SEPARATOR AND SECONDARY BATTERY USING SAME

Hereinafter the present invention. as further described relative to. Specification herein a not described in the technical field of the present invention is a classic mirror server, in particular in the fields of or similar sufficiently recognize and deducing the graphitic surface can be ., which does not require a an annealing process is the explanation.

Of the present invention in one example, porous substrate, and said formed on the both sides or one surface of porous substrate, (meth) acrylate monomer derived of repeating-unit-having an acryl-based copolymer and a weight average molecular weight of 1,000,000 g/mol or more including vinylidene fluoride polymer containing adhesion layer, isolation is provided.

A plurality of porous substrate having pores with said conventional can be used in electrochemical element, use can be made of, a porous substrate. Porous substrate include but not limited to polyethylene, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyester, polyacetal, polyamide, polyimide, polycarbonate, polyether-ether-ketone, polyaryl ether ketone, polyether-imide, polyamide-imide, poly benzimidazole, polyethersulfone, polyphenylene oxide or polyphenylene ether-based, cyclic olefin copolymer, polyphenylene sulfide and polyethylene naphthalene selected from the group consisting of heterogeneous at which one polymer or a polymer or more mixtures reflective. In one example, said polyolefin porous substrate can it will be a record , the shutdown polyolefin (shut down) the stability of the cell with the paper is may contribute to its improve safety. The polyolefin, for instance, polyethylene single layer, polypropylene homopolymer film, double layer polyethylene/polypropylene, polypropylene/polyethylene/polypropylene triple film and polyethylene/polypropylene/polyethylene triple film made of a can be selected. In another, non in addition to polyolefin resin the polyolefin resin is includes or olefin, olefin and a non-olefin monomer may include a copolymer of. The thickness of the porous substrate said micro 1 m to 40 micro m and the shaft transfers the, more specifically 5 to 15 micro m can be. Said thickness range in when base material, positive electrode and the negative electrode of the battery to prevent short thick enough to be able to increase internal resistance of the cell required from the outside not thick adhesion between the electrodes and the, has a charge-suitable isolation can be produced.

Said adhesive layer may be formed composition adhesive layer, adhesive layer composition (meth) acrylate monomer derived of repeating-unit-having an acryl-based copolymer and a weight average molecular weight of 1,000,000 g/mol or more vinylidene fluoride polymer and may comprise an solvent. In another, said adhesive layer composition inorganic particles may further comprise the. Charge/discharge before good adhesive force an organic solvent; and/or after the charge/discharge even if the channel estimation may be significantly degraded can be degraded and R2 are same or different hydrogen or, binder adhesive layer herein are (meth) acrylate monomer derived of repeating-unit-having an acryl-based copolymer and a weight average molecular weight of 1,000,000 g/mol or more for use with polymer vinylidene fluoride, charge/discharge before actual isolation layer is formed on a fluorescent layer which sacrificial electrode used after in charge and discharge the environment where the sacrificial electrode charge/discharge in addition can be improved and the stability of the shape of cell after it is possible to improve the. Said acrylic copolymer (meth) acrylate monomer derived repeating units derived repeating units in addition to an acetate group containing monomer may further include any further.

Said an acryl-based copolymer and said polyvinylidene fluoride polymer the weight ratio of 8:2 to 5:5, specifically 6:4 to 8:2, more particularly can be 8:2 to 7:3. Said weight ratio range it is favorable that the charge/discharge even after secondary battery and good adhesive strength and electrolyte wetting property can be advantageous in. Acrylic copolymer wherein the weight ratio of an organic solvent; and/or cathode after discharging higher are the matrix polymer and tends to the second scattered reflection acrylic copolymer wherein the weight ratio of higher adhesion advantageous in too high weight ratio but when. is in the adhesive layer. Said polyvinylidene fluoride polymer include e.g. for example polyvinylidene fluoride homopolymer, polyvinylidene fluoride-hexafluoropropane propylene copolymer, or variations thereof surface of the radioactive part into contact polymer, particularly the invention vinylidene fluoride-hexafluoropropane, use can be made of, propylene copolymer. Said polyvinylidene fluoride polymer weight average molecular weight of 1,000,000 g/mol to 1,700,000 g/mol (Mw) the surface may be in the range of.. Is (Mw) weight average molecular weight more specifically than 1,000,000 g/mol to 1,500,000 g/mol. surface may be in the range of. Said molecular weight range in the based PVdF porous membranes and R2 are same or different hydrogen or after charge/discharge between substrates efficient electrical outputs are enhanced properties attributed to cell capable of producing contact point is turned off. Said acrylic copolymer glass transition temperature of the (Tg) 100 °C hereinafter, for example, can be 20 °C to 60 °C. If said range be situated between the electrode isolation, b and their it possible to ensure a good adhesion at a temperature at which the shrinkage formed for promoting heat resistance and. can be advantageously. Said acrylic copolymer a weight average molecular weights in 100,000 g/mol to 1,000,000 g/mol and, specifically 300,000 to 800,000 g/mol, 400,000 to 700,000 g/mol. surface may be in the range of. Herein that may be used in (meth) acrylate derived monomer acrylic copolymer of repeating-unit-having said good between anode and cathode such as adhesion, method of making the same if those which may form one limited to, extracts of Barks of perception, for example, butyl (meth) acrylate, profile (meth) acrylate, ethyl (meth) acrylate and methyl (meth) acrylate to 1 selected from the group consisting of at least one (meth) acrylate monomer is polymerized, thus can be the resulting copolymer is in the. The acrylic copolymer said or (meth) acrylate, profile (meth) acrylate, ethyl (meth) acrylate or methyl (meth) acrylic (meth) acrylate monomer and [...] such as, other monomer, for example, vinyl acetate or allyl acetate and such of a acetate-containing monomer is polymerized, thus can be the resulting copolymer is in the.

Said an acetate group containing monomer derived the repeat unit can be the repeating units of formula 1:

[Formula 1]

In said formula 1, R₁ or coupled a single, straight or branched carbon can 1 to 6 alkyl, R₂ is hydrogen or methyl and, between each l is integer number of 1 to 100. For example, said an acetate group containing monomer derived repeating units of vinyl acetate and allyl acetate from the group consisting of one or more selected an acetate group containing monomer derived can be repeating units. Said acrylic copolymer (meth) acrylate through polymerization or, (meth) acrylate monomer and (meth) acrylate monomer is polymerized, thus other other can be produced. For example, said other monomer includes a filter material of acetate groups can be. In this case, (meth) acrylate monomer and other monomer, specifically an acetate group containing monomer mole ratio 3:7 to 7:3, 6:4 to 4:6 specifically, more particularly by about 5:5, at a ratio of polymerization can be produced. Said acrylic copolymer for example, butyl (meth) acrylate monomer, methyl (meth) acrylate monomer, and apparatus for proportioning and mixing and/or allyl acetate monomer, 1.5 to 5 : 0.5 to 3 weight ratio: 3 to 7, specifically, 4:1: reacting polymerizing polymerizable 5 can be produced.

Limited to, extracts of Barks of inorganic particles used in the present invention, if the art using used to monitor the, use can be made of, inorganic particles of. Available in the present invention for example, but not limited to of inorganic particles Al₂ O₃, SiO₂, B₂ O₃, Ga₂ O₃, TiO₂ or SnO₂ as to the aromatic hydrocarbon. They are alone or by mixing at least one 2, use can be made of,. Inorganic particles used in the present invention for example include e.g., Al₂ O₃ (alumina) that is capable of using optical. The size of the inorganic particles used in the present invention can be realized or limited to, extracts of Barks of, 1 nm to 2,000 nm and the shaft transfers the average particle diameter, for example, 100 nm to 1,000 nm, 400 nm to 600 nm can be. said event of the use of a inorganic particles in a size range, adhesive layer composition of inorganic particles dispersibility and adhesive layer of fairness is possible to prevent that a thickness adhesive layer of mechanical property, is adjusted such system to generate multiple output layer, the oxide layer and the of electrical resistance the. Furthermore, isolation of pore sizes and a which is produced by a properly, is adjusted such a charge rate of a battery during the probability a short up and down the power window, which is capable of reducing contact point is turned off. The preparation of a composition adhesive layer the inorganic particles an inorganic dispersing a suitable solvent can be used on. The solvent suitable said confirmation, if the limited to, extracts of Barks of commonly used in the art, use can be made of, a solvent. Said inorganic-particles dispersed moderate as a solvent for example, acetone, use can be made of,. Method for preparing an inorganic dispersant said a special free, by the conventional ones in the method can be, for example Al₂ O₃ adding content to rationalization on the with the beads mill (Beads mill) data and status data being programmed milling using inorganic dispersion in a manner can be produced. Adhesive layer in said inorganic particles, based on the total weight of adhesive layer 50 to 95 weight %, specifically 75 to 95 weight %, more specifically 80 to 95 weight body is included to the display apparatus %. When contains inorganic particles within such a range said, inside the inorganic particles can be fully exhibited porous substrate using the same two patterns of the first to be heat-shrunk when adhesive layer is suppressed effectively.

Said solvent available in the present invention example, but not limited to, acetone, dimethyl formamide (Dimethyl formamide), Dimethylsulphoxide (Dimethyl sulfoxide), dimethylacetamide (Dimethyl acetamide), dimethyl carbonate (Dimethyl carbonate) or N as to the aromatic hydrocarbon (N-methylpyrrolydone)-methylpyrrolidone. Adhesive layer weight of the composition, of a solvent content of 20 to 99 weight % and the shaft transfers the, specifically which may be 50 to 95 weight %, more particularly can be 70 to 95 weight %. When the range of said adhesive layer composition is provided to facilitate the manufacturing process and has an adhesion layer can be smooth performance drying operation.

According to another example of the present invention the adhesive layer and the adhesive layer composition said acrylic copolymer or poly vinylidene fluoride polymer in addition to other binder may further comprise the. Examples of a binder can be added, a group including polyester, cellulose triacetate (polymethylmethacrylate), polyacrylonitrile (polyacrylonitrile), polyvinyl pyrrolidone (polyvinylpyrrolidone), polyvinyl acetate (polyvinylacetate), polyethylene oxide (polyethylene oxide), cellulose acetate (cellulose acetate), cellulose acetate butyl rate (cellulose acetate butyrate), cellulose acetate propionate (cellulose acetate propionate), cyano (cyanoethylpullulan) roh ethyl grass base column , roh ethyl pulley vinyl alcohol cyano (cyanoethylpolyvinylalcohol), cyano (cyanoethylcellulose) roh ethyl cellulose , cyano (cyanoethylsucrose) [...] , pullulan (pullulan), carboxyl methylcellulose which has been milled to a (carboxyl methyl cellulose), and acrylonitrile [...] copolymer (acrylonitrilestyrene-butadiene copolymer) for supporting stand-alone selected from the group consisting of:or mixtures thereof. In one example, weight average molecular weight of less than 1,000,000 g/mol is additionally used is polymer vinylidene fluoride can be

According to another example of a dump truck of the present invention, porous substrate, and said formed on the both sides or one surface of porous substrate, binder containing adhesion layer-aligned patterns as including, after a charge rate of a battery during said isolation of the two formulas 1 resists transfer to the anode or anode active material for isolation at least 50% rate respectively.

[Type 1]

Transfer rate (%) = (A₁/A₀) × 100

In said type 1,

A₀ and total area of the cathode or anode, A₁ comprises a positive electrode, an electrode and isolation forming an assembly and at a temperature of 110 °C to 20 °C, 1 seconds to 5 seconds, 1 kgf/cm² to 30 kgf/cm² distributed load of and compressed difference 1, made of compression said electrode assembly 110 °C to 60 °C and injecting an electrolyte thereinto, 30 seconds to 180 seconds, 1 kgf/cm² to 30 kgf/cm² distributed load of water-difference after 2, charging, the discharge and charge sequentially when embodiment is transferred to an anode or anode active material for isolation is area. Method area measuring anode active material for said anode or the active material area to the canister and can be electrically opened as no restrictions but, for example, publicly known Image camera (e.g.: lumenera yarn resolution camera) to isolation after photographing, publicly known Image analyzer (e.g.: Easy Measure converter 1.0.0.4) using anode or anode active material for transfer to..

Said charging, the discharge and charge of the condition of the examples to table 1 as:

Said anode or anode active material for isolation 50% rate resists transfer to the charge/discharge or more after cell the stability of the shape of and adhesion. relates to. Said transfer rate in particular modulates the 55% or more, more particularly 60% or more, than more specifically at least 70%.

Said binder in adhesive layer in the aforementioned an acryl-based copolymer and a weight average molecular weight of 1,000,000 g/mol or more vinylidene fluoride polymer may be, other inorganic particles or provided as a word line room to guide the solvent method, type and content can be used.

According to e.g. said serve additional of a dump truck the rate of change is thickness of formula 2 can be 7% hereinafter. Specifically the variable ratio of thickness of the 5% hereinafter, can be 3% hereinafter more particularly.

[Type 2]

Variable ratio of thickness of (%) = [(T₁-T₂)/ T₁] ×100×100

In said type 2, T₁ the between the positive electrode and the negative isolation through a pressure-, said anode, cathode is separation membrane and 7 cm laminate are stacked in this order (longitudinal) has linear shape in winding ×6.5 cm (widthwise) forming an assembly electrode the measured thick and, said T₂ an electrode formed assembly the 110 °C to 20 to 1 in 30 kgf/cm² pressure of 1 to 5 seconds is thickness measured after press. If range is variable ratio of thickness of said said by the following formula 1. form of cell.

Air permeability of a dump truck according to of the present invention in the embodiment 500 sec/100cc hereinafter, specifically 50 to 400 sec/100cc, more particularly 50 to 300 sec/100cc, can be. Two patterns of the first of the present invention in the embodiment according to of tensile strength direction MD 1750 kg/cm² at least, of tensile strength direction TD 1700 kg/cm² at least. Specifically two patterns of the first direction and the tensile strength of the MD 1750 kg/cm² to 2550 kg/cm² and, of tensile strength direction TD 1700 kg/cm² to 2500 kg/cm² can be. After discharging such as on of a dump truck according to examples of the present invention form stability, and adhesion-aligned patterns as the third-and extrusion required. also basic properties required.

Hereinafter, according to one embodiment of the present invention relates to manufacturing method of separation membranes. The manufacturing method of separation membranes according to one embodiment of the present invention (meth) acrylate derived monomer acrylic copolymer of repeating-unit-having, and weight average molecular weight of 1,000,000 g/mol or more including vinylidene fluoride polymer binder; and a solvent adhesive layer form a composition including, on one side or both sides of said porous substrate same adhesive layer composition as to adhesive layer. Said acrylic copolymer vinyl acetate or allyl acetate monomer derived repeating units such as an acetate group containing monomer may further comprise the.

First, said adhesive layer composition to form a an acryl-based copolymer and a weight average molecular weight of 1,000,000 g/mol or more binder including polymer vinylidene fluoride, 10 to 40 °C mixing and and a solvent in a stirring time 5 minutes to 30 may include a. When including inorganic particles, an inorganic solution stirring said can be from particles by using centrifugal force. At this time, solids, content adhesive layer compositions can be part by weight 20 to 10, solids the binder and inorganic particles the weight ratio of 3:7 to 0.5:9.5 can be.

Or, said inorganic-particles dispersed dispersed in and dispersions are prepared of an inorganic, same acrylic copolymer and polyvinylidene fluoride polymer binder and including the polymer mixed with a solution between the adhesive layer composition can be produced. As said inorganic dispersion when separately manufactured, inorganic particles and binder dispersibility and trillion misfortunes the objective compound. stability. Therefore, in another aspect, of the present invention may be carried out at an adhesive layer composition, each binder component and mineral particles a suitable solvent made from dissolved or dispersed in and mixed can be. For example, acrylic copolymer and polyvinylidene fluoride binder each of and a solution absorbed into suitable, inorganic particles is distributed each prepared inorganic dispersion, them in such a way that a suitable solvent and an adhesive layer composition can be produced. Said mixing the ball mill (Ball mill), beads mill (Beads mill) or a screw mixer (Screw mixer) or the like can be used..

Furthermore, adhesive layer said porous substrate on one side or both sides of the adhesive layer composition. Porous substrate layer adhered to confirmation, if the limited to, extracts of Barks of the method, a commonly used in various technical fields of the present invention method, method coatings, as examples, lamination (lamination), co-extruded, use can be made of, such as (coextrusion). For example, but not limited to said coating method, deep (Dip) coating method, die (Die) coating method, roll-coating or comma (Roll) as to the aromatic hydrocarbon (Comma) coating method. They are alone or by mixing 2 or more of method can be applied. Two patterns of the first adhesive layer of the present invention for example dip coating method on can be.

0.01 to 20 micro thickness adhesive layer of the present invention m which may be, specifically 1 to 10 micro m, more particularly 1 to 5 micro m can be. Said thickness within the range, a thickness of an adhesive layer thermally stable excellent improved adhesive and slippery properties which the film is to be formed, too thick thickness of entire separator and prevent it from the stability of the cell with the an increase in internal resistance is suppressed.

The hot air having absorbed drying adhesive layer in the present invention, hot air, low humidity airflow produced by drying or high vacuum drying or far infrared rays or electron beam a TV unit, use can be made of, a method. Solvent and dried at and difference space for generally but at a temperature of 60 to 120 °C drying. Drying time also solvent generally but difference space for 1 minutes to 1 time drying. In one embodiment, at a temperature of 70 to 120 °C 30 ingredient minutes to 1, or 1 minutes to 10 ingredient drying.

Another according to one example, a of the present invention, anode; cathode ; a between an anode and a cathode and said, an adhesive layer is disclosure herein including porous separation membrane; and an electrolyte provides including secondary battery.

Limited to, extracts of Barks of the kind of secondary battery said confirmation, if the, kinds of known in various technical fields of the present invention can be cell.

Of the present invention said secondary battery specifically lithium metal secondary battery, lithium ion secondary battery, lithium polymer secondary battery or li-ion polymer secondary battery such as a lithium secondary cell can be.

Secondary battery of the present invention, if the limited to, extracts of Barks of the method, a commonly used in various technical fields of the present invention, use can be made of, method.

Said secondary battery but not limited to, an expanded method include: a porous separation membrane including adhesive layer of the present invention said, between an anode and a cathode and of then, electrolyte is that fills manner cell can be produced.

Also one example or also 1 and Figure 2 shows a decomposition of secondary battery according to another example is perspective view. Secondary battery, according to some exemplary embodiments a square-shaped or cylinderical cell is described, for example, but, the present invention are not limited to blood is, pouch-type battery, lithium polymer battery of a polyimide resin, such type battery can be applied to the.

Also consults a surface 1 and 2, secondary battery, according to some exemplary embodiments (100, 200) comprises a positive electrode (10, 10 ') and a cathode (20, 20') isolation between the (30, 30 ') via a [...] electrode assembly (40) and a, said electrode assembly (40) with a built-in case (50, 50') includes. Said anode (10, 10 '), said cathode (20, 20') and said isolation (30, 30') (not shown) is impregnated with an electrolytic solution.

Said isolation (30, 30') by establishing an optical fiber at a equal.

Said anode (10, 10') employing an anode current collecting body and said cathode active material composition is then removed and positive electrode collector may include material layer. Silicon and oxygen anode active said anode active material, binder and optionally may comprise an conductive material.

Said positive electrode collector (Al) aluminium, nickel (Ni) but fixing, not limited to.

Said a lithium anode active material and intercalation reversibly [...] a compound capable of, use can be made of,. Specifically cobalt, manganese, nickel, aluminum, iron or combinations of those, in composite oxide or combination with an electrode and a lithium metal phosphate in, use can be made of, at least one 1. More specifically, lithium cobalt oxide, lithium nickel oxide, lithium manganese oxide, lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminum oxide, method for preparing lithium iron phosphate or a combination thereof, use can be made of,.

Said binder a positive electrode active material particles adhere well each other as well as the positive electrode collector positive electrode active material adheres well to which which serves to fasten the, a specific example polyvinyl alcohol, carboxymethyl cellulose, hydroxypropyl cellulose, diacetyl cellulose, polyvinyl chloride, , provided the nature of the carboxylated polyvinyl chloride, poly [...] , ethylene oxide containing polymer, polyvinyl pyrrolidone, polyurethane, blends of polyamide blockpolymers and of copolymers, polyvinylidene fluoride, polyethylene, polypropylene, styrene-butadiene rubber, an interfacial insulating layer of an acrylic styrene-butadiene rubber, epoxy resin, nylon provided to be, not limited to. They are 2 alone or in at least one can be used as a light-weight.

An electrode conductive material said conductive is to be given to, to, examples of which natural graphite, artificial graphite, carbon black, carbon fiber, metal powder, metal fiber provided to be, not limited to. They are 2 alone or in at least one can be used as a light-weight. Said metal powder and said copper metal fiber, nickel, aluminum, metal such as, use can be made of,.

Said cathode (20, 20') said collector and a negative-electrode-side layer to an anode formed on a cathode current collecting body can be active material layer.

Said cathode the copper (cu), gold (Au), nickel (Ni), copper alloys, etc and in the height, not limited to.

Silicon and oxygen anode active said cathode active material, binder and optionally may comprise an conductive material.

Said cathode active material a lithium ions reversibly cycle characteristics and low temperature characteristics of materials that can, lithium metal, alloy of lithium metal, lithium dope and [...] materials which can be, transition metal oxide or combinations thereof, use can be made of,.

Said lithium ions reversibly layer is cycle characteristics and low temperature characteristics of the radioactive part into contact with carbon-containing substance, which can, examples include amorphous carbon, amorphous carbon or a combination thereof can be. Examples of amorphous carbon said amorphous, plate, scale-like (flake), spherical or fiber-type of: natural graphite or artificial graphite. Examples of amorphous carbon said soft carbon (soft carbon) or hard carbon (hard carbon), mesoporous face pitch carbide, as to the aromatic hydrocarbon coke calcined. Said of lithium metal alloys include metal alloyable with lithium and a Na, K, Rb, Cs, Fr, Be, mg, Ca, Sr, Si, Sb, Pb, In, Zn, Ba, Ra, Ge, Al and Sn the group consisting of a metal alloys can be used. Said layer is can [...] dope and lithium Si, SiO_x (0 < x < 2), Si-C composite, Si-Y alloy, Sn, SnO₂, Sn-C composite, and as to the aromatic hydrocarbon Sn-Y, in addition at least one and SiO₂ the may be. Said element Y include mg, Ca, Sr, Ba, Ra, Sc, Y, Ti, Zr, Hf, Rf, V, Nb, Ta, Db, Cr, Mo, W, Sg, Tc, Re, Bh, Fe, Pb, Ru, Os, Hs, Rh, Ir, Pd, Pt, cu, Ag, Au, Zn, Cd, B, Al, Ga, Sn, In, Tl, Ge, P, As, Sb, Bi, S, Se, Te, Po and combinations thereof can be selected from the group consisting of. Said transition metal oxide include vanadium oxide, preparation method of lithium vanadium as to the aromatic hydrocarbon.

Said cathode used in the kind of conductive material with a binder which a positive aforementioned used in with a binder which conductive materials and equal.

Said each positive electrode and the negative electrode active material and binder selectively conductive material each incorporated in a solvent for use in the preparation of active material, said active material composition has been applied to the respective current collectors the can be produced. the solvent N-methylpyrrolidone fixing but, not limited to. Such an electrode widely known to the field of processes for preparing the manufacturing method, a heating part the user to the detailed specification to a dispensed the description.

Said electrolyte includes, and a lithium salt organic solvents.

Said semiconductor integrated circuit device having miniature organic solvent having chemical relating to the ions each of which may be movable and serves to direct medium. The concrete examples, carbonate solvent, ester-based solvent, ether solvent is regulated so as to have, ketone-series solvent, alcohol in solvent and an aprotic solvent can be selected.

Examples of said solvent carbonate, dimethyl carbonate (DMC), diethyl carbonate (DEC), polycarbonate dipropye (DPC), methyl propyl polycarbonate (MPC), polycarbonate ethyl propyl (EPC), ethylmethyl carbonate (EMC), ethylene carbonate (EC), propylene carbonate (PC), as to the aromatic hydrocarbon polybutylene polycarbonate (BC). Specifically, chain type mixing carbonate compound and an annular carbonate compound as the same a small viscous support as dielectric constant can be produced solvent. The annular the carbonate compound type and a chain carbonate compound blended at a volumetric ratio of 1:9 to 1:1, use can be made of, the.

Examples of said ester-based solvent, methyl acetate, ethyl acetate, n-propyl acetate, dimethyl acetate, methyl phenylpropionate, ethyl phenylpropionate, γ-butyrolactone, the car it is yellow the id (decanolide), ballet propoxybenzeneacetic acid, [...] (mevalonolactone), as to the aromatic hydrocarbon polycaprolactone (caprolactone). Examples the solvent of ether said, d butyl ether , tetra glow lime, being a D writing, , [...] , [...] methyl 2-, as to the aromatic hydrocarbon rearranging circuit. Said ketone-series solvents comprise trialkylamines and as to the aromatic hydrocarbon cyclohexanone, said alcohol solvents comprise trialkylamines ethyl alcohol, isopropyl alcohol as to the aromatic hydrocarbon.

2 alone or in organic solvent having said at least one mixing therefore, when mixed at least one 2 the blending ratio of the siliconized according to a desired battery performance can be properly controlled.

Said lithium salt is solubilized in a organic solvent, in a cell source of lithium ion in acts in the manner of basic permitting failsafe operation of a secondary cell and, lithium ion in between anode and cathode is a material stimulates the movement of..

Examples of a lithium salt said, LiPF₆, LiBF₄, LiSbF₆, LiAsF₆, LiN (SO₃ C₂ F₅)₂, LiN (CF₃ SO₂)₂, LiC₄ F₉ SO₃, LiClO₄, LiAlO₂, LiAlCl₄, LiN (C_x F_2x+1 SO₂) (C_y F_2y+1 SO₂) (x y and the 105,106,107), LiCl, LiI, LiB (C₂ O₄)₂ can be mentionned or a combination thereof.

2.0M to 0.1M said lithium salt concentration, use can be made of, within the range. When lithium salt concentration in the range of said, electrolyte an appropriate conductivity and has a viscosity have excellent electrolyte performance may indicate, lithium ions can be effectively.

Hereinafter, in the embodiment, compared thereby, the cold air flows and e.g. described by the described S406 the present invention. Just, of the following in the embodiment, compared e.g. which the persons can just one example of the present invention and relate limited to contents of the present invention is interpreted to. is not but.

In the embodiment

In the embodiment 1: isolation film manufacturing

Butyl methacrylate (Buthyl Methacrylate, BMA), methyl methacrylate (Methyl Methacrylate, MMA), vinyl acetate (Vinyl Acetate, VAc) molar ratio 4/1/5 is polymerised in the acrylic copolymer binder acetone (acetone) dissolving the solid binder solution and 5 weight % in number 1, PVdF-HFP ([...] KF9300 bottom dead center, Mw: 1,200,000 g/mol) of acetone, the mixture of the dried metal precursor mixing DMAc 7 solid weight % binder solution a solution been produced with at each number 2. Alumina (LS235, Japanese light metal) with the time a subsequent filtration step to 3% weight 25 to beads mill dispersion was the alumina dispersions are prepared. On binder PVdF-HFP and a binder so that the weight ratio of 6:4, 1/6 solids, alumina solid binder in ratio number 1, number 2 corresponding advertisement based on the shown mixing alumina dispersed solution and binder, based on the total solid component weight is 12% by the addition of acetone so that taken along a line perpendicular to a have been prepared. 7 micro m in polyethylene fabric thickness ([...] SK) on both sides of each said coating solution 2 micro micro 11 total thickness to from the thickness m m degree isolation was produced.

In the embodiment 2: isolation film manufacturing

Binder PVdF-HFP and a binder in said in the embodiment 1 wherein the weight ratio of 7:3 a provide a way to make the connected said in the embodiment 1 except for the host supplying embodiment equal to the manufacturing processes and the cost of production isolation in the embodiment 2.

In the embodiment 3: isolation film manufacturing

In said in the embodiment 1 and a binder wherein the weight ratio of binder PVdF-HFP 8:2 a can be brought to said in the embodiment 1 except for the host supplying embodiment equal to the manufacturing processes and the cost of production isolation in the embodiment 3.

In the embodiment 4: isolation film manufacturing

5130 instead KF9300 binder number 2 in said in the embodiment 1 (brush hemp cloth moving, weight average molecular weight: 1,200,000 g/mol to 1,000,000) using the in the embodiment 1 except for the host supplying embodiment equal to the manufacturing processes and the cost of production isolation in the embodiment 4.

In the embodiment 5: isolation film manufacturing

5130 and a binder in said in the embodiment 4 wherein the weight ratio of binder 7:3 a provide a way to make the connected said in the embodiment 4 except for the host supplying embodiment equal to the manufacturing processes and the cost of production isolation in the embodiment 5.

In the embodiment 6: isolation film manufacturing

5130 and a binder in said in the embodiment 4 wherein the weight ratio of binder 8:2 a can be brought to said in the embodiment 4 except for the host supplying embodiment equal to the manufacturing processes and the cost of production isolation in the embodiment 6.

Compared e.g. 1: isolation film manufacturing

21216 instead KF9300 binder number 2 in said in the embodiment 1 (brush hemp cloth moving, weight average molecular weight: 570,000 to 700,000 g/mol, PVDF-HFP copolymer) using the in the embodiment 1 except for the host supplying 1 e.g. the sensing voltage from the sensing embodiment equal to manufacturing processes and the cost of production isolation.

Compared e.g. 2: isolation film manufacturing

21216 and a binder in said compared e.g. 1 wherein the weight ratio of binder 7:3 a way to make the connected modules 1 a except for the host supplying equal to said compared e.g. 2 isolation embodiment the sensing voltage from the sensing e.g. manufacturing processes and the cost of production.

3 e.g. compared: isolation film manufacturing

21216 and a binder in said compared e.g. 1 wherein the weight ratio of binder 8:2 a way to make the connected modules 1 a except for the host supplying equal to said compared e.g. 3 isolation embodiment the sensing voltage from the sensing e.g. manufacturing processes and the cost of production.

4 e.g. compared: isolation film manufacturing

Number 2 6020 instead KF9300 binder in said in the embodiment 1 (brush hemp cloth moving, weight average molecular weight: 670,000 to 700,000 g/mol, PVDF homopolymer) at a weight ratio of 7:3 a except used in the range of equal to said in the embodiment 1 embodiment the sensing voltage from the sensing e.g. 4 isolation manufacturing processes and the cost of production.

Said in the embodiment 1 to 6 and comparison example 1 to 4 according to table a composition of each isolation exhibits to 2.

Experiment e.g.

Said in the embodiment 1 to 6 and comparison example 1 to 4 downwardly separation membranes prepared in measurement disclosure to also venting method; tensile strength; discharging before and charge/discharge after active material transfer rate; nozzle of a print head variable ratio of thickness of determining the result showed to 3 table.

1. Extrusion

Separation membranes prepared implementations allocate fewer said in the embodiment and comparison 1 won in (inch) inch diameter each of has a dimension sufficient to enable each is put two different 10 at the point of cutting a 10 of sample and then, measuring device (asahitax nose yarn) extrusion using 100cc said air each sample it was determined that time passage of water. At said times of or five times calculates a mean value the second light drop unit drops part vent the road.

2. Tensile strength

Said in the embodiment and comparison (MD) 50 mm × the gate each separation membranes prepared implementations allocate fewer longitudinal (TD) 150 mm, and by a transverse (TD) 50 mm rectangular-formed longitudinal (MD) 150 mm × 5 10 a cutting one by one each of sample and then, for each sample said UTM (tension tester) to 20 mm length to a DC through the converter so that said sample after physical MD direction and pulled it was determined that tensile strength average direction TD.

3. Variable ratio of thickness of

Said in the embodiment the anode separation membranes prepared implementations allocate fewer and comparison between the in an electrode assembly placement in the thickness of and for measuring a rate of change in the method is performed for all the of.

Anode active material LCO (LiCoO₂) a thickness thicker thickness of aluminum foil m micro 14 94 µm preferably and dried, rolled total thickness 108 micro m of making and anode, cathode active material (Natural Graphite) natural graphite: artificial graphite (Artificial Graphite) = 1:1 copper foil in the thickness 8 micro m 120 µm preferably and dried, rolled total thickness 128 micro m been produced with at cathode of.

Said anodes and cathodes 100 cm (longitudinal) and to tailor each ×6.3 cm (width direction), in the embodiment and comparison 100 cm of separation membranes prepared implementations allocate fewer ×6.5 cm (width direction) (longitudinal) after edge cutting machine, interposed therebetween and a solid electrolyte between the positive electrode and the negative ×6.5 cm (longitudinal) 7 cm (widthwise) chip to rewind at electrode forming an assembly and electrode assembly a thickness of 30 cm steel it was determined that using the second rectangular ruler is (T₁).

In said electrode assembly after 100 °C 5 kgf/cm² 3 seconds after press pressure of 30 cm steel electrode composed of the Ti layer, the second rectangular ruler is described for measuring the thickness of an assembly (T₂), formula 2 so that its wall thickness range, the rate of change of the bill.

[Type 2]

Variable ratio of thickness of (%) = [(T₁-T₂)/ T₁] ×100

4. Rate transfer active material after and charge/discharge before discharging

Anode active material that its wall thickness LCO (LiCoO2) 94 µm thickness of aluminum foil 14 µm preferably and dried, of m micro 108 total thickness rolled been produced with at anode. Cathode active material natural graphite and artificial graphite (1:1) in the thickness 8 µm 120 µm copper foil preferably and dried, rolled total thickness 128 micro m been produced with at cathode of. Electrolyte at 1.5M LiPF6 mixed organic solvent EC/EMC/DEC + 0.2% LiBF4 + 5.0% FEC + 1.0% VC + 3.00% SN + 1.0% PS + 1.0% SA (PANAX ETEC CO. , LTD.) by cylinder to have.

Separation membranes prepared in said in the embodiment and comparison for said interposed therebetween and a solid electrolyte between the positive electrode and the negative electrode assembly of 7 cm × 6.5 cm to wind onto the section. Said electrode assembly 3 seconds in 100 °C, 5kgf/cm² 1 under a pressure from pouch for coating of aluminum by pressing the difference (8 cm × 12 cm) between adjacent two edge paste has better mouth feeling and 143 °C after sealing to a temperature of said electrolyte 6.5g are input (sealing), the separator degassing machine 3 minute or more of the positive air pressure in the remaining sealing section. A cell manufactured said 12 time (aging) aging in 25 °C after 120 seconds in 110 °C, 20kgf/cm² under pressure of 2 difference was press. Furthermore, or comprising a negative electrode disconnect the cell isolation active materials of the anode is transferred to and area (lumenera yarn resolution camera) analyzer an Image to be same (Easy Measure converter 1.0.0.4) to transfer using computing light with the charge/discharge before transfer rate. Furthermore, said aging and said 2 difference after the pressing continues to electrode assembly 2 in 25 °C 12 time (aging) and aging difference 4.35V, 0.2C, 1 time which removes gases in a cell after pre-charge, below charging, the discharge and charge about an article which he/she embodiment predicts a after cell release the isolation active materials of the anode or the cathode area is transferred to the same rate transfer before discharging said measured charging current method light with the rate transfer after discharging same.

3 table said terminal as is, herein an acryl-based copolymer and a weight average molecular weight of 1,000,000 g/mol or more including vinylidene fluoride polymer in the embodiment 1 to 6 with adhesive layer charge/discharge in the case of isolation both rate transfer after and charge/discharge before 50% or more while good, weight average molecular weight of less than 1,000,000 g/mol vinylidene fluoride-based copolymer for comparison use with acrylic copolymer 3 to 1 e.g. in the case of 50% or more but the transfer before discharging, discharging after transfer rate was the channel estimation may be significantly degraded less than 50%. Furthermore, weight average molecular weight of less than 1,000,000 g/mol vinylidene fluoride-based homodyne use with acrylic copolymer polymer for comparison e.g. exceeds 7% is variable ratio of thickness of the case of 4 second before discharging only one time, after anode or cathode isolation layer is formed in both measurement of the index of transfer and was cannot be is.