WO2013075524A1 - Film de séparation multicouches poreux pour batterie secondaire à ions lithium, et procédé de fabrication - Google Patents

Film de séparation multicouches poreux pour batterie secondaire à ions lithium, et procédé de fabrication Download PDF

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Publication number
WO2013075524A1
WO2013075524A1 PCT/CN2012/080782 CN2012080782W WO2013075524A1 WO 2013075524 A1 WO2013075524 A1 WO 2013075524A1 CN 2012080782 W CN2012080782 W CN 2012080782W WO 2013075524 A1 WO2013075524 A1 WO 2013075524A1
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Prior art keywords
coating
lithium ion
ion secondary
secondary battery
heat resistant
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PCT/CN2012/080782
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English (en)
Chinese (zh)
Inventor
王松钊
王辉
蔡朝辉
吴耀根
廖凯明
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佛山市金辉高科光电材料有限公司
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Publication of WO2013075524A1 publication Critical patent/WO2013075524A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/411—Organic material
    • H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/489—Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
    • H01M50/491—Porosity
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/18—Homopolymers or copolymers of nitriles
    • C08J2333/20—Homopolymers or copolymers of acrylonitrile
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • H01M50/457—Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to the field of lithium ion battery technology, and in particular to a lithium ion secondary battery porous multilayer separator and a method of manufacturing the same.
  • the rechargeable lithium ion secondary battery has the advantages of high working voltage, high energy density, long cycle life, no memory effect, no pollution, and rapid charge and discharge, and is widely used in daily electronics, electrical appliances and digital products. Broad market space and good development prospects. With the increasing demand for portable battery quality, lithium ion secondary batteries have become a hot spot in the research of new power supply technologies in recent years. Seeking higher energy density of lithium ion secondary batteries is an important direction of current research, and it is followed by technical issues on how to ensure the safety of lithium batteries.
  • Polymer separator is one of the key components of lithium ion secondary battery, and it is the key to ensure the safety performance of lithium battery. Its quality has a great influence on the capacity, service life and battery safety of lithium battery.
  • the polymer membrane as the separator of the lithium ion secondary battery must meet certain requirements: First, the diaphragm itself must be a non-conductive material, separating the positive and negative electrodes of the battery to prevent short-circuit between the two electrodes; secondly, the diaphragm must be a porous material. Allows the passage of positive and negative ions in the electrolyte to maintain good ion conductivity between the positive and negative electrodes during charging and discharging of the lithium ion battery. Third, the diaphragm must have good shutdown performance.
  • the battery When the external is short-circuited or connected by mistake, the battery is internally generated. At very large currents, when the inside of the battery rises to a certain temperature, the diaphragm will thermally melt and cause the microporous structure to close, thereby cutting off the current, stopping the battery and ensuring battery safety. Finally, the diaphragm must have sufficient chemical stability. It can be wetted by electrolyte and has sufficient mechanical strength and the like while being resistant to electrolyte corrosion. With the development of new energy vehicles, the design of lithium-ion battery packs has seriously challenged the safety of lithium-ion batteries. Therefore, lithium-ion battery manufacturers have put forward higher and higher requirements for lithium-ion battery separators.
  • Lithium-ion battery separators must have a suitable closed-cell temperature to cut off the current in time to ensure battery safety.
  • the diaphragm must have a high heat-resistant temperature to prevent the diaphragm from melting and cracking when the battery is short-circuited, causing the battery to short-circuit. ⁇ ) Exploded.
  • a suitable closed cell temperature of a lithium battery separator is 120-140 ° C, and a closed cell temperature is too high or too low to be suitable as a lithium battery separator.
  • the closed cell temperature of the polyethylene membrane prepared by the wet method is 130-140 ° C, which is an ideal closed cell temperature, but the heat resistance of the polyethylene separator is poor, the film rupture temperature is lower than 150 ° C, and the safety of the battery is short-circuited. Not well protected.
  • the heat resistance of the separator prepared by these systems is still insufficient.
  • Cikon patent CN 101689624A discloses a polyethylene film as a substrate, which is covered with a layer of a metal hydroxide which is dehydrated by a wholly aromatic polyamide and a temperature of 200 ° C or more and 400 ° C or less.
  • a composite film of a heat-resistant organic polymer material the object of which is to provide a separator excellent in heat resistance, shutdown function, flame retardancy and handleability.
  • the coating layer is formed by laminating a porous layer formed of a heat-resistant polymer by a wet coagulation method, and requires a process of coagulating solidification, washing with water to remove coagulating liquid, and drying water, and the process is complicated, and the thickness of the separator is uniform. Poor.
  • the Chinese invention patent CN101281961 discloses a coating composition for a lithium ion secondary battery separator, and in particular, a coating comprising an electrically insulating oxide particle and a binder on a polyethylene film.
  • the coating is prepared by coating a coating liquid containing a binder, electrically insulating oxide particles and a solvent to form a coating liquid, and then directly drying and molding. Since the coating method is room temperature coating, it is difficult to ensure the effective dispersion of the inorganic particles and the adhesion between them and the binder, and the coating pore structure is small. Summary of the invention
  • an object of the present invention is to provide a porous multilayer separator for a lithium ion secondary battery.
  • Another object of the present invention is to provide a method for producing a porous multilayer separator for a lithium ion secondary battery.
  • a porous multilayer separator for a lithium ion secondary battery comprising a polyolefin porous film and at least one heat resistant coating layer coated on the polyolefin porous film, wherein the heat resistant coating layer is composed of a heat resistant resin and an inorganic
  • the insulating particle composition has a weight ratio of the heat resistant resin to the inorganic insulating particles of 1:0.5-5.
  • the weight ratio of the heat resistant resin to the inorganic insulating particles is less than 1:0.5, the added inorganic porous insulating particles have no significant effect on the heat resistance effect and heat shrinkage effect of the separator; if the weight ratio is greater than 1:5, the resin content is excessive Small, the inorganic non-conductive particles are not firmly bonded, and the inorganic ions are likely to fall off.
  • the heat resistant resin described in the present invention is one or two of polyvinylidene fluoride, polycarbonate, polyester, polyarylate, polyamide, polyacrylonitrile, and poly 4-mercapto-1-pentene. More than one kind of mixture.
  • the inorganic insulating particles according to the present invention are one or a mixture of two or more of aluminum, magnesium oxide, hydroxide, or silicon oxide, carbide and nitride.
  • a method for manufacturing a porous multilayer separator for a lithium ion secondary battery comprising a heat resistant resin coating comprising the steps of:
  • preparing a coating liquid first dissolving the heat resistant resin, adding inorganic insulating particles in a weight ratio of the heat resistant resin to the inorganic insulating particles of 1:0.2-10, stirring and mixing to prepare a heat resistant resin and inorganic insulating particles. Uniform coating liquid;
  • Coating applying the above coating liquid onto the surface of the hot polyolefin microporous base film to form a heat-resistant coating, a polyolefin microporous base film volatilizing solvent containing a coating layer, and a solvent to volatilize to obtain a microporous film containing a microporous coating;
  • the microporous film containing the microporous coating is uniaxially stretched or biaxially stretched in the longitudinal or transverse direction thereof to enlarge the micropores of the coating;
  • the heat resistant resin is polyvinylidene fluoride, polycarbonate, polyester, polyarylate, polyamide. And one or a mixture of two or more of polyacrylonitrile and poly 4-mercapto-1-pentene.
  • the inorganic porous insulating particles are oxides and hydroxides of aluminum and magnesium, and oxides and carbonization of silicon.
  • One or more of the substance and the nitride are mixed.
  • the solvent used for dissolving the heat resistant resin in the step a of the present invention is one of N-nonylpyrrolidone, N,N-dimercaptoacrylamide, N,N-dimercaptoamide, and dimercaptosulfoxide. Or a mixture of two or more.
  • the melting point of the heat resistant resin is greater than 180 ° C; the specific surface area of the inorganic insulating particles is 5 to 200 m 2 /g; and the amount of the heat resistant resin is 5 to 50 based on the total weight of the heat resistant resin and the solvent; %.
  • the temperature of the polyolefin micropores is 50-100 ° C
  • the solvent volatilization temperature is 30-110 ° C
  • the volatilization time is 10-300 S.
  • the stretching in the c step of the present invention may be a biaxial stretching in the longitudinal direction and the transverse direction, or a uniaxial stretching in the longitudinal direction or the transverse direction.
  • the total magnification of stretching is 1.1-5 times, preferably 1.5-3 times, the total stretching ratio is less than 1.1, the hole diameter expansion effect of the coating is not obvious; the stretching ratio is more than 5, and the coating is easy to be microporous with polyolefin.
  • the membrane is detached and the membrane is easily broken.
  • the stretching temperature is 80 to 150 ° C, preferably 90 to 120 ° C.
  • the heat setting temperature in the step d of the present invention is 100-160 ° C, and the heat setting time is 10 s-120 s.
  • the inorganic insulating particles in the step a according to the present invention have a particle size of 10 to 1000 nm.
  • the thickness of the polyolefin microporous base film is less than ⁇ , the diaphragm is too thin, and the mechanical properties of the separator are insufficient.
  • the thickness of the polyolefin microporous base film is greater than 25 ⁇ , the thickness of the composite separator obtained after coating is too large, resulting in a decrease in the energy density of the lithium ion battery, which is not conducive to the application of the power lithium battery.
  • the polyolefin microporous base film of the present invention has a thickness of 12-25 ⁇ m, and each layer of the heat resistant coating has a thickness of 2-6 ⁇ m; finally, a porous multilayer separator of a lithium ion secondary battery containing a heat resistant resin coating is obtained.
  • the thickness can be adjusted as needed, preferably having a thickness of 18-40 ⁇ m.
  • the porous multilayer separator for a lithium ion secondary battery according to the present invention may be a single layer coated with a heat resistant coating on one side of the polyolefin microporous base film, or may be coated with the same layer or different layers according to the performance requirements.
  • the heat-resistant coating layer is coated; the polyolefin microporous base film may be coated with a heat-resistant coating on one side or both sides, wherein the porous multilayer separator obtained by double-side coating has better heat resistance.
  • the porous multilayer separator coating prepared by the invention has excellent heat resistance, and the heat resistant coating layer is also a film layer having a microporous structure, and the film layer has sufficient High porosity and heat-resistant temperature, even in the case of melt fracture of polyolefin microporous base film, the coating can maintain its integrity and block the direct contact of the battery electrode, thus ensuring the safety of the battery;
  • the thermal coating and the micropores of the microporous membrane of the matrix membrane layer penetrate each other to ensure the permeation performance of lithium ions.
  • the porous multilayer separator of the present invention expands the pore diameter of the microporous coating by subsequent biaxial stretching, thereby increasing the porosity and the permeation ability of lithium ions.
  • the porous multilayer separator prepared by the preparation method of the present invention has a porosity of 30-80%, a gas permeability of 200-700 s/100 ml, a pore size of 0.01-0.2 ⁇ , a closed cell temperature of 130-140 ° C, and a breakage.
  • the film temperature is greater than 190 °C.
  • a method for manufacturing a porous multilayer separator for a lithium ion secondary battery comprising a heat resistant resin coating comprising the steps of:
  • preparing a coating liquid first dissolving the heat resistant resin, adding inorganic insulating particles in a weight ratio of the heat resistant resin to the inorganic insulating particles of 1:0.2-10, stirring and mixing to prepare a heat resistant resin and inorganic insulating particles. Uniform coating liquid;
  • b. coating applying the above coating liquid onto the surface of the hot polyolefin microporous base film to form a heat resistant coating layer, a coating layer containing a polyolefin microporous base film volatile solvent, After the solvent is volatilized, a microporous film containing a microporous coating is obtained;
  • the microporous film containing the microporous coating is uniaxially stretched or biaxially stretched in the longitudinal or transverse direction thereof to enlarge the micropores of the coating;
  • the polyethylene microporous base film having a thickness of 20 ⁇ m and a porosity of 50% was heated to 100 ° C, and the suspension was applied by a doctor coating at a coating speed of 5 cm/s.
  • the temperature at which the solvent is volatilized is controlled to be 80 ° C, and the time for controlling the evaporation of the solvent by blowing is 60 S; then the coating step is performed on the side of the uncoated suspension to obtain two sides.
  • a separator having a microporous heat-resistant layer containing a heat resistant resin and magnesium oxide is attached to the separator; the separator prepared above is subjected to a low-stretching treatment at a stretching temperature of 110 ° C and a longitudinal stretching of 1.3 times. The film was stretched 1.3 times in the width direction to enlarge the pore diameter of the heat-resistant coating; and heat-set at 120 ° C for 60 seconds to obtain a porous multilayer composite separator having a thickness of 26 ⁇ m.
  • the performance test data of the diaphragm is shown in Table 1.
  • the solvent was volatilized, and then the polyethylene microporous base film having a thickness of 20 ⁇ m and a porosity of 50% was heated to 100 ° C, and the suspension was applied by a coating method at a coating speed of 5 cm/s. Covering the polyethylene microporous base film, the temperature at which the solvent is volatilized is controlled to be 80 ° C, and the evaporation time of the solvent is controlled by a blowing method to be 100 S; then the coating step is performed on the side of the uncoated suspension.
  • the performance test data of the diaphragm is shown in Table 1.
  • the polyethylene microporous base film having a thickness of 20 ⁇ m and a porosity of 50% was heated to 100 ° C, and the suspension was applied by a knife coating at 5 cm/s.
  • the speed is coated on the polyethylene microporous base film, the temperature at which the solvent is volatilized is controlled to be 100 ° C, and the time for controlling the evaporation of the solvent by the blowing method is 10 S; then the coating on the side not coated with the suspension is applied a step of obtaining a separator having a microporous heat-resistant layer containing a heat-resistant resin and an alumina uniformly adhered on both sides; and performing the low-stretching treatment on the separator prepared above, the stretching temperature is 110 ° C, and the stretching in the longitudinal direction 1.3 times and 1.3 times in the width direction, the pore diameter of the heat-resistant coating is enlarged.
  • a porous multilayer composite separator having a thickness of 20 ⁇ m and a porosity of 50% was heated to
  • the polyethylene microporous base film having a porosity of 50% was heated to 100 ° C, and the suspension was applied to the polyethylene microporous base film at a coating speed of 5 cm/s by knife coating.
  • the temperature at which the solvent is volatilized is 80 ° C, and the time for controlling the evaporation of the solvent by blowing is 60 S; then the coating step is performed on the side of the uncoated suspension to obtain uniform heat resistance on both sides.
  • the polyethylene microporous base film having a thickness of 20 ⁇ m and a porosity of 50% was heated to 100 ° C, and the suspension was applied by a knife coating at 5 cm/s.
  • the speed is coated on the polyethylene microporous base film, the temperature at which the solvent is volatilized is controlled to be 80 ° C, and the time for controlling the evaporation of the solvent by blowing is 60 S; then the coating on the side not coated with the suspension is applied.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Cell Separators (AREA)

Abstract

L'invention concerne un film de séparation multicouches poreux pour batterie secondaire à ions lithium, comprenant un film poreux de polyoléfines et au moins une couche d'un revêtement thermorésistant appliquée sur le film poreux de polyoléfines, le revêtement thermorésistant comprenant une résine thermorésistante et des particules isolantes minérales selon un rapport en poids entre la résine thermorésistante et les particules isolantes minérales de 1:0,5-5. Le revêtement de film de séparation multicouches poreux est obtenu en préparant un liquide de revêtement, et par des processus de l'application, d'étirement et de mise en forme, et possède une excellente résistance thermique, une résistance suffisante en température et, même si le film poreux de polyoléfines est fondu et brisé, le revêtement conserve toujours son intégrité de manière à séparer les électrodes de la batterie et empêcher leur contact direct. Le revêtement thermorésistant est un film ayant une structure microporeuse, possède une porosité suffisante, et est en communication avec les micropores du film poreux de polyoléfines, garantissant ainsi la perméabilité des ions lithium. L'invention concerne également un procédé de fabrication du film de séparation multicouches poreux pour batterie secondaire à ions lithium.
PCT/CN2012/080782 2011-11-25 2012-08-30 Film de séparation multicouches poreux pour batterie secondaire à ions lithium, et procédé de fabrication WO2013075524A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110382570.8A CN102394282B (zh) 2011-11-25 2011-11-25 一种锂离子二次电池多孔多层隔膜及其制造方法
CN201110382570.8 2011-11-25

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CN109406006A (zh) * 2018-10-20 2019-03-01 武汉惠强新能源材料科技有限公司 锂电池隔膜闭孔、破膜温度测试装置
CN113363666A (zh) * 2021-05-06 2021-09-07 惠州锂威新能源科技有限公司 隔膜的制备方法、隔膜及应用隔膜的电化学装置
CN114552003A (zh) * 2020-11-24 2022-05-27 天津大学 一种提高电解液加装性能的方法
CN116903907A (zh) * 2023-08-17 2023-10-20 深圳市三实新材料科技有限公司 一种防水透气膜的制备方法及其应用

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CN102394282B (zh) * 2011-11-25 2014-12-10 佛山市金辉高科光电材料有限公司 一种锂离子二次电池多孔多层隔膜及其制造方法
JP2013222582A (ja) * 2012-04-16 2013-10-28 Sony Corp 二次電池、電池パック、電動車両、電力貯蔵システム、電動工具および電子機器
JP6279479B2 (ja) * 2012-10-31 2018-02-14 旭化成株式会社 多層多孔膜及びその製造方法、並びに非水電解液電池用セパレータ
CN102942831B (zh) * 2012-11-21 2014-10-29 佛山市金辉高科光电材料有限公司 用于锂离子二次电池隔膜的涂层组合物及该隔膜的制造方法
EP2978047B1 (fr) * 2013-03-19 2017-11-22 Sony Corporation Séparateur, batterie, bloc de batteries, appareil électronique, véhicule électrique, dispositif de stockage d'énergie, et système d'énergie
CN104157812B (zh) * 2014-04-23 2017-08-25 华南理工大学 锂离子电池隔膜及其制备方法及锂离子电池
CN104064710A (zh) * 2014-06-20 2014-09-24 青岛中科华联新材料有限公司 采用陶瓷涂覆的高孔隙率锂电池隔膜的生产工艺
CN108134036B (zh) * 2014-12-16 2020-06-16 东莞新能源科技有限公司 一种有机-无机复合电解质膜，其制备方法及应用
CN105655518B (zh) * 2015-09-07 2019-04-09 浙江南洋经中新材料有限公司 一种新型多孔锂电池隔膜的制备工艺
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CN105355812B (zh) * 2015-12-14 2018-06-19 苏州锂盾储能材料技术有限公司 一种锂电隔膜的制备方法
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