis

A recovery method of nickel according to the present invention comprises pretreatment step to prepare a solution for electrolysis by adding hexanesulfonate salt to a treatment solution including nickel, and nickel recovery step to recover nickel in a metal form by electrolysis of the above solution for electrolysis. The present invention can produce nickel in high purity with simple process with low cost, and can recover and reproduce nickel in a metal form with at least 99.5% of high purity and at least 90% of recovery rate.

NANOCOMPOSITE CATHODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERIES, METHOD FOR PREPARING THE SAME AND LITHIUM SECONDARY BATTERIES COMPRISING THE SAME

The present disclosure relates to a nanocomposite cathode active material for a lithium secondary battery, a method for preparing same, and a lithium secondary battery including same. More particularly, the present disclosure relates to a nanocomposite cathode active material for a lithium secondary battery including: a core including LiMnO; and LiMn(PO)distributed on the surface of the core. 1. A nanocomposite cathode active material for a lithium secondary battery comprising: a core comprising LiMnO; and LiMn(PO)distributed on the surface of the core.2. The nanocomposite cathode active material for a lithium secondary battery according to claim 1 , which comprises 0.01-0.1 mole of LiMn(PO)per 1 mole of LiMnO.3. A method for preparing a nanocomposite cathode active material for a lithium secondary battery claim 1 , comprising:adding a phosphate to a cathode active material precursor mixture;wet mixing the resulting mixture;drying and pulverizing the mixture; andheating and then cooling the pulverized mixture.4. The method for preparing a nanocomposite cathode active material for a lithium secondary battery according to claim 3 , wherein the cathode active material precursor mixture comprises a compound selected from a group consisting of MnO claim 3 , MnCO claim 3 , MnCOand a mixture thereof as a manganese precursor and a compound selected from a group consisting of LiCO claim 3 , CHCOOLi claim 3 , LiOH and a mixture thereof as a lithium precursor.5. The method for preparing a nanocomposite cathode active material for a lithium secondary battery according to claim 3 , wherein the phosphate is ammonium phosphate dibasic.6. The method for preparing a nanocomposite cathode active material for a lithium secondary battery according to claim 4 , wherein the manganese precursor is included in an amount of 190-200 moles and the lithium precursor is included in an amount of 100-110 moles claim 4 , per 1 mole of the phosphate.7. The method for preparing a nanocomposite ...

Lithium manganese borate-based cathode active material, lithium ion secondary battery including the same and method for preparing the same

Disclosed is a lithium manganese borate-based cathode active material. The cathode active material can be used to fabricate a lithium ion secondary battery that has advantages, such as high output capacity and cycle capacity, in comparison with lithium ion secondary batteries using conventional cathode active materials. Also disclosed are a lithium ion secondary battery including the cathode active material and a method for preparing the cathode active material.

ELECTROLYTE FOR MAGNESIUM RECHARGEABLE BATTERY AND PREPARATION METHOD THEREOF

Disclosed is an electrolyte solution for a magnesium rechargeable battery with a high ionic conductivity and a wide electrochemical window compared to the conventional electrolyte solution. The electrolyte solution is prepared by dissolving magnesium metal into the ethereal solution using combinations of metal chloride catalysts. The electrolyte solution can be applied to fabricate magnesium rechargeable batteries and magnesium hybrid batteries with a markedly increased reversible capacity, rate capability, and cycle life compared to those batteries employing the conventional electrolyte solution. Also disclosed is a method for preparing the electrolyte. 1. An electrolyte solution for a magnesium rechargeable battery made from the combination of metal chlorides , magnesium metal and an organic solvent.2. The electrolyte solution according to claim 1 , wherein the electrolyte solution is obtained by removing a solid fraction from a solution in which metal chlorides claim 1 , the magnesium metal claim 1 , and the magnesium ions are in equilibrium claim 1 , and collecting the remaining liquid fraction.3. The electrolyte solution according to claim 1 , wherein the metal chlorides are selected from AlClR(where n is an integer from 0 to 3 and R is selected from alkyl claim 1 , aryl claim 1 , heteroaryl claim 1 , and alkenyl groups) claim 1 , BClR(where n and R are as defined above) claim 1 , CrCl claim 1 , FeCl claim 1 , MnCl claim 1 , FeCl claim 1 , CoCl claim 1 , NiCl claim 1 , CuCl claim 1 , ZnCl claim 1 , TiCl claim 1 , ZrCl claim 1 , VCl claim 1 , NbCl claim 1 , RhCl claim 1 , and mixtures thereof.4. The electrolyte solution according to claim 1 , wherein the organic solvent is selected from tetrahydrofuran (THF) claim 1 , glyme claim 1 , diglyme claim 1 , triglyme claim 1 , tetraglyme claim 1 , dioxane claim 1 , anisole claim 1 , crown ethers claim 1 , polyethylene glycol claim 1 , acetonitrile claim 1 , propylene carbonate claim 1 , and mixtures thereof.5. The ...

Anode material for secondary battery,secondary battery including the anode material and method for preparing the anode material

Disclosed is an anode material for a sodium secondary battery. The anode material includes a tin fluoride-carbon composite composed of a tin fluoride and a carbonaceous material. The anode material can be used to improve the charge/discharge capacity, charge/discharge efficiency, and electrochemical activity of a sodium secondary battery. Also provided are a method for preparing the anode material and a sodium secondary battery including the anode material.

ELECTROLYTE FOR MAGNESIUM SECONDARY BATTERY AND PREPARATION METHOD THEREOF

Provided are an electrolyte for a magnesium secondary battery having improved ion conductivity and stability, and a method for preparing the same. The electrolyte for a magnesium secondary battery shows higher ion conductivity as compared to the electrolyte according to the related art, increases the dissociation degree of a magnesium halide electrolyte salt, and provides stable electrochemical characteristics. In addition, after determining the capacity, output characteristics and cycle life of the magnesium secondary battery including the electrolyte, the battery provides significantly higher discharge capacity after 100 cycles, as compared to the electrolyte according to the related art. Therefore, the electrolyte may be useful for an electrolyte solution of a magnesium secondary battery. 2. The electrolyte for a magnesium secondary battery according to claim 1 , wherein the non-substituted C-Clinear or branched alkyl group or C-Clinear or branched alkyl group substituted with a C-Clinear or branched alkoxy group in Ris selected from the group consisting of methyl claim 1 , ethyl claim 1 , propyl claim 1 , isopropyl claim 1 , butyl claim 1 , isobutyl claim 1 , 2-[2-(2-methoxy-ethoxy)-ethoxy]-ethyl claim 1 , cyclopentane claim 1 , cyclohexane and phenyl;{'sup': '1', 'Xis a halogen group selected from fluoride, bromide and chloride;'}{'sub': 1', '10', '1', '10', '1', '10, 'sup': '2', 'the non-substituted C-Clinear or branched alkyl group or C-Clinear or branched alkyl group substituted with a C-Clinear or branched alkoxy group in Ris selected from the group consisting of methyl, ethyl, propyl, isopropyl, butyl, isobutyl, 2-[2-(2-methoxy-ethoxy)-ethoxy]-ethyl, cyclopentane, cyclohexane and phenyl; and'}{'sup': '2', 'Xis selected from the group consisting of fluoride, bromide, chloride, a fluoroalkyl group-substituted sulfonamide group, and a fluoroalkyl group-substituted sulfonamide group.'}3. The electrolyte for a magnesium secondary battery according to claim 1 , ...

CATHODE ACTIVE MATERIAL FOR SODIUM ION BATTERY, AND PREPARATION PROCESS THEREOF

The present disclosure relates to a cathode active material for a sodium ion secondary battery having high reversible capacity and excellent cycle characteristics, and a method for preparing the same. The cathode active material for a sodium ion secondary battery shows high reversible capacity and excellent cycle characteristics, when it is applied to a secondary battery. Therefore, when the cathode active material is used for manufacturing a cathode for a sodium ion secondary battery and the cathode is applied to a sodium ion secondary battery, the battery can substitute for the conventional expensive lithium ion secondary battery and can be applied to various industrial fields. 1. A method for preparing a cathode active material comprising Zr-doped NaLiMO , the method comprising the steps of:{'sub': y', 'z', 'a', 'w, '(A) doping LiMOwith Zr; and'}{'sub': w', 'x', 'y', 'z', 'a, '(B) dissociating Li ion from the Zr-doped NaLiMOand inserting Na ion thereto, wherein M is at least one selected from Ti, V, Cr, Mn, Fe, Co, Ni, Mo and Ru, and 0.005 Подробнее

IN-SITU COIN CELL SUPPORT DEVICE FOR TRANSMISSION MODE X-RAY DIFFRACTION ANALYSIS CAPABLE OF CONTROLLING TEMPERATURE

An in-situ coin cell support device for transmission mode X-ray diffraction analysis capable of controlling temperature. The device includes a coin cell seating unit including a seating part for receiving an in-situ coin cell, a positive electrode tab coupled to the seating part and connected to a positive electrode of the in-situ coin cell, and a negative electrode tab coupled to the seating part and connected to a negative electrode of the in-situ coin cell, a housing having a heat-insulating function, which surrounds the coin cell seating unit such that the positive and negative electrode tabs extend outwards from the housing and which includes one side wall and an opposite side wall arranged opposite each other with the in-situ coin cell interposed therebetween, and a temperature control unit coupled to the exterior of the housing and including an inlet port, an outlet port, and a flow passage. 1. An in-situ coin cell support device for transmission mode X-ray diffraction analysis capable of controlling temperature , comprising:a coin cell seating unit comprising a seating part for receiving an in-situ coin cell having an X-ray transmission window, the seating part having a first through-hole formed therein to allow X-rays to pass therethrough, a positive electrode tab coupled to one side of the seating part and connected to a positive electrode of the in-situ coin cell, and a negative electrode tab coupled to an opposite side of the seating part and connected to a negative electrode of the in-situ coin cell;a housing having a heat-insulating function, the housing being disposed to surround the coin cell seating unit such that the positive electrode tab and the negative electrode tab extend outwards from the housing and comprising one side wall having a second through-hole formed therein to allow X-rays to pass therethrough and an opposite side wall having a third through-hole formed therein to allow X-rays to pass therethrough, the one side wall and the ...

SEPARATION METHOD OF ZIRCONIUM AND HAFNIUM BY SOLVENT EXTRACTION PROCESS

A separation method of zirconium and hafnium is described which includes an extraction process of agitating an undiluted aqueous solution containing zirconium, hafnium, and sulfuric acid with a first stirring solution containing an acidic extractant to produce a first extract solution in which the hafnium is extracted by the acidic extractant; and a recovery process of agitating the first extract solution with a second stirring solution containing a citric acid solution to produce a citric acid solution after extraction in which zirconium is reverse-extracted from the first extract solution to the citric acid solution so as to recover zirconium contained in the first extract solution. The method may reduce the amount of extractant while greatly enhancing the separation effect of zirconium and hafnium, and increase zirconium recovery rate by more than 97% through an additional zirconium recovery process while reducing a hafnium content in zirconium by less than 50 ppm. 1. A separation method of zirconium and hafnium , comprising:an extraction process of agitating an undiluted aqueous solution containing zirconium, hafnium, and sulfuric acid with a first stirring solution containing an acidic extractant to produce a first extract solution in which the hafnium is extracted by the acidic extractant; anda recovery process of agitating the first extract solution with a second stirring solution containing a citric acid solution to produce a citric acid solution after extraction in which zirconium is reverse-extracted from the first extract solution to the citric acid solution so as to recover zirconium contained in the first extract solution,wherein the acidic extractant comprises any one selected from a group consisting of D2EHPA (di-(2-ethylhexyl) phosphoric acid), PC88A (2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester) and their combination.2. The separation method of zirconium and hafnium of claim 1 , wherein the separation method of zirconium and hafnium further ...

CATHODE MATERIAL FOR RECHARGEABLE MAGNESIUM BATTERY AND METHOD FOR PREPARING THE SAME

Provided is a cathode material for a rechargeable magnesium battery, represented by the chemical formula of AgSSe(0≤x≤1), a highly stable cathode material and a rechargeable magnesium battery including the same. The cathode material for a rechargeable magnesium battery has a higher discharge capacity and higher discharge voltage as compared to a typical commercially available cathode material, Chevrel phase, and shows excellent stability in an electrolyte for a rechargeable magnesium battery including chloride ions. In addition, after evaluating the cycle life of the cathode material, the cathode material shows an excellent discharge capacity per unit weight after 500 charge/discharge cycles, and thus is useful for a cathode material for a rechargeable magnesium battery. 1. A cathode material for a rechargeable magnesium battery , represented by the following Chemical Formula 1:{'br': None, 'sub': 2', 'x', '1-x, 'AgSSe\u2003\u2003[Chemical Formula 1]'}wherein x is a real number satisfying 0≤x≤1.2. The cathode material for a rechargeable magnesium battery according to claim 1 , when x is 1 claim 1 , Ag2S comprises a monoclinic system crystal structure claim 1 , body-centered cubic system crystal structure claim 1 , face-centered cubic system crystal structure and an amorphous structure.3. The cathode material for a rechargeable magnesium battery according to claim 1 , when x is 0 claim 1 , Ag2Se comprises an orthorhombic system crystal structure claim 1 , cubic system crystal structure claim 1 , and an amorphous structure.4. The cathode material for a rechargeable magnesium battery according to claim 1 , when x satisfies 0 Подробнее

RECYCLING METHOD OF OLIVINE-BASED CATHODE MATERIAL FOR LITHIUM SECONDARY BATTERY, CATHODE MATERIAL FABRICATED THEREFROM, AND CATHODE AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME

The present invention relates to a method for recycling LiFePO, which is an olivine-based cathode material for a lithium secondary battery. The present invention is characterized in that a cathode material including LiFePOis synthesized using, as precursors, amorphous FePO.XHO and crystalline FePO.2HO (metastrengite) obtained by chemically treating LiFePOas an olivine-based cathode material for a lithium secondary battery, which is produced from a waste battery. Since a cathode fabricated from the LiFePOcathode material synthesized according to the present invention does not deteriorate the capacity, output characteristics, cycle efficiency and performance of the secondary battery and the cathode material of the lithium secondary battery may be recycled, the secondary battery is economically efficient. 1. A method for recycling an olivine-based cathode material for a lithium secondary battery , the method including:{'sub': '4', 'a first step of recovering a cathode material comprising LiFePOfrom lithium secondary battery cathode scraps;'}{'sub': 4', '2, 'a second step of synthesizing amorphous FePO.XHO using the recovered cathode material; and'}{'sub': 4', '2', '4', '2, 'a third step of synthesizing crystalline FePO.2HO (metastrengite) using the amorphous FePO.XHO.'}2. The method of claim 1 , further comprising a fourth step of synthesizing a cathode material comprising LiFePOusing the crystalline FePO.2HO (metastrengite) after the third step.3. The method of claim 1 , wherein claim 1 , in the first step claim 1 , the cathode material is recovered from the cathode scraps by subjecting the cathode scraps to heat treatment in an oxidizing atmosphere and then removing a current collector.4. The method of claim 3 , wherein the heat treatment is performed at a temperature of 300° C. to 500° C.5. The method of claim 1 , wherein claim 1 , in the second step claim 1 , amorphous FePO.XHO (metastrengite) is synthesized by dissolving the recovered cathode material in an acid ...

CATHODE ACTIVE MATERIAL FOR SODIUM SECONDARY BATTERY, METHOD FOR PREPARING THE SAME AND SODIUM SECONDARY BATTERY EMPLOYING THE SAME

A cathode active material for a sodium secondary battery is provided. The cathode active material includes a FeF(0.5HO)-conductive carbon material composite and is prepared by low-temperature non-aqueous precipitation. The FeF(0.5HO)-conductive carbon material composite has high capacity and excellent cycle characteristics. In addition, the FeF(0.5HO)-conductive carbon material composite is prepared in an easy and economical manner by low-temperature non-aqueous precipitation. Therefore, the use of the FeF(0.5HO)-conductive carbon material composite ensures improved performance of the cathode active material. Further provided are a method for preparing the cathode active material and a sodium secondary battery employing the cathode active material. 1. A cathode active material for a sodium secondary battery comprising a FeF(0.5HO)-conductive carbon material composite.2. The cathode active material according to claim 1 , wherein the FeF(0.5HO)-conductive carbon material composite has a morphology in which the conductive carbon material is coated on the FeF(0.5HO).3. The cathode active material according to claim 1 , wherein the conductive carbon material is selected from multi-wall nanotubes and reduced graphene oxide.4. The cathode active material according to claim 1 , wherein the conductive carbon material is present in an amount of 0.1 to 50% by weight claim 1 , based on the total weight of the FeF(0.5HO)-conductive carbon material composite.5. A method for preparing a cathode active material for a sodium secondary battery by low-temperature non-aqueous precipitation claim 1 , the method comprising:{'sub': '4', '(a) dispersing a conductive carbon material in a solution of 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF);'}{'sub': 2.5', '2, '(b) mixing the dispersion with ferric nitrate to prepare a FeF(0.5HO)-conductive carbon material composite;'}{'sub': 2.5', '2, '(c) washing the FeF(0.5HO)-conductive carbon material composite; and'}{'sub': 2.5', '2, '(d) ...

CARBON FELT IMPREGNATED WITH INORGANIC PARTICLES AND METHOD FOR PRODUCING THE SAME

Disclosed is a carbon felt impregnated with inorganic particles. The impregnated carbon felt can be used together with sulfur in a cathode of a sodium-sulfur (Na—S) battery. Also disclosed is a method for producing the impregnated carbon felt. According to exemplary embodiments, the problem of the prior art can be solved in which inorganic particles such as alumina particles are not directly adhered to carbon felts, thus necessitating complicated processes. In addition, a slurry including an inorganic binder and alumina particles can be used to directly coat the alumina particles on the surface of a carbon felt, making the production procedure very simple. Furthermore, the use of the carbon felt surface coated with the alumina particles in a Na—S battery increases the wicking of sodium polysulfides, suppresses the accumulation of sulfur as an insulator on the surface of beta-alumina as an electrolyte, and inhibits non-uniform aggregation of sulfur or sodium polysulfides on the carbon felt, so that the concentration polarization of charges can be reduced without a significant increase in the internal resistance of the battery, achieving high utilization efficiency of sulfur as a reactant. 1. A carbon felt impregnated with inorganic particles that is produced by coating with a slurry comprising an inorganic sol binder and the inorganic particles.2. The carbon felt impregnated with inorganic particles according to claim 1 , wherein the inorganic sol binder is a peptized alumina precursor sol binder or a peptized alumina precursor-alkylsilane composite sol binder.3. The carbon felt impregnated with inorganic particles according to claim 2 , wherein the alumina precursor is selected from boehmite claim 2 , aluminum ethoxide claim 2 , aluminum n-propoxide claim 2 , aluminum isopropoxide claim 2 , aluminum n-butoxide claim 2 , aluminum isobutoxide claim 2 , bayerite claim 2 , diaspore claim 2 , gibbsite claim 2 , and mixtures thereof.4. The carbon felt impregnated with ...

Cathode active material for lithium ion secondary battery including lithium manganese borate compound and manganese oxide, and method for producing the same

Disclosed is a cathode active material for a lithium ion secondary battery which includes a lithium manganese borate compound and a manganese oxide. The lithium manganese borate compound contains a larger amount of lithium than conventional lithium manganese borate compounds. Therefore, a larger amount of lithium is deintercalated in a battery including the cathode active material, and as a result, the specific capacity of the battery reaches 100-160 mAh/g, which is much higher than that of conventional lithium ion secondary batteries (<80 mAh/g). Also disclosed is a method for producing the cathode active material.

SODIUM VANADIUM OXIDE ANODE MATERIAL FOR SODIUM ION SECONDARY BATTERY, PREPARATION METHOD THEREOF AND SODIUM ION SECONDARY BATTERY HAVING THE SAME

There is provided a preparation method of a sodium vanadium oxide-based (NaVO) anode material for a sodium ion secondary battery synthesized by mixing particles of precursors such as sodium carbonate (NaCO) and vanadium oxide (VO) and pyrolyzing a mixture in a mixed gas atmosphere composed of 90 mol % of nitrogen gas and 10 mol % of hydrogen gas through a solid-state reaction. The sodium vanadium oxide-based anode material prepared according to the present invention shows a small change in volume caused by an initial irreversible capacity and continuous charge/discharge reactions, and thus it is useful for providing a next-generation sodium ion secondary battery having stable charge/discharge characteristics and cycle performance. 1. An anode material for a sodium ion secondary battery having a composition formula of NaVO(x=0.1 to 0.2).2. A preparation method of an anode material for a sodium ion secondary battery having a composition formula of NaVO(x=0.1 to 0.2) , the preparation method comprising:a first process for mixing a sodium source material with a vanadium source material; anda second process for preparing sodium vanadium oxide by heating a mixture obtained from the first process in a partially reducing atmosphere through a solid-state reaction.3. The preparation method of claim 2 , wherein the sodium source material includes sodium carbonate (NaCO).4. The preparation method of claim 2 , wherein the vanadium source material includes vanadium oxide (VO).5. The preparation method of claim 2 , wherein the partially reducing atmosphere is a mixed gas atmosphere composed of 90 mol % of nitrogen and 10 mol % of hydrogen.6. The preparation method of claim 2 , wherein the first process is carried out by mechanically milling and mixing particles of the sodium source material and particles of the vanadium source material.7. The preparation method of claim 6 , wherein the particles of the sodium source material and the particles of the vanadium source material have ...

Carbonaceous materials coated with a metal or metal oxide, a preparation method thereof, and a composite electrode and lithium secondary battery comprising the same

A carbon anode active material for lithium secondary battery comprising a cluster or thin film layer of a metal or metal oxide coated onto the surface of the carbon active material, a preparation method thereof, and a metal-carbon hybrid electrode and a lithium secondary battery comprising the same. The carbon active material is prepared through a gas suspension spray coating method. An electrode comprising the carbon active material according to the present invention shows excellent conductivity, high rate charge/discharge characteristics, cycle life characteristics and electrode capacity close to theoretical value.

Battery with trench structure and fabrication method thereof

The present invention relates to a battery having a trench structure which can increase an effective area per unit area, and a fabrication method therefor. The battery according to the present invention forms trenches on thin film elements including a substrate, thereby increasing a contact interface between a cathode and an electrolyte and between the electrolyte and an anode, and simultaneously increasing an amount of an electrode per unit area. As a result, the present invention provides a high performance battery that a current density and a total current storage density are increased, and a charging speed after discharge is improved. The trench structure of the present invention can adapt to a bulk battery as well as a thin film battery.

A composite polymer electrolyte fabricated by a spray method, a lithium secondary battery comprising the composite polymer electrolyte and their fabrication methods

The present invention provides a novel composite polymer electrolyte, lithium secondary battery comprising the composite polymer electrolyte and their fabrication methods. More particularly, the present invention provides the composite polymer electrolyte comprising a porous polymer electrolyte matrix with particles, fibers or mixture thereof having diameters of 1 - 3000 nm, polymers and lithium salt-dissolved organic electrolyte solutions incorporated into the porous polymer matrix. The composite polymer electrolyte of the present invention has advantages of better adhesion with electrodes, good mechanical strength, better performance at low and high temperatures, better compatibility with organic electrolytes of lithium secondary battery and it can be applied to the manufacture of lithium secondary batteries.

Energy-saving type zinc electrolysis method

ABSTRACT An energy saving type zinc electrolysis process wherein there is a cathodic chamber and an anodic chamber in an electrolyzer and a cathodic chamber solution is prepared by adding a small quantity of iodine ions or iodine to sulfuric acid-zinc solution. An anodic chamber solution is prepared by the addition of sulfur dioxide gas and a small quantity of oxidizing catalyst to sulfuric acid and then both solutions are electrolyzed.

Separation method of zirconium and hafnium by solvent extraction process

A separation method of zirconium and hafnium is described which includes an extraction process of agitating an undiluted aqueous solution containing zirconium, hafnium, and sulfuric acid with a first stirring solution containing an acidic extractant to produce a first extract solution in which the hafnium is extracted by the acidic extractant; and a recovery process of agitating the first extract solution with a second stirring solution containing a citric acid solution to produce a citric acid solution after extraction in which zirconium is reverse-extracted from the first extract solution to the citric acid solution so as to recover zirconium contained in the first extract solution. The method may reduce the amount of extractant while greatly enhancing the separation effect of zirconium and hafnium, and increase zirconium recovery rate by more than 97% through an additional zirconium recovery process while reducing a hafnium content in zirconium by less than 50 ppm.

Method of preparing positive active material for lithium battery

Disclosed is a method of preparing a positive active material for a lithium battery. The method comprises: depositing a positive active material on an electrode on a substrate (1); and putting metal chips on a metal oxides target and performing a sputtering process, thereby depositing mixed metal-oxides on the positive active material (2). In another aspect, the method comprises: preparing an electrode active material; preparing a precursor solution including the electrode active material; and printing the precursor solution on the substrate, and evaporating a solvent at a temperature of 80-120° C.

A composite polymer electrolyte, a lithium secondary battery comprising the composite polymer electrolyte and their fabrication methods

The present invention provides a novel composite polymer electrolyte, lithium secondary battery comprising the composite polymer electrolyte and their fabrication methods. More particularly, the present invention provides the composite polymer electrolyte comprising super fine fibrous porous polymer electrolyte matrix with particles having diameter of 1 - 3000 nm, polymers and lithium salt-dissolved organic electrolyte solutions incorporated into the porous polymer electrolyte matrix. The composite polymer electrolyte of the present invention has advantages of better adhesion with electrodes, good mechanical strength, better performance at low and high temperatures, better compatibility with organic electrolytes of lithium secondary battery and it can be applied to the manufacture of lithium secondary batteries.

Multi-layered, uv-cured polymer electrolyte and lithium secondary battery comprising the same

The present invention relates to a multi-layered, UV-cured polymer electrolyte and lithium secondary battery comprising the same, wherein the polymer electrolyte comprises: A) a separator layer formed of polymer electrolyte, PP, PE, PVdF or non-woven fabric, wherein a the separator layer having two surfaces; B) at least one gelled polymer electrolyte layer located on at least one surface of the separator layer comprising: a) polymer obtained by curing ethyleneglycoldi(meth)acrylate oligomer of the formula (I) by UV irradiation: CH 2 ═CR 1 COO(CH 2 CH 2 O) n COCR 2 ═CH 2 wherein, R 1 and R 2 are independently hydrogen or methyl group, and n is a integer of 3-20; and b) at least one polymer selected from the group consisting of PVdF-based polymer, PAN-based polymer, PMMA-based polymer and PVC-based polymer; and C) organic electrolyte solution in which lithium salt is dissolved in a solvent.

A lithium-metal composite electrode, its preparation method and lithium secondary battery

The present invention relates to a lithium-metal composite electrode, its preparation method and lithium secondary battery. The lithium-metal composite electrode comprises lithium particles or lithium alloy particles mixed with metal, and it is obtained by simultaneously depositing lithium or a lithium alloy with metal on a current collector using a thin fabrication technique, and pressing the obtained.

Cathode for a lithium secondary battery comprising vanadium oxide as a cathode active material

There is provided a cathode for a lithium secondary battery comprising vanadium oxide as a cathode active material and a conductive material stable in oxygen or sulfur atmosphere such as platinum, a conductive material stable in oxygen or sulfur atmosphere, particularly, platinum added to the vanadium oxide electrode contributes to structural stabilization of the vanadium oxide and to reduction of internal resistance, thereby improving conductivity and cycle in characteristic compared to vanadium oxide electrode without comprising such a conductive material. Accordingly, the cathode of the present invention can be used in various lithium secondary batteries including a thin film battery and bulk battery.

Photovoltaic-Charged Secondary Battery System

The present invention provides a photovoltaic-charged secondary battery system, in which an electrode for optical power generation and an electrode for charging and discharging generated electrical energy are integrated into a single cell structure, and the potential difference between the electrodes is systematically controlled, thus maximizing the conversion efficiency of optical energy, maximizing the utilization rate of cell energy, and extending the life span of the battery. For this, the present invention provides a photovoltaic-charged secondary battery system including: a transparent electrode capable of transmitting light; a PN semiconductor layer formed on the transparent electrode and generating a current by incident light; and a secondary battery layer, formed on the PN semiconductor layer, in which the current generated by the PN semiconductor layer is charged.

A lithium electrode comprising surface-treated lithium particles, its fabrication method and lithium battery comprising the same

The present invention relates to a lithium electrode comprising surface-treated lithium or lithium alloy particles, its fabrication and lithium battery comprising the same. More specifically, the present invention relates to a lithium electrode comprising lithium particles or lithium particles coated with metal or metal oxide.

Method of preparing positive active material for lithium battery

Disclosed is a method of preparing a positive active material for a lithium battery. The method comprises: depositing a positive active material on an electrode on a substrate (1); and putting metal chips on a metal oxides target and performing a sputtering process, thereby depositing mixed metal-oxides on the positive active material (2). In another aspect, the method comprises: preparing an electrode active material; preparing a precursor solution including the electrode active material; and printing the precursor solution on the substrate, and evaporating a solvent at a temperature of 80-120° C.

System for chemical vapor deposition at ambient temperature using electron cyclotron resonance and method for depositing metal composite film using the same

A system for chemical vapor deposition at ambient temperature using electron cyclotron resonance (ECR) comprising: an ECR system; a sputtering system for providing the ECR system with metal ion; an organic material supply system for providing organic material of gas or liquid phase; and a DC bias system for inducing the metal ion and the radical ion on a substrate is provided, and a method for fabricating metal composite film comprising: a step of providing a process chamber with the gas as plasma form using the ECR; a step of providing the chamber with the metal ion and the organic material; a step of generating organic material ion and radical ion by reacting the metal ion and the organic material with the plasma; and a step of chemically compounding the organic material ion and the radical ion after inducing them on a surface of a specimen is also provided.

Cathode active material for sodium ion battery, and preparation process thereof

Disclosed is a method of preparing a cathode active material useful in a sodium ion secondary battery having high reversible capacity and excellent cycle characteristics. The method for preparing a cathode active material composed of Zrw-doped NaxLiyMzOa includes the steps of (A) doping LiyMzOa with Zrw to provide Zrw-doped LiyMzOa; and (B) dissociating Li ion from the Zrw-doped LiyMzOa and inserting Na ion thereto to provide the Zrw-doped NaxLiyMzOa, wherein M is selected from Ti, V, Cr, Mn, Fe, Co, Ni, Mo, Ru, and combinations thereof, and wherein 0.005<w<0.05, 0.8≤x≤0.85, 0.09≤y≤0.11, 7≤x/y≤10, 0.7≤z≤0.95, and 1.95≤a≤2.05. When the cathode active material is used for manufacturing a cathode for a sodium ion secondary battery, the battery can substitute for a conventional, expensive lithium ion secondary battery.

Silicon thin film anode for lithium secondary battery and preparation method thereof

Disclosed are a silicon thin film anode for a lithium secondary battery having enhanced cycle characteristics and capacity and a preparation method thereof. A preparation method for a silicon thin film anode for a lithium secondary battery, comprises: preparing a collector including a metal; forming an anode active material layer including a silicon on the collector; forming one or more interface stabilizing layer, by annealing the collector and the anode active material layer under one of an inert atmosphere, a reduced atmosphere, and a vacuum atmosphere to react a metallic component of at least one of the collector and the anode active material layer with a silicon component of the anode active material layer at an interface therebetween; and forming a carbon coating layer on the anode active material layer by performing an annealing process in a hydrocarbon atmosphere.

Elektrolyt aus fester polymerzusammensetzung in homogenem zustand und herstellungsverfahren und kompositelektrode, lithiumpolymerbatterie und lithiumionenbatterie die diese verwenden und herstellungsverfahren

Anode material for secondary battery,secondary battery including the anode material and method for preparing the anode material

Disclosed is an anode material for a sodium secondary battery. The anode material includes a tin fluoride-carbon composite composed of a tin fluoride and a carbonaceous material. The anode material can be used to improve the charge/discharge capacity, charge/discharge efficiency, and electrochemical activity of a sodium secondary battery. Also provided are a method for preparing the anode material and a sodium secondary battery including the anode material.

ジルコニウムとハフニウムの分離方法及びハフニウムが除去されたジルコニウムの製造方法

【課題】ハフニウムの選択的な抽出速度を向上させ、ハフニウムが除去されたジルコニウムを迅速かつ効率的に得ることのできる、ジルコニウムとハフニウムの分離方法及びハフニウムが除去されたジルコニウムの製造方法を提供する。 【解決手段】本発明の一実施形態によるジルコニウムとハフニウムの分離方法は、ジルコニウム、ハフニウム及び硫酸を含む水溶液と触媒とを含む抽出原液を準備する準備段階と、水溶液である前記抽出原液と酸性抽出剤を含む有機相溶液とを攪拌し、前記抽出原液中のハフニウムを前記有機相溶液に選択的に抽出する抽出段階と、前記抽出段階を経てハフニウムが除去された水溶液である第１攪拌液と前記抽出段階を経た有機相溶液である第２抽出液とを分離する分離段階とを含み、前記触媒は、ハフニウムの抽出速度を向上させる金属イオンであり、ニッケルイオン、銅イオン及びこれらの組み合わせからなる群から選択されるいずれか１つである。 【選択図】図１

Uv-cured multi-component polymer blend electrolyte, lithium secondary battery and their fabrication method

The present invetion relates to a UV-cured multi-component polymer blend electrolyte, lithium secondary battery and their fabrication method, wherein the UV-cured multi-component polymer blend electrolyte, comprises: A) function-I polymer obtained by curing ethyleneglycoldi-(meth)acrylate oligomer of formula 1 by UV irradiation, CH 2 ═CR 1 COO(CH 2 CH 2 O) n COCR 2 ═CH 2 (1) wherein,R 1 and R 2 are independently a hydrogen or methyl group, and n is an integer of 3-20;B) function-II polymer selected from the group consisting of PAN-based polymer, PMMA-based polymer and mixtures thereof; C) function-III polymer selected from the group consisting of PVdF-based polymer, PVC-based polymer and mixtures thereof; and D) organic electrolyte solution in which lithium salt is dissolved in a solvent.

Carbon felt impregnated with inorganic particles and method for producing the same

Disclosed is a carbon felt impregnated with inorganic particles. The impregnated carbon felt can be used together with sulfur in a cathode of a sodium-sulfur (Na—S) battery. Also disclosed is a method for producing the impregnated carbon felt. According to exemplary embodiments, the problem of the prior art can be solved in which inorganic particles such as alumina particles are not directly adhered to carbon felts, thus necessitating complicated processes. In addition, a slurry including an inorganic binder and alumina particles can be used to directly coat the alumina particles on the surface of a carbon felt, making the production procedure very simple. Furthermore, the use of the carbon felt surface coated with the alumina particles in a Na—S battery increases the wicking of sodium polysulfides, suppresses the accumulation of sulfur as an insulator on the surface of beta-alumina as an electrolyte, and inhibits non-uniform aggregation of sulfur or sodium polysulfides on the carbon felt, so that the concentration polarization of charges can be reduced without a significant increase in the internal resistance of the battery, achieving high utilization efficiency of sulfur as a reactant.

Method for coating carbon on lithium titanium oxide-based anode active material nanoparticles and carbon-coated lithium titanium oxide-based anode active material nanoparticles produced by the method

Disclosed is a method for carbon coating on lithium titanium oxide-based anode active material nanoparticles. The method includes (a) introducing a lithium precursor solution, a titanium precursor solution and a surface modifier solution into a reactor, and reacting the solutions under supercritical fluid conditions to prepare a solution including nanoparticles of an anode active material represented by Li 4 Ti 5 O 12 , (b) separating the anode active material nanoparticles from the reaction solution, and (c) calcining the anode active material nanoparticles to uniformly coat the surface of the nanoparticles with carbon. Further disclosed are carbon-coated lithium titanium oxide-based anode active material nanoparticles produced by the method. In the anode active material nanoparticles, lithium ions are transferred rapidly. In addition, the uniform carbon coating ensures high electrical conductivity, allowing the anode active material nanoparticles to have excellent electrochemical properties.

Cathode active material coated with fluorine-doped lithium metal manganese oxide and lithium-ion secondary battery comprising the same

Provided are a cathode active material coated with a fluorine-doped spinel-structured lithium metal manganese oxide, a lithium secondary battery including the same, and a method for preparing the same. The cathode active material has improved chemical stability and provides improved charge/discharge characteristics at elevated temperature (55-60° C.) and high rate. The cathode active material allows lithium ions to pass through the coating layer with ease and is chemically stable, and thus may be used effectively as a cathode active material for a high-power lithium secondary battery.

Recycling method of olivine-based cathode material for lithium secondary battery, cathode material fabricated therefrom, and cathode and lithium secondary battery including the same

The present invention relates to a method for recycling LiFePO 4 , which is an olivine-based cathode material for a lithium secondary battery. The present invention is characterized in that a cathode material including LiFePO 4 is synthesized using, as precursors, amorphous FePO 4 .XH 2 O and crystalline FePO 4 .2H 2 O (metastrengite) obtained by chemically treating LiFePO 4 as an olivine-based cathode material for a lithium secondary battery, which is produced from a waste battery. Since a cathode fabricated from the LiFePO 4 cathode material synthesized according to the present invention does not deteriorate the capacity, output characteristics, cycle efficiency and performance of the secondary battery and the cathode material of the lithium secondary battery may be recycled, the secondary battery is economically efficient.

Electrolyte for magnesium rechargeable battery and preparation method thereof

Disclosed is an electrolyte solution for a magnesium rechargeable battery with a high ionic conductivity and a wide electrochemical window compared to the conventional electrolyte solution. The electrolyte solution is prepared by dissolving magnesium metal into the ethereal solution using combinations of metal chloride catalysts. The electrolyte solution can be applied to fabricate magnesium rechargeable batteries and magnesium hybrid batteries with a markedly increased reversible capacity, rate capability, and cycle life compared to those batteries employing the conventional electrolyte solution. Also disclosed is a method for preparing the electrolyte.