SEPARATOR AND ELECTROCHEMICAL DEVICE INCLUDING THE SAME

A separator including: a porous polymer substrate having a plurality of pores; and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer comprises inorganic particles, core-shell type polymer particles having a core portion and a shell portion surrounding the core portion, and a binder polymer positioned on the whole or a part of the surface of the inorganic particles and core-shell type polymer particles to connect and fix the inorganic particles and core-shell type polymer particles with one another. The core portion has a glass transition temperature, Tg, higher than the shell portion in the core-shell type polymer particles. The ratio of the average diameter of the core-shell type polymer particles to the average diameter of the inorganic particles is 80% to 200%.

SEPARATOR AND ELECTROCHEMICAL DEVICE INCLUDING THE SAME

Disclosed are a separator and an electrochemical device including the same. The separator includes: a porous polymer substrate having a plurality of pores; a separator base including a porous coating layer formed on at least one surface of the porous polymer substrate, and including a plurality of inorganic particles and a binder polymer disposed partially or totally on the surface of the inorganic particles to connect and fix the inorganic particles with each other; and an adhesive porous layer formed on at least one surface of the separator base and including an adhesive resin which shows adhesive property through heating at a temperature lower than the melting point of the porous polymer substrate, wherein the adhesive porous layer is provided with a porous structure formed by phase separation caused by the evaporation rate of a solvent and that of a non-solvent, when applying and drying a coating composition including the adhesive resin, the solvent and the non-solvent on at least one surface of the separator base. 1. A separator , comprising:a porous polymer substrate having a plurality of pores;a separator base including a porous coating layer formed on at least one surface of the porous polymer substrate, said porous coating layer comprising a plurality of inorganic particles and a binder polymer disposed partially or totally on the surface of the inorganic particles to connect and fix the inorganic particles with each other; andan adhesive porous layer formed on at least one surface of the separator base, said adhesive porous layer comprising an adhesive resin which shows adhesive property through heating at a temperature lower than a melting point of the porous polymer substrate,wherein the adhesive porous layer is provided with a porous structure formed by phase separation caused by an evaporation rate of a solvent and that of a non-solvent, when applying and drying a coating composition including the adhesive resin, the solvent and the non-solvent on at ...

SEPARATOR FOR SECONDARY BATTERY, METHOD FOR MANUFACTURING THE SAME AND SECONDARY BATTERY INCLUDING THE SAME

A separator for a secondary battery, including a porous polymer substrate; a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer includes a plurality of inorganic particles and a first binder polymer that interconnects and fixes the inorganic particles; and an adhesive layer on a surface of the porous coating layer opposite to the porous polymer substrate. The adhesive layer includes a second binder polymer, and the adhesive layer includes a first layer in contact with the surface of the porous coating layer opposite to the porous polymer substrate, and a second layer integrated with the first layer and the second layer faces an electrode. The second layer has an average pore size larger than the average pore size of the first layer. The separator for a secondary battery can improve the problem related with resistance, while ensuring adhesion to an electrode.

SEPARATOR FOR SECONDARY BATTERY AND SECONDARY BATTERY INCLUDING THE SAME

A separator for a secondary battery, including: a porous polymer substrate having a plurality of pores; and a porous coating layer on at least one surface of the porous polymer substrate, the porous coating layer including a plurality of inorganic particles, a binder polymer and a urethane bond-containing crosslinked polymer. The binder polymer and the urethane bond-containing crosslinked polymer are on at least a part of the surface of the inorganic particles to connect and fix the inorganic particles with one another. The urethane bond-containing crosslinked polymer has a weight average molecular weight of 100,000-5,000,000, and the urethane bond-containing crosslinked polymer is present in an amount of 6 parts by weight to 60 parts by weight based on 100 parts by weight of the total weight of the binder polymer and the urethane bond-containing crosslinked polymer. 1. A separator for a secondary battery , comprising:a porous polymer substrate having a plurality of pores; anda porous coating layer on at least one surface of the porous polymer substrate, the porous coating layer comprising a plurality of inorganic particles, a binder polymer and a urethane bond-containing crosslinked polymer, wherein the binder polymer and the urethane bond-containing crosslinked polymer are on at least a part of a surface of the inorganic particles to connect and fix the inorganic particles with one another,the urethane bond-containing crosslinked polymer has a weight average molecular weight of 100,000 to 5,000,000, andthe urethane bond-containing crosslinked polymer is included in an amount of 6 parts by weight to 11-1160 parts by weight based on 100 parts by weight of a total weight of the binder polymer and the urethane bond-containing crosslinked polymer.2. The separator for the secondary battery according to claim 1 , wherein the urethane bond-containing crosslinked polymer has a weight average molecular weight in a range from 200 claim 1 ,000 to 4 claim 1 ,000 claim 1 ,000.3 ...

METHOD FOR MANUFACTURING SEPARATOR FOR ELECTROCHEMICAL DEVICE

A separator with improved heat resistance and low resistance as well as Lami Strength that is equal or similar to that of the existing separator by using a predetermined amount of polyvinylpyrrolidone binder polymer relative to a polyvinylidene fluoride-based binder polymer, and a manufacturing method thereof. 1. A method for manufacturing a separator for an electrochemical device , comprising:{'b': '1', '(S) preparing a first binder composition comprising a polyvinylpyrrolidone binder polymer dissolved in a first organic solvent;'}{'b': '2', '(S) preparing a second binder composition comprising a polyvinylidene fluoride-based binder polymer dissolved in a second organic solvent;'}{'b': '3', '(S) preparing a porous coating layer slurry comprising inorganic particles dispersed in a mixture of the first binder composition and the second binder composition; and'}{'b': '4', '(S) coating the porous coating layer slurry on at least one surface of a porous polymer substrate and drying the porous coating layer slurry to form a porous coating layer on the at least one surface of the porous polymer substrate,'}wherein a weight (A) of the polyvinylpyrrolidone binder polymer and a weight (B) of the polyvinylidene fluoride-based binder polymer satisfy a ratio of A/B≤1,wherein the polyvinylidene fluoride-based binder polymer is not soluble in the first organic solvent, anda weight ratio of the first organic solvent to the second organic solvent is 5:95 to 30:70.2. The method for manufacturing the separator for the electrochemical device according to claim 1 , wherein a boiling point of the first organic solvent is higher than a boiling point of the second organic solvent.3. The method for manufacturing the separator for the electrochemical device according to claim 1 , wherein a boiling point of the first organic solvent is 60° C. to 100° C.4. The method for manufacturing the separator for the electrochemical device according to claim 1 , wherein the first organic solvent ...

SEPARATOR FOR LITHIUM SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

A separator for an electrochemical device having a porous polymer substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous polymer substrate. The porous coating layer comprises a dispersing agent a mixture of inorganic particles and a particle-type binder polymer; and a polyvinyl pyrrolidone binder polymer positioned on the whole or a part of the surface of the inorganic particles in the mixture of the porous coating layer to connect and fix the inorganic particles with one another. The content of the polyvinyl pyrrolidone binder polymer is 2 to 20 parts by weight based on 100 parts by weight of the total content of tire particle-type binder polymer and the polyvinyl pyrrolidone binder polymer. The separator has low resistance and a Lami strength equivalent or similar to the Lami strength of conventional separators without surface-treatment of a porous polymer substrate. 1. A separator for a lithium secondary battery , comprising:a porous polymer substrate having a plurality of pores; anda porous coating layer formed on at least one surface of the porous polymer substrate, the porous coating layer comprising a dispersing agent, a mixture of inorganic particles and a particle-type binder polymer, and a polyvinyl pyrrolidone binder polymer positioned on a whole or a part of a surface of the inorganic particles in the mixture of the porous coating layer to connect and fix the inorganic particles with one another,wherein a content of the polyvinyl pyrrolidone binder polymer is 2 parts by weight to 20 parts by weight based on 100 parts by weight of a total content of the particle-type binder polymer and the polyvinyl pyrrolidone binder polymer, andwherein the polyvinyl pyrrolidone binder polymer has a K-value of 60 to 130.2. The separator for a lithium secondary battery according to claim 1 , wherein the content of the polyvinyl pyrrolidone binder polymer is 4.66 parts by weight to 18.66 parts by weight based on 100 ...

REVERSE OSMOSIS MEMBRANE

There is provided a reverse osmosis membrane including a porous support; a polysulfone layer formed on the porous support and having pores formed in a surface thereof, pores having a diameter of 40 nm or greater accounting for less than 0.5% of total pores; and an active layer. 1. A reverse osmosis membrane , comprising:a porous support;a polysulfone layer formed on the porous support and having pores formed in a surface thereof, pores having a diameter of 40 nm or greater accounting for less than 0.5% of total pores; andan active layer.2. The reverse osmosis membrane of claim 1 , wherein a total area of the pores formed in the surface of the polysulfone layer accounts for 1% to 20% of a total area of the surface of the polysulfone layer.3. The reverse osmosis membrane of claim 1 , wherein the pores formed in the surface of the polysulfone layer have an average diameter of 8.0 nm to 10.0 nm.4. The reverse osmosis membrane of claim 1 , wherein the pores formed in the surface of the polysulfone layer is formed by using a solution including a mixed solvent containing two or more solvents having different solubility parameter values.5. The reverse osmosis membrane of claim 4 , wherein the solution comprises:a polymer having a sulfonic acid group in an amount of 5 to 45 parts by weight, based on 100 parts by weight of the solution; andthe mixed solvent containing two or more solvents in an amount of 55 to 95 parts by weight, based on 100 parts by weight of the solution.6. The reverse osmosis membrane of claim 4 , wherein the two or more solvents included in the mixed solvent have a difference in solubility parameter values therebetween of 0.1 to 15.7. The reverse osmosis membrane of claim 4 , wherein the mixed solvent includes two or more solvents selected from the group consisting of dimethylacetamide claim 4 , methyl acetate claim 4 , hydrazine claim 4 , trichloromethane claim 4 , diiodomethane claim 4 , trichloroethylene claim 4 , styrene claim 4 , 2-butanone claim 4 ...

POLYAMIDE WATER-TREATMENT SEPARATION MEMBRANE WITH IMPROVED ANTIFOULING PROPERTIES AND MANUFACTURING METHOD THEREOF

A water-treatment separation membrane with good antifouling properties includes a support having pores, a polyamide layer formed on the support, and a passivation layer comprising specific materials formed on the polyamide layer. 5. The water-treatment separation membrane of claim 1 , wherein the compound represented by formula (I) is grafted to the polyamide layer.7. The method of claim 6 , wherein forming the passivation layer comprises impregnating the support including the polyamide layer formed thereon with an aqueous solution including the compound represented by formula (I).8. The method of claim 6 , wherein forming the water treatment separation membrane comprises exposing the support to an aqueous solution including the compound represented by formula (I) claim 6 , and the aqueous solution includes 0.01 to 10 wt % of the compound represented by formula (I).12. The method of claim 6 , wherein the compound represented by formula (I) is grafted to the polyamide layer.13. A water-treatment module comprising the water-treatment separation membrane according to .14. A water-treatment apparatus comprising the water-treatment module of . This application claims the priority to Korean Patent Application Nos. 10-2012-0124487 filed on Nov. 5, 2012 and 10-2013-0108427 filed on Sep. 10, 2013, in the Korean Intellectual Property Office, as well as PCT/KR2013/008183, the disclosures of which are incorporated herein by reference.Embodiments of the present invention relate to a polyamide water-treatment separation membrane and a manufacturing method thereof, and more particularly, to a polyamide water-treatment separation membrane having improved antifouling properties with a coating layer including a specific compound formed on a polyamide membrane, and a manufacturing method thereof.Osmosis occurs when two solutions of different concentration are isolated by a semi-permeable membrane and solvent flows from a solution having a lower concentration of solute to another ...

A SEPARATOR FOR ELECTROCHEMICAL DEVICE AND AN ELECTROCHEMICAL DEVICE COMPRISING THE SAME

A separator for an electrochemical device and an electrochemical device comprising the same. The separator comprises a porous polymer substrate and a heat resistant coating layer on at least one surface of the porous polymer substrate. The heat resistant coating layer is a porous polymer layer having pores, and comprises a polyvinyl pyrrolidone-based polymer and a polyvinylidene fluoride (PVDF)-based polymer.

SEPARATOR FOR ELECTROCHEMICAL DEVICE AND ELECTROCHEMICAL DEVICE COMPRISING SAME

A method for manufacturing a separator for an electrochemical device which uses polyvinyl pyrrolidone (PVP) as a dispersing agent, and provides high dispersibility of particles and prevents aggregation of particles, even when inorganic particles having a small particle diameter is used in slurry for forming a porous coating layer. Therefore, the inorganic particles are distributed homogeneously in the porous coating layer of a finished separator. In addition, since PVP is used with a fluorinated binder resin, the separator shows improved peel strength and adhesion to an electrode. Further, a non-solvent ingredient for the fluorinated binder resin is used as a solvent for PVP, and a non-solvent ingredient for PVP is used as a solvent for the fluorinated binder resin.

SEPARATOR AND ELECTROCHEMICAL DEVICE CONTAINING THE SAME

A separator and an electrochemical device including the same. The separator includes an adhesive layer including first adhesive resin particles having an average particle diameter corresponding to 0.8-3 times of an average particle diameter of the inorganic particles and second adhesive resin particles having an average particle diameter corresponding to 0.2-0.6 times of the average particle diameter of the inorganic particles, wherein the first adhesive resin particles are present in an amount of 30-90 wt % based on a total weight of the first adhesive resin particles and the second adhesive resin particles. The separator shows improved adhesion to an electrode and provides an electrochemical device with decreased increment in resistance after lamination with an electrode. 1. A separator for an electrochemical device which comprises:a porous polymer substrate having pores;a porous coating layer present on at least one surface of the porous polymer substrate, and comprising inorganic particles and a binder polymer disposed partially or totally on a surface of the inorganic particles, wherein the binder polymer connects and fixes the inorganic particles with each other; andan adhesive layer present on a surface of the porous coating layer, and comprising first adhesive resin particles having an average particle diameter corresponding to 0.8-3 times of an average particle diameter of the inorganic particles and second adhesive resin particles having an average particle diameter corresponding to 0.2-0.6 times of the average particle diameter of the inorganic particles, wherein the first adhesive resin particles are present in an amount of 30-90 wt % based on a total weight of the first adhesive resin particles and the second adhesive resin particles.2. The separator for an electrochemical device according to claim 1 , wherein the average particle diameter of the inorganic particles is 100-700 nm.3. The separator for an electrochemical device according to claim 1 , ...

SEPARATOR AND ELECTROCHEMICAL DEVICE COMPRISING SAME

A separator which includes: a porous polymer substrate having a plurality of pores; a separator base including a porous coating layer formed on at least one surface of the porous polymer substrate; and an adhesive layer formed on at least one surface of the separator base, said adhesive layer comprising a plurality of second inorganic particles and adhesive resin particles, wherein the weight ratio of the second inorganic particles to the adhesive resin particles is 5:95-60:40, and the diameter of the adhesive resin particles is 1.1-3.5 times the diameter of the second inorganic particles. An electrochemical device including the separator is also disclosed. The separator shows improved adhesion between an electrode and the separator, maintains the pores of the adhesive layer even after a process of electrode lamination, and improves the resistance of an electrochemical device. 1. A separator comprising:a porous polymer substrate having a plurality of pores;a separator base formed on at least one surface of the porous polymer substrate, said separator base comprising a porous coating layer comprising a plurality of first inorganic particles and a binder polymer positioned on a whole or a part of a surface of the first inorganic particles to connect and fix the first inorganic particles with each other; andan adhesive layer formed on at least one surface of the separator base, said adhesive layer comprising a plurality of second inorganic particles and adhesive resin particles,wherein a weight ratio of the second inorganic particles to the adhesive resin particles is 5:95-60:40, anda diameter of the adhesive resin particles is 1.1-3.5 times a diameter of the second inorganic particles.2. The separator according to claim 1 , wherein the diameter of the adhesive resin particles is 1.2-3 times the diameter of the second inorganic particles.3. The separator according to . wherein the diameter of the adhesive resin particles is 1.2-1.3 times the diameter of the second ...

SEPARATOR FOR ELECTROCHEMICAL DEVICE AND METHOD FOR MANUFACTURING THE SAME

A separator for an electrochemical device. The separator includes a porous coating layer formed from an acid, which is crosslinkable. As a result, the separator has increased heat resistance, safety and physical strength, shows improved peel strength between the porous substrate and the porous coating layer, and prevents separation of the inorganic particles from the porous coating layer. In addition, the separator shows an improved crosslinking degree so that the added amount of a crosslinkable binder resin may be reduced. Thus, it is possible to increase the added amount of a non-crosslinkable resin, inorganic particles, or both. Even when using a small amount of a crosslinkable binder resin, it is possible to provide both an effect of improving heat resistance and an effect of improving adhesion.

METHOD OF MANUFACTURING REVERSE OSMOSIS MEMBRANE, AND REVERSE OSMOSIS MEMBRANE MANUFACTURED THEREBY

There are provided a method of manufacturing a reverse osmosis membrane and a reverse osmosis membrane manufactured thereby. The method includes forming a polysulfone layer by applying a solution including a mixed solvent containing two or more solvents having different solubility parameter values to a surface of a porous support; and forming an active layer on the polysulfone layer. 1. A method of manufacturing a reverse osmosis membrane , the method comprising:forming a polysulfone layer by applying a solution including a mixed solvent containing two or more solvents having different solubility parameter values to a surface of a porous support; andforming an active layer on the polysulfone layer.2. The method of claim 1 , wherein the solution comprises:a polymer having a sulfonic acid group in an amount of 5 to 45 parts by weight, based on 100 parts by weight of the solution; andthe mixed solvent containing two or more solvents having different solubility parameter values in an amount of 55 to 95 parts by weight, based on 100 parts by weight of the solution.3. The method of claim 1 , wherein the two or more solvents included in the mixed solvent have a difference in solubility parameter values therebetween of 0.1 to 15.4. The method of claim 1 , wherein the mixed solvent includes a first solvent having a solubility parameter value of 21 (J/cm)to 30 (J/cm)and a second solvent having a solubility parameter value different from that of the first solvent by 0.1 to 15 claim 1 , the first solvent and the second solvent being mixed in a ratio of 95:5 to 50:50.5. The method of claim 1 , wherein the mixed solvent includes two or more solvents selected from the group consisting of dimethylacetamide claim 1 , methyl acetate claim 1 , hydrazine claim 1 , trichloromethane claim 1 , diiodomethane claim 1 , trichloroethylene claim 1 , styrene claim 1 , 2-butanone claim 1 , tetrahydrofuran claim 1 , cyclohexanone claim 1 , acetone claim 1 , benzonitrile claim 1 , isophorone claim ...

SEPARATOR FOR ELECTROCHEMICAL DEVICE AND ELECTROCHEMICAL DEVICE CONTAINING SAME

A separator for an electrochemical device, including: a porous polymer substrate having a plurality of pores; and a porous coating layer on at least one surface of the porous polymer substrate, wherein the porous coating layer comprises boehmite particles and a binder polymer, wherein the binder polymer is positioned on at least a part of the surface of the boehmite particles and connects and fixes the boehmite particles with one another. The boehmite particles have an average particle diameter of 2.0 μm to 3.5 μm and a specific surface area of 4.0 m2/g to 4.5 m2/g, and one side of the porous coating layer has a thickness of 2 μm to 10 μm.

SEPARATOR AND ELECTROCHEMICAL DEVICE CONTAINING THE SAME

A separator and an electrochemical device including the same. The separator includes an adhesive layer including first adhesive resin particles having an average particle diameter corresponding to 0.8-3 times of an average particle diameter of the inorganic particles and second adhesive resin particles having an average particle diameter corresponding to 0.2-0.6 times of the average particle diameter of the inorganic particles, wherein the first adhesive resin particles are present in an amount of 30-90 wt % based on a total weight of the first adhesive resin particles and the second adhesive resin particles. The separator shows improved adhesion to an electrode and provides an electrochemical device with decreased increment in resistance after lamination with an electrode.

SEPARATOR FOR LITHIUM SECONDARY BATTERY AND MANUFACTURING METHOD THEREFOR

A separator for a lithium secondary battery manufacturing method thereof including a porous polymer substrate, and a porous coating layer formed on at least one surface of the porous polymer substrate, wherein the porous coating layer includes inorganic particles, a polyvinylidene fluoride-based binder polymer, a polyvinylpyrrolidone binder polymer and a dispersant. The polyvinylidene fluoride-based binder polymer and the polyvinylpyrrolidone binder polymer are not particles and coat part or all of a surface of the inorganic particles. The polyvinylidene fluoride-based binder polymer has a predetermined molecular weight and amount. The separator has improved heat resistance as well as Lami Strength that is equal to or similar to that of the existing separator.

SEPARATOR AND ELECTROCHEMICAL DEVICE COMPRISING SAME

A separator which includes: a porous polymer substrate having a plurality of pores; a separator base including a porous coating layer formed on at least one surface of the porous polymer substrate; and an adhesive layer formed on at least one surface of the separator base, said adhesive layer comprising a plurality of second inorganic particles and adhesive resin particles, wherein the weight ratio of the second inorganic particles to the adhesive resin particles is 5:95-60:40, and the diameter of the adhesive resin particles is 1.1-3.5 times the diameter of the second inorganic particles. An electrochemical device including the separator is also disclosed. The separator shows improved adhesion between an electrode and the separator, maintains the pores of the adhesive layer even after a process of electrode lamination, and improves the resistance of an electrochemical device.

SEPARATOR HAVING ELECTRODE ADHESIVE LAYER AND ELECTROCHEMICAL DEVICE INCLUDING THE SAME

Disclosed are a separator having an electrode adhesive layer and an electrochemical device including the same. The electrode adhesive layer includes organic particles and an acrylic resin binder. Preferably, the acrylic resin binder is present in an amount of 30 wt % or more, so that a film-shaped electrode adhesive layer can be formed even when the organic particles have a particle diameter smaller than that of the pores of the underlying substrate or voids of the underlying porous coating layer. 1. A separator for an electrochemical device , comprising: a porous polymer substrate; and an electrode adhesive layer formed on at least one surface of the porous polymer substrate and including organic particles and an acrylic resin binder.2. The separator for an electrochemical device according to claim 1 , comprising a porous coating layer formed on at least one surface of the porous polymer substrate and including inorganic particles and a binder polymer said porous coating layer being present between the porous polymer substrate and the electrode adhesive layer claim 1 , which electrode adhesive layer is formed on the outermost surface of the separator.3. The separator for an electrochemical device according to claim 1 , wherein the organic particles have an average diameter smaller than that of the pores formed in the porous polymer substrate or porous coating layer located directly under the electrode adhesive layer.4. The separator for an electrochemical device according to claim 1 , wherein the acrylic resin binder is present in an amount of 30-80 wt % based on the combined weight of the organic particles and the acrylic resin binder.5. The separator for an electrochemical device according to claim 1 , wherein the organic particles are any one or at least two polymers or copolymers selected from the group consisting of polyvinylidene fluoride claim 1 , polyvinylidene fluoride-co-hexafluoropropylene claim 1 , polyvinylidene fluoride-co-trichloroethylene claim 1 , ...

SEPARATOR FOR ELECTROCHEMICAL DEVICE, AND ELECTROCHEMICAL DEVICE COMPRISING SAME

A separator for an electrochemical device having a low content of secondary particles formed by aggregation of inorganic particles in the inorganic coating layer. The separator has a low content of secondary particles protruding from the separator surface to a predetermined height. Since the inorganic particles are not aggregated but are distributed homogeneously in the inorganic coating layer, the separator has uniform dispersion of pressure over the whole surface of the separator, when it is applied to a battery and pressure is generated in the battery due to the charge/discharge of the battery. Deformation of the separator is minimized. When using a porous film as a separator substrate, there is a low tendency for intensive application of pressure from the secondary particles to a local site of the separator substrate, and thus the separator substrate is less damaged and the possibility of short-circuit generation is reduced.

SEPARATOR FOR SECONDARY BATTERY INCLUDING ADHESIVE LAYER AND METHOD FOR MANUFACTURING THE SAME

A separator including a coating layer on the surface of a porous separator substrate, wherein the coating layer has a porous structure derived from the interstitial volumes between the inorganic particles, and thus the separator has suitable porosity and a sufficient degree of electrolyte retention. Further, since the separator includes the inorganic coating layer on the surface of the porous separator substrate, the separator ensures heat resistance and is prevented from shrinking, even when the internal temperature of a battery is increased. A method for manufacturing a separator including forming the coating layer and the electrode adhesive portion on the coating layer through a single step using the density of inorganic particles and that of binder resin particles, and thus has an advantage in terms of convenience of processing.

METHOD OF MANUFACTURING REVERSE OSMOSIS MEMBRANE, AND REVERSE OSMOSIS MEMBRANE MANUFACTURED THEREBY

There are provided a method of manufacturing a reverse osmosis membrane and a reverse osmosis membrane manufactured thereby. The method includes forming a polysulfone layer by applying a solution including a mixed solvent containing two or more solvents having different solubility parameter values to a surface of a porous support; and forming an active layer on the polysulfone layer.

SEPARATOR FOR SECONDARY BATTERY, MANUFACTURING METHOD THEREOF, METHOD FOR MANUFACTURING SECONDARY BATTERY COMPRISING THE SEPARATOR AND SECONDARY BATTERY MANUFACTURED BY THE METHOD

The present disclosure relates to a separator for a secondary battery comprising a porous polymer substrate; a first layer formed on at least one surface of the porous polymer substrate, and comprising inorganic particles and a nonparticulate acrylic polymer having a glass transition temperature of 15° C. or less, wherein the nonparticulate acrylic polymer connects and fixes the inorganic particles; and a second layer formed on an upper surface of the first layer, and comprising a particulate acrylic polymer having a glass transition temperature of 20° C. to 50° C. The separator for a secondary battery according to the present disclosure has good adhesion with electrode and can solve the resistance problem in the presence of the inorganic particles.

METHOD FOR MANUFACTURING SEPARATOR, SEPARATOR FORMED THEREBY, AND ELECTROCHEMICAL DEVICE INCLUDING SAME

A method for manufacturing a separator, including the steps of: (S1) preparing a pre-dispersion including inorganic particles dispersed in a pre-dispersion solvent and a first binder polymer dissolved in the pre-dispersion solvent; (S2) conducting a preliminary milling of the pre-dispersion; (S3) preparing a binder polymer solution including a second binder polymer dissolved in a binder polymer solution solvent; (S4) mixing the pre-dispersion with the binder polymer solution and carrying out a secondary milling to obtain a slurry for forming a porous coating layer; and (S5) applying the slurry to at least one surface of a porous polymer substrate, followed by drying, is disclosed. A separator obtained by the method and an electrochemical device including the same are also disclosed. According to the present disclosure, it is possible to provide a separator having a uniform surface and showing improved adhesion. 1. A method for manufacturing a separator , comprising the steps of:(S1) preparing a pre-dispersion comprising inorganic particles dispersed in a pre-dispersion solvent and a first binder polymer dissolved in the pre-dispersion solvent;(S2) conducting a preliminary milling of the pre-dispersion;(S3) preparing a binder polymer solution comprising a second binder polymer dissolved in a binder polymer solution solvent, wherein a weight ratio of the first binder polymer to the second binder polymer is 0.5:99.5-10:90;(S4) mixing the pre-dispersion with the binder polymer solution and carrying out a secondary milling to obtain a slurry for forming a porous coating layer, wherein a time of the secondary milling is 30-99% of a sum of a time of the preliminary milling with the time of the secondary milling; and(S5) applying the slurry to at least one surface of a porous polymer substrate, followed by drying.2. The method for preparing a separator according to claim 1 , wherein the sum of the time of the preliminary milling with the time of the secondary milling is 2-6 ...

SEPARATOR FABRICATION METHOD, SEPARATOR FABRICATED THEREBY, AND ELECTROCHEMICAL ELEMENT COMPRISING SAME SEPARATOR

A method for manufacturing a separator, including the steps of: (S) preparing a dispersion containing inorganic particles dispersed in a first solvent and a first binder polymer dissolved in the first solvent; (S) preparing a binder polymer solution containing a second binder polymer dissolved in a second solvent, and mixing the binder polymer solution with the dispersion so that a combined weight of the inorganic particles and the first binder polymer in the dispersion may be 1.5-8 times of a weight of the second binder polymer in the binder polymer solution; and (S) applying the resultant mixture to at least one surface of a porous polymer substrate, followed by drying, to form a porous coating layer on the porous polymer substrate. Also, a separator obtained by the method and an electrochemical device including the same. 1. A method for manufacturing a separator , comprising the steps of:{'b': '1', '(S) preparing a dispersion comprising inorganic particles (A) dispersed in a first solvent and a first binder polymer (B) dissolved in the first solvent;'}{'b': '2', '(S) preparing a binder polymer solution comprising a second binder polymer (C) dissolved in a second solvent, and mixing the binder polymer solution with the dispersion wherein a ratio of (A+B)/C, which is the ratio of a combined weight of the inorganic particles (A) and the first binder polymer (B) in the dispersion to a weight of the second binder polymer (C) in the binder polymer solution is 1.5-8, thereby providing a slurry for forming a porous coating layer; and'}{'b': '3', '(S) applying the slurry for forming the porous coating layer to at least one surface of a porous polymer substrate, followed by drying, to form a porous coating layer on the porous polymer substrate.'}2. The method for manufacturing a separator according to claim 1 , wherein the ratio of (A+B)/C is 2.3-4.3.3. The method for manufacturing a separator according to claim 1 , wherein each of the first binder polymer (B) and the ...

SEPARATOR FOR SECONDARY BATTERY AND SECONDARY BATTERY INCLUDING THE SAME

A separator for a secondary battery, including: a porous polymer substrate having a plurality of pores; and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer includes a plurality of inorganic particles and a urethane bond-containing crosslinked polymer. The urethane bond-containing crosslinked polymer is present partially or totally on surfaces of the inorganic particles wherein the inorganic particles are interconnected and fixed. The urethane bond-containing crosslinked polymer has a glass transition temperature (Tg) of −15 to 32° C. A secondary battery including the separator is also disclosed.

REVERSE OSMOSIS MEMBRANE

There is provided a reverse osmosis membrane including a porous support; a polysulfone layer formed on the porous support and having pores formed in a surface thereof, pores having a diameter of 40 nm or greater accounting for less than 0.5% of total pores; and an active layer. 1. A reverse osmosis membrane , comprising:a porous support;a polysulfone layer formed on the porous support and having pores formed in a surface thereof, pores having a diameter of 40 nm or greater accounting for less than 0.5% of total pores; andan active layer.2. The reverse osmosis membrane of claim 1 , wherein a total area of the pores formed in the surface of the polysulfone layer accounts for 1% to 20% of a total area of the surface of the polysulfone layer.3. The reverse osmosis membrane of claim 1 , wherein the pores formed in the surface of the polysulfone layer have an average diameter of 8.0 nm to 10.0 nm.4. The reverse osmosis membrane of claim 1 , wherein the pores formed in the surface of the polysulfone layer is formed by using a solution including a mixed solvent containing two or more solvents having different solubility parameter values.5. The reverse osmosis membrane of claim 4 , wherein the solution comprises:a polymer having a sulfonic acid group in an amount of 5 to 45 parts by weight, based on 100 parts by weight of the solution; andthe mixed solvent containing two or more solvents in an amount of 55 to 95 parts by weight, based on 100 parts by weight of the solution.6. The reverse osmosis membrane of claim 4 , wherein the two or more solvents included in the mixed solvent have a difference in solubility parameter values therebetween of 0.1 to 15.7. The reverse osmosis membrane of claim 4 , wherein the mixed solvent includes two or more solvents selected from the group consisting of dimethylacetamide claim 4 , methyl acetate claim 4 , hydrazine claim 4 , trichloromethane claim 4 , diiodomethane claim 4 , trichloroethylene claim 4 , styrene claim 4 , 2-butanone claim 4 ...

GAS SEPARATION USING MEMBRANES COMPRISING POLYBENZOXAZOLES PREPARED BY THERMAL REARRANGEMENT

A method of separating components of a gas mixture, the method comprising: passing the gas mixture through a benzoxazole-based polymer membrane at a temperature of from about 30° C. to about 400° C., wherein the benzoxazole-based polymer membrane is represented by the formula: 12. The gas separation membrane of claim 11 , wherein the polybenzoxazole has a weight average molecular weight of from more than about 50 claim 11 ,000 Da to about 200 claim 11 ,000 Da.13. The method of wherein the gas mixture is passed through the benzoxazole-based polymer membrane at a temperature of from about 200° C. to about 350° C.14. The method of wherein the gas mixture is passed through the benzoxazole-based polymer membrane at a temperature of from about 200° C. to about 350° C. This application is a continuation-in-part of U.S. application Ser. No. 12/921,980, filed on Mar. 13, 2008, the disclosure of which is incorporated herein by reference in its entirety.The present invention relates to a method for preparing a benzoxazole-based polymer by thermal rearrangement which is performed by a simple process and induces thermal rearrangement at relatively lower thermal conversion temperatures to prepare a benzoxazole-based polymer suited for application to gas separation membranes, in particular, to gas separation membranes for small gases, the benzoxazole-based polymer prepared by the method and a gas separation membrane comprising the benzoxazole-based polymer.Free-volume elements in soft organic materials have been focused upon to improve membrane separation performance in chemical products as well as for energy conversion and storage applications [P. M. Budd, N. B. McKeown, D. Fritsch, Polymers with cavities tuned for fast selective transport of small molecules and ions, 2005, 15, 1977; W. J. Koros, Fleming G. K., Membrane-based gas separation, 1993, 83, 1; S. A. Stern, Polymers for gas separations: The next decade, 1994, 94, 1].The free volume element size and distribution play a ...

ELECTRODE ASSEMBLY, MANUFACTURING METHOD THEREOF, AND RECHARGEABLE BATTERY

There is provided a manufacturing method of an electrode assembly, the method including blanking a first electrode from a first base including a first coated region and a first uncoated region, blanking a second electrode from a second base including a second coated region and a second uncoated region, laminating a separator on the second electrode, cutting the laminated second electrode with the separator, and stacking the laminated second electrode and the first electrode. 1. A manufacturing method of an electrode assembly , the method comprising:blanking a first electrode from a first base comprising a first coated region and a first uncoated region;blanking a second electrode from a second base comprising a second coated region and a second uncoated region;laminating a separator on the second electrode;cutting the laminated second electrode with the separator; andstacking the laminated second electrode and the first electrode.2. The manufacturing method of the electrode assembly of claim 1 , wherein the blanking of the second electrode comprises:notching the second base such that some of the second base is connected; andcutting the notched second base to the second electrode before feeding the notched second base between the separator.3. The manufacturing method of the electrode assembly of claim 2 , wherein the laminating of the separator comprises continuously laminating two separators on opposite surfaces of the cut second electrode with a gap therebetween.4. The manufacturing method of the electrode assembly of claim 3 , wherein the cutting of the laminated second electrode comprises cutting the gap so that the cut separator protrudes out of the second electrode.5. The manufacturing method of the electrode assembly of claim 3 , wherein the cutting of the laminated second electrode comprises cutting the separator to correspond to an atypical shape of the second electrode when the second electrode is formed in the atypical shape.6. The manufacturing method of ...

Rechargeable battery

A rechargeable battery includes an electrode assembly, a pouch accommodating the electrode assembly, and including first and second exterior members facing each other with the electrode assembly therebetween, and a sealing portion having a sealing width and sealing the first exterior member and the second exterior member along an outer edge of the electrode assembly, and lead tabs electrically connected to the electrode assembly and drawn to the outside of the pouch, wherein the sealing portions define grooves, each of the grooves having a size that is less than the sealing width, and wherein the sealing portion is bent along the outer edge of the electrode assembly and attached to a side surface of the pouch.

RECHARGEABLE BATTERY

A rechargeable battery includes: an electrode assembly configured to charge and discharge a current; a pouch accommodating the electrode assembly; and a lead tab electrically connected to the electrode assembly. The pouch includes, when viewed in plan view, a first straight line portion and a second straight line portion that is longer than the first straight line portion, and the lead tab is drawn out through the first straight line 1. A rechargeable battery comprising:an electrode assembly configured to charge and discharge a current;a pouch accommodating the electrode assembly, the pouch comprising, when viewed in plan view, a first straight line portion and a second straight line portion that is longer than the first straight line portion; anda lead tab electrically connected to the electrode assembly and drawn out through the first straight line portion of the pouch.2. The rechargeable battery of claim 1 , wherein the electrode assembly comprises a first straight line electrode portion and a second straight line electrode portion that respectively correspond to the first straight line portion and the second straight line portion.3. The rechargeable battery of claim 2 , wherein the lead tab is connected to the electrode assembly at the first straight line electrode portion.4. The rechargeable battery of claim 3 , wherein the pouch comprises a terrace portion in the first straight line portion through which the lead tab is drawn out.5. The rechargeable battery of claim 4 , wherein the first straight line portion of the pouch and the first straight line electrode portion of the electrode assembly have a space therebetween which partially accommodates the lead tab.6. The rechargeable battery of claim 1 , wherein when viewed in plan view claim 1 , the first straight line portion and the second straight line portion of the pouch are directly connected to each other at one end of the first and second straight line portions claim 1 , andwherein the first straight line ...

BATTERY SEPARATOR INCLUDING FUNCTIONAL BINDER AND ELECTROCHEMICAL DEVICE COMPRISING THE SAME

A functional binder and a separator including the functional binder, in which the separator includes a porous polyolefin substrate and an organic-inorganic hybrid porous coating layer formed on at least one surface of the substrate and configured to include a mixture of inorganic particles and a binder compound, thus increasing binder-inorganic material adhesion and substrate-binder adhesion while preventing internal shorting from occurring by performing self-healing of damage to the separator, enhancing the adhesion of the separator to a cathode and an anode, and withstanding the dissolution of a transition metal of a cathode material. The binder contains 10 wt % or more of a hydroxyl group per molecule thereof. 1. A battery separator , comprising:(a) a polyolefin-based substrate; and(b) an active layer comprising a mixture of inorganic particles and a binder, wherein the inorganic particles in the active layer are connected and fixed to each other by the binder, and a porous structure is formed due to an interstitial volume between the inorganic particles,wherein the active layer is present as a coating on at least one region selected from the group consisting of (a) a surface of the substrate, and (b) a portion of pores in the substrate, andthe binder contains 10 wt % or more of a hydroxyl group per molecule thereof.2. The battery separator of claim 1 , wherein the binder includes at least one selected from among tannic acid claim 1 , pyrogallic acid claim 1 , amylose claim 1 , amylopectin claim 1 , and xanthan gum.3. The battery separator of claim 1 , wherein the binder is a mixture of1) at least one selected from among tannic acid, pyrogallic acid, amylose, amylopectin, and xanthan gum, and2) at least one selected from among polyvinylidene fluoride-co-hexafluoropropylene, polyvinylidene fluoride-co-trichloroethylene, polymethylmethacrylate, polyacrylonitrile, polyvinylpyrrolidone, polyvinylacetate, polyethylene-co-vinyl acetate, polyethylene oxide, cellulose ...

Separator for electrochemical device and electrochemical device containing same

Provided is a separator for an electrochemical device, including: a porous polymer substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous polymer substrate, and containing boehmite particles and a binder polymer positioned on the whole or a part of the surface of the boehmite particles to connect the boehmite particles with one another and fix them, wherein the boehmite particles have an average particle diameter of 2.0-3.5 µm and a specific surface area of 4.0-4.5 m 2 /g, and one side of the porous coating layer has a thickness of 2-10 µm.

Reverse osmosis membrane

There is provided a reverse osmosis membrane including a porous support; a polysulfone layer formed on the porous support and having pores formed in a surface thereof, pores having a diameter of 40 nm or greater accounting for less than 0.5% of total pores; and an active layer.

Separator and electrochemical device comprising same

A separator which includes: a porous polymer substrate having a plurality of pores; a separator base including a porous coating layer formed on at least one surface of the porous polymer substrate; and an adhesive layer formed on at least one surface of the separator base, said adhesive layer comprising a plurality of second inorganic particles and adhesive resin particles, wherein the weight ratio of the second inorganic particles to the adhesive resin particles is 5:95-60:40, and the diameter of the adhesive resin particles is 1.1-3.5 times the diameter of the second inorganic particles. An electrochemical device including the separator is also disclosed. The separator shows improved adhesion between an electrode and the separator, maintains the pores of the adhesive layer even after a process of electrode lamination, and improves the resistance of an electrochemical device.

Separator and electrochemical device including the same

Disclosed are a separator and an electrochemical device including the same. The separator includes: a porous polymer substrate having a plurality of pores; a separator base including a porous coating layer formed on at least one surface of the porous polymer substrate, and including a plurality of inorganic particles and a binder polymer disposed partially or totally on the surface of the inorganic particles to connect and fix the inorganic particles with each other; and an adhesive porous layer formed on at least one surface of the separator base and including an adhesive resin which shows adhesive property through heating at a temperature lower than the melting point of the porous polymer substrate, wherein the adhesive porous layer is provided with a porous structure formed by phase separation caused by the evaporation rate of a solvent and that of a non-solvent, when applying and drying a coating composition including the adhesive resin, the solvent and the non-solvent on at least one surface of the separator base.

Water-treatment separation membrane comprising ionic exchange polymer layer and method for forming same

Preparation method for separator for electrochemical device and separator for electrochemical device prepared by same preparation method

Disclosed is a separator for an electrochemical device. The separator has an electrode adhesive layer, and two types of solvents are used when coating the electrode adhesive layer, wherein the ratio of polarity of the solvents is used to induce a beta crystal phase of the second binder resin, and thus a uniform porous structure is formed to provide an improved lithium-ion conduction path. In this manner, even when the adhesive layer is formed on the separator, the separator does not cause an increase in resistance.

Separator fabrication method, separator fabricated thereby, and electrochemical element comprising same separator

Separator and electrochemical device containing the same

Separation membrane for electrochemical device, and method for manufacturing same

Separator for electrochemical device and electrochemical device containing same

Separator comprising cmc, particulate binder, and soluble binder

Disclosed is a separator for secondary batteries configured such that a coating layer is applied to one surface or opposite surfaces of a separator substrate made of a polyolefin-based polymer resin having a porous structure, the coating layer includes carboxymethyl cellulose (CMC), serving as a thickener, a filler, a particle-type binder, and a dissolution-type binder, and an amount of the particle-type binder is greater than an amount of the dissolution-type binder.

All-solid lithium secondary battery and preparation method thereof

The present disclosure relates to an all-solid lithium secondary battery and a preparation method thereof, wherein the all-solid lithium secondary battery includes a positive electrode active material layer, a negative electrode active material layer, and a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer, wherein the negative electrode active material layer includes a carbon structure and silver nanoparticles, the carbon structure includes a structure in which a plurality of graphene sheets are connected to each other, and the plurality of graphene sheets include two or more graphene sheets having different plane directions.

Manufacture method of electrode assembly

Separator for electrochemical device, and electrochemical device comprising same

Separator and electrochemical device including the same

A separator including: a porous polymer substrate having a plurality of pores; and a porous coating layer on at least one surface of the porous polymer substrate. The porous coating layer comprises inorganic particles, core-shell type polymer particles having a core portion and a shell portion surrounding the core portion, and a binder polymer positioned on the whole or a part of the surface of the inorganic particles and core-shell type polymer particles to connect and fix the inorganic particles and core-shell type polymer particles with one another. The core portion has a glass transition temperature, Tg, higher than the shell portion in the core-shell type polymer particles. The ratio of the average diameter of the core-shell type polymer particles to the average diameter of the inorganic particles is 80% to 200%.

Separator for electrochemical device and electrochemical device containing same

A separator for an electrochemical device, including: a porous polymer substrate having a plurality of pores; and a porous coating layer on at least one surface of the porous polymer substrate, wherein the porous coating layer comprises boehmite particles and a binder polymer, wherein the binder polymer is positioned on at least a part of the surface of the boehmite particles and connects and fixes the boehmite particles with one another. The boehmite particles have an average particle diameter of 2.0 μm to 3.5 μm and a specific surface area of 4.0 m 2 /g to 4.5 m 2 /g, and one side of the porous coating layer has a thickness of 2 μm to 10 μm.

Separator for secondary battery, manufacturing method therefor, and secondary battery having separator

The present disclosure relates to a separator for a secondary battery, including: a porous polymer substrate; a porous coating layer formed on at least one surface of the porous polymer substrate, and including a plurality of inorganic particles and a first binder polymer for interconnecting and fixing the inorganic particles; and an adhesive layer formed on the top surface of the porous coating layer and including a second binder polymer, wherein the adhesive layer includes a first layer that is in contact with the top surface of the porous coating layer, and a second layer integrated with the first layer and facing an electrode, and the second layer has an average pore size larger than the average pore size of the first layer.The separator for a secondary battery can improve the problem related with resistance, while ensuring adhesion to an electrode.

All-solid lithium secondary battery and preparation method thereof

An all-solid lithium secondary battery and a preparation method thereof are proved. The all-solid lithium secondary battery comprises a positive electrode active material layer, a negative electrode active material layer including graphitized platelet carbon nanofibers and silver nanoparticles, and a solid electrolyte layer between the positive electrode active material layer and the negative electrode active material layer.

Separator for secondary battery, and secondary battery comprising same

Disclosed is a separator for a secondary battery, including: a porous polymer substrate having a plurality of pores; and a porous coating layer positioned on at least one surface of the porous polymer substrate and including a plurality of inorganic particles, a binder polymer and a urethane bond-containing crosslinked polymer, wherein the binder polymer and the urethane bond-containing crosslinked polymer are positioned on the whole or a part of the surface of the inorganic particles to connect the inorganic particles with one another and fix them, the urethane bond-containing crosslinked polymer has a weight average molecular weight of 100,000-5,000,000, and the crosslinked polymer is used in an amount of 6-60 parts by weight based on 100 parts by weight of the total weight of the binder polymer and the crosslinked polymer. A secondary battery including the separator is also disclosed.

Separator for secondary battery, and secondary battery comprising same

Separator for lithium secondary battery and lithium secondary battery comprising same

Method for manufacturing separator for electrochemical device

A separator with improved heat resistance and low resistance as well as Lami Strength that is equal or similar to that of the existing separator by using a predetermined amount of polyvinylpyrrolidone binder polymer relative to a polyvinylidene fluoride-based binder polymer, and a manufacturing method thereof.

All-solid lithium secondary battery and preparation method thereof

The present disclosure relates to an all-solid lithium secondary battery and a preparation method thereof, wherein the all-solid lithium secondary battery includes a positive electrode active material layer, a negative electrode active material layer, and a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer, wherein the negative electrode active material layer includes a carbon structure and silver nanoparticles, the carbon structure includes at least one hollow-type particle, and the hollow-type particle includes a hollow and a carbonaceous shell surrounding the hollow.

All-solid-state lithium secondary battery and manufacturing method therefor

The present invention relates to an all-solid lithium secondary battery and a preparation method thereof, wherein the all-solid lithium secondary battery includes a positive electrode active material layer, a negative electrode active material layer, and a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer, wherein the negative electrode active material layer includes platelet carbon nanofibers (Platelet Carbon Nano Fiber, PCNF) and silver nanoparticles.

Polyamide-based water treatment separating film having superior contamination resistance and method for manufacturing same

Separator for lithium secondary battery, the method for manufacturing the same and lithium secondary battery including the same

A separator for a lithium secondary battery, a method for manufacturing the same, and a secondary battery including the same. The separator includes a porous coating layer including a top layer, an intermediate layer, and a bottom layer. An amount of a particle-type binder polymer present in the top layer is larger than an amount of the particle-type binder polymer present in the bottom layer. The porous coating layer also includes a dispersant having a carboxyl group and a glycol group.

Separator, lithium secondary battery including separator, and manufacturing method therefor

Separator comprising variable binder having size varying according to ph and method for manufacturing separator therefor

The present invention relates to a separator including a variable binder having a size changed depending on pH and a method of manufacturing the same, and more particularly to a separator configured such that a variable binder having a size changed depending on pH is used in a separator coating layer to reduce resistance of a battery and to maintain uniform adhesive force while improving air permeability and a method of manufacturing the same.

All-solid-state lithium secondary battery and method for manufacturing same

The present invention relates to an all-solid lithium secondary battery and a preparation method thereof, wherein the all-solid lithium secondary battery includes a positive electrode active material layer, a negative electrode active material layer, and a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer, wherein the negative electrode active material layer includes a carbon structure and silver nanoparticles, the carbon structure includes a structure in which a plurality of graphene sheets are connected to each other, and the plurality of graphene sheets include two or more graphene sheets having different plane directions.

All-solid-state lithium secondary battery and method for manufacturing same

The present invention relates to an all-solid lithium secondary battery and a preparation method thereof, wherein the all-solid lithium secondary battery includes a positive electrode active material layer, a negative electrode active material layer, and a solid electrolyte layer disposed between the positive electrode active material layer and the negative electrode active material layer, wherein the negative electrode active material layer includes a carbon structure and silver nanoparticles, the carbon structure includes at least one hollow-type particle, and the hollow-type particle includes a hollow and a carbonaceous shell surrounding the hollow.

Separator including variable binder having size changed depending on ph and method of manufacturing the same

A separator including a variable binder, wherein a particle size of the variable binder changes depending on pH of the variable binder and a method of manufacturing the same, and more particularly to a separator configured such that a variable binder is used in a separator coating layer to reduce resistance of a battery and to maintain uniform adhesive force while improving air permeability and a method of manufacturing the same.

Separator for electrochemical device and an electrochemical device comprising the same

A separator for an electrochemical device and an electrochemical device comprising the same. The separator comprises a porous polymer substrate and a heat resistant coating layer on at least one surface of the porous polymer substrate. The heat resistant coating layer is a porous polymer layer having pores, and comprises a polyvinyl pyrrolidone-based polymer and a polyvinylidene fluoride (PVDF)-based polymer.

Separator for secondary battery, manufacturing method therefor, manufacturing method of secondary battery comprising same, and secondary battery manufactured thereby

Preparation method for separator for electrochemical device and separator for electrochemical device prepared by same preparation method

Separator comprising variable binder having size varying according to ph and method for manufacturing separator therefor

Separator for electrochemical device and method for manufacturing the same

A separator for an electrochemical device. The separator includes a porous coating layer formed from an acid, which is crosslinkable. As a result, the separator has increased heat resistance, safety and physical strength, shows improved peel strength between the porous substrate and the porous coating layer, and prevents separation of the inorganic particles from the porous coating layer. In addition, the separator shows an improved crosslinking degree so that the added amount of a crosslinkable binder resin may be reduced. Thus, it is possible to increase the added amount of a non-crosslinkable resin, inorganic particles, or both. Even when using a small amount of a crosslinkable binder resin, it is possible to provide both an effect of improving heat resistance and an effect of improving adhesion.

Polyamide water-treatment separation membrane with improved antifouling properties and manufacturing method thereof

A water-treatment separation membrane with good antifouling properties includes a support having pores, a polyamide layer formed on the support, and a passivation layer comprising specific materials formed on the polyamide layer.

Method of manufacturing reverse osmosis membrane, and reverse osmosis membrane manufactured thereby

There are provided a method of manufacturing a reverse osmosis membrane and a reverse osmosis membrane manufactured thereby. The method includes forming a polysulfone layer by applying a solution including a mixed solvent containing two or more solvents having different solubility parameter values to a surface of a porous support; and forming an active layer on the polysulfone layer.