WO2015041472A1 - 열 안정성이 우수한 분리막 및 이를 포함하는 이차전지 - Google Patents
열 안정성이 우수한 분리막 및 이를 포함하는 이차전지 Download PDFInfo
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- WO2015041472A1 WO2015041472A1 PCT/KR2014/008671 KR2014008671W WO2015041472A1 WO 2015041472 A1 WO2015041472 A1 WO 2015041472A1 KR 2014008671 W KR2014008671 W KR 2014008671W WO 2015041472 A1 WO2015041472 A1 WO 2015041472A1
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- separator
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- 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
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- 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
- H01M50/446—Composite material consisting of a mixture of organic and inorganic materials
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- 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
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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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/20—Manufacture of shaped structures of ion-exchange resins
- C08J5/22—Films, membranes or diaphragms
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- 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
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
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- 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
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- 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
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- 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
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- 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
- H01M50/443—Particulate material
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- 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
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- 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
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- 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
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- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/593—Spacers; Insulating plates
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Definitions
- the spacer layer may be softened by electrolyte impregnation and rupture at a temperature above 200 ° C. or a pressure above 50 kg / cm 2 .
- a porous coating layer including a mixture of organic particles or inorganic particles and a binder polymer may be further formed.
- the layer including the microcapsules may further include a mixture of organic particles or inorganic particles and a binder polymer.
- a slurry obtained by dispersing an inorganic particle or an organic particle and a binder polymer in an organic solvent applying the slurry to a porous substrate, and before or after the slurry is dried,
- a method for producing a separator comprising the step of further applying a dispersion dispersed in a solvent.
- the secondary battery may be a lithium secondary battery.
- FIG. 1 is a view schematically showing a microcapsule having a structure of a core-shell layer-spacer layer according to the present invention.
- the separator according to the present invention includes a microcapsule carrying a heat stabilizer and having a structure of a core-shell layer-spacer layer.
- the spacer layer is a component that protects the shell layer from rupturing during the lamination process of the electrode assembly. As a result, a phenomenon in which the thermal stabilizer is eluted in advance does not occur even though the battery is not overheated. If the cell is designed with the heat stabilizer unintentionally pre-intentionally or intended to be eluted before the cell overheats, then the eluted heat stabilizer component adversely affects battery performance, which is undesirable.
- the spacer layer is formed of a material that maintains rigidity even after the electrolyte solution is impregnated, it is not preferable because the period until the effect is expressed from the microcapsules in a thermal abuse situation of the battery becomes long. Therefore, it must be softened at the time of electrolyte impregnation, so that the stiffness characteristic is lost or reduced.
- the 'shell' layer herein is a component located between the spacer layer and the core and surrounding the core.
- the shell layer can be preserved intact in spite of the electrode lamination process due to the spacer layer.After the impregnation of the electrolyte, the spacer layer is softened and the cell is thermally abused due to thermal abuse and the internal pressure is increased. Release the supported heat stabilizer.
- the shell must melt or decompose at a temperature of 70 to 100 ° C. or rupture at a pressure of 3 to 10 kg / cm 2 . If designed to rupture at a lower temperature or pressure than the above, the thermal stabilizer may elute unnecessarily quickly to deteriorate battery performance.If designed to rupture at a higher temperature or pressure, the thermal stabilizer does not elute even when the battery is overheated. It produces results that do not produce the desired effect.
- the cell layer ruptures when the cell is expanded by thermal abuse and the temperature or pressure of the cell becomes higher than the temperature or pressure.
- the heat stabilizer may be included in the porous coating layer in the form of aggregates formed by aggregation by physical bonding.
- Non-limiting examples of heat stabilizers include phosphate compounds, phenol compounds, cyclic amine compounds, semicarbazide, amine compounds, nitro compounds, phosphite compounds, unsaturated hydrocarbon compounds and thio It may be one or a mixture of two or more selected from the group consisting of a compound.
- Preferred examples of the phosphate compound include triphenyl phosphate.
- triphenyl phosphate has excellent battery ignition inhibitory effect, it is particularly preferable to be applied to the separator in the form of microcapsules according to the present invention because it adversely affects the battery performance when added in excess.
- Semicarbazide derivatives such as 1-acetylsemicacarbide, 1-chloroacetylsemicacarbide, 1-dichloroacetyl-semicarbazide, 1-benzoylsemicarbazide, semicarbazone and the like.
- the unsaturated hydrocarbon-based heat stabilizer is not particularly limited, and may be, for example, styrene, 1,3-hexadiene, methyl styrene, or the like, and the thio-based heat stabilizer may be dilauryl thiodipropionate or dimyristylthio. Propionate, distearyl thiodipropionate, dodecyl mercaptan, 1,3-diphenyl-2-thiourea and the like.
- the phosphite thermal stabilizer is, for example, triphenyl phosphite, diphenylisodecyl phosphite, phenyldiisodecyl phosphite, 4,4'-butylidene-bis (3-methyl-6- t-butylphenyl-di-tridecyl) phosphate, cyclic neopentanetetrayl-bis (octadecyl) phosphite, tris (nonylphenyl) phosphite and tris (dinonyl) phosphite, dioctadecyl-3,5- Di-t-butyl-4-hydroxybenzylphosphonate, di-n-octadecyl-1- (3,5-di-t-butyl-4-hydroxy-phenyl) -ethanephosphonate, and the like. It may be, but is not limited to these
- the content of the heat stabilizer is preferably 0.01 to 1% by weight based on the total weight of the nonaqueous electrolyte. If the content of the thermal stabilizer is too small, the effect of addition may not be obtained. On the contrary, if the content of the thermal stabilizer is too high, the excessive amount of the electrolyte may be absorbed and swelled to weaken the binding force between the electrode and the separator and may cause various side reactions in the battery. not.
- the size of the microcapsule preferably has a particle size of approximately 1 to 50 ⁇ m.
- a small particle size having a large surface area per unit weight is preferable, but capsule particles having a particle size smaller than the lower limit may be difficult to manufacture and may not destroy the spacer layer or the shell layer when the battery is overheated. .
- the size of the microcapsules is larger than the upper limit, it can be ruptured too easily by pressing.
- the microcapsules may be applied to at least one side of the porous substrate constituting the separator.
- it may be located at the surface layer of the porous coating layer.
- the inorganic particles preferably include high dielectric constant inorganic particles having a dielectric constant of 5 or more, preferably 10 or more.
- inorganic particles having a dielectric constant of 5 or more include BaTiO 3 , Pb (Zr, Ti) O 3 (PZT), Pb 1-x La x Zr 1-y Ti y O 3 (PLZT, 0 ⁇ x ⁇ 1 , 0 ⁇ y ⁇ 1), Pb (Mg 1/3 Nb 2/3 ) O 3 -PbTiO 3 (PMN-PT), Hafnia (HfO 2 ), SrTiO 3 , SnO 2 , CeO 2 , MgO, NiO, CaO, ZnO, ZrO 2 , SiO 2 , Y 2 O 3 , Al 2 O 3 , SiC, TiO 2, or mixtures thereof.
- the inorganic particles may be inorganic particles having a lithium ion transfer ability, that is, inorganic particles containing a lithium element, but having a function of moving lithium ions without storing lithium.
- inorganic particles having a lithium ion transfer capacity include lithium phosphate (Li 3 PO 4 ), lithium titanium phosphate (LixTiy (PO 4 ) 3 , 0 ⁇ x ⁇ 2, 0 ⁇ y ⁇ 3), lithium aluminum titanium Phosphate (Li x Al y Ti z (PO 4 ) 3 , 0 ⁇ x ⁇ 2, 0 ⁇ y ⁇ 1, 0 ⁇ z ⁇ 3), 14Li 2 O-9Al 2 O 3 -38TiO 2 -39P 2 O 5, etc.
- the separator is a separator in which a porous coating layer including inorganic particles or organic particles and a binder polymer is formed on at least one surface of the porous substrate
- the microcapsules carrying the heat stabilizer are mixed into a slurry for forming the porous coating layer and the slurry is porous.
- Coating on at least one side of the substrate, or immediately after applying the slurry for forming the porous coating layer on at least one side of the porous substrate or after the slurry is dried may be prepared by applying a dispersion including a microcapsule thereon.
- the method of applying the dispersion or slurry is not particularly limited, and for example, a conventional coating method known in the art may be used, for example, dip coating, die coating, roll coating. Various methods may be used, such as a comma coating or a mixing method thereof.
- the separator is interposed between the positive electrode and the negative electrode, and the electrode assembly including the positive electrode, the separator, and the negative electrode is folded, wound or laminated according to a desired battery type. Subsequently, it accommodates in a battery exterior material, injects electrolyte solution, and manufactures a secondary battery.
- the positive electrode current collector is generally made to a thickness of 3 to 500 ⁇ m. Such a positive electrode current collector is not particularly limited as long as it has high conductivity without causing chemical change in the battery.
- a positive electrode current collector is not particularly limited as long as it has high conductivity without causing chemical change in the battery.
- the surface of stainless steel, aluminum, nickel, titanium, calcined carbon, or aluminum or stainless steel Surface treated with carbon, nickel, titanium, silver or the like can be used.
- the current collector may form fine irregularities on its surface to increase the adhesion of the positive electrode active material, and may be in various forms such as a film, a sheet, a foil, a net, a porous body, a foam, and a nonwoven fabric.
- the conductive material is typically added in an amount of 1 to 50% by weight based on the total weight of the mixture including the positive electrode active material.
- a conductive material is not particularly limited as long as it has conductivity without causing chemical change in the battery, and examples thereof include graphite such as natural graphite and artificial graphite; Carbon blacks such as carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black and summer black; Conductive fibers such as carbon fibers and metal fibers; Metal powders such as carbon fluoride powder, aluminum powder and nickel powder; Conductive whiskeys such as zinc oxide and potassium titanate; Conductive oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives and the like can be used. In some cases, since the conductive second coating layer is added to the positive electrode active material, the addition of the conductive material may be omitted.
- the negative electrode is manufactured by applying and drying a negative electrode material on the negative electrode current collector, and if necessary, the components as described above may be further included.
- the negative electrode current collector is generally made to a thickness of 3 to 500 ⁇ m.
- a negative electrode current collector is not particularly limited as long as it has conductivity without causing chemical change in the battery.
- the surface of copper, stainless steel, aluminum, nickel, titanium, calcined carbon, copper or stainless steel Surface-treated with carbon, nickel, titanium, silver, and the like, aluminum-cadmium alloy, and the like can be used.
- fine concavities and convexities may be formed on the surface to enhance the bonding strength of the negative electrode active material, and may be used in various forms such as a film, a sheet, a foil, a net, a porous body, a foam, a nonwoven fabric, and the like.
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Abstract
Description
Claims (15)
- 다공성 기재; 및 상기 다공성 기재의 적어도 일면에 코팅되어 있으며, 열 안정제가 있는 코어(core) 부분, 상기 코어 부분을 둘러싸고 있는 셸(shell) 층 및 상기 셸 층을 둘러싸고 있는 스페이서(spacer) 층으로 이루어진 미세 캡슐을 포함한 층을 포함하는 분리막.
- 제1항에 있어서,상기 스페이서 층은 전해액 함침에 의해 연화되고 200 ℃보다 높은 온도 또는 50 kg/cm2보다 높은 압력에서 파열되는 것을 특징으로 하는 분리막.
- 제1항에 있어서,상기 셸 층이 70 내지 100℃의 온도 또는 3 내지 10 kg/cm2의 압력에서 파열되는 것을 특징으로 하는 분리막.
- 제1항에 있어서,상기 다공성 기재 및 상기 미세 캡슐을 포함한 층의 사이에, 유기 입자 또는 무기 입자와, 바인더 고분자의 혼합물을 포함하는 다공성 코팅층이 더 형성되어 있는 것을 특징으로 하는 분리막.
- 제1항에 있어서,상기 미세 캡슐을 포함한 층이, 유기 입자 또는 무기 입자와, 바인더 고분자의 혼합물을 더 포함하는 것을 특징으로 하는 분리막.
- 제1항에 있어서,상기 열 안정제가 포스페이트계 화합물, 페놀계 화합물, 환형 아민계 화합물, 세미카바자이드(Semicarbazide), 아민계 화합물, 니트로계 화합물, 포스파이트(phosphite)계 화합물, 불포화 탄화수소계 화합물 및 티오계 화합물로 이루어진 군에서 선택된 1종 또는 2종 이상의 혼합물인 것을 특징으로 하는 분리막.
- 제1항에 있어서,상기 열 안정제가 트리페닐 포스페이트인 것을 특징으로 하는 분리막.
- 제1항에 있어서,상기 셸은 폴리올레핀, 폴리비닐알코올(PVA) 및 폴리염화비닐(PVC)로 이루어진 군에서 선택되는 1 종 또는 2종 이상의 혼합물을 포함하여 이루어진 것을 특징으로 하는 분리막.
- 제1항에 있어서,상기 스페이서는 폴리비닐리덴플루오라이드, 폴리비닐리덴 플루오라이드-헥사플루오로프로필렌 (polyvinylidene fluoride-co-hexafluoropropylene), 폴리비닐리덴 플루오라이드-트리클로로에틸렌 (polyvinylidene fluoride-co-trichloroethylene), 폴리메틸메타크릴레이트 (polymethylmethacrylate), 폴리부틸아크릴레이트 (polybutylacrylate), 폴리아크릴로니트릴 (polyacrylonitrile), 폴리비닐피롤리돈 (polyvinylpyrrolidone), 폴리비닐아세테이트 (polyvinylacetate), 에틸렌 비닐 아세테이트 공중합체 (polyethylene-co-vinyl acetate), 폴리에틸렌옥사이드 (polyethylene oxide), 폴리아크릴산, 폴리비닐알콜, 폴리아릴레이트(polyarylate), 셀룰로오스 아세테이트 (cellulose acetate), 셀룰로오스 아세테이트 부틸레이트 (cellulose acetate butyrate), 셀룰로오스 아세테이트 프로피오네이트 (cellulose acetate propionate), 시아노에틸플루란 (cyanoethylpullulan), 시아노에틸폴리비닐알콜 (cyanoethylpolyvinylalcohol), 시아노에틸셀룰로오스 (cyanoethylcellulose), 시아노에틸수크로오스 (cyanoethylsucrose), 플루란 (pullulan) 및 카르복실 메틸 셀룰로오스 (carboxyl methyl cellulose)로 이루어진 군으로부터 선택된 어느 하나 또는 이들 중 2종 이상의 혼합물을 포함하여 이루어진 것을 특징으로 하는 분리막.
- 제1항에 기재된 미세 캡슐을 유기 용매에 분산시킨 분산액을 형성하는 단계, 및 상기 분산액을 다공성 기재에 적용하는 단계를 포함하는 것을 특징으로 하는 분리막의 제조방법.
- 제1항에 기재된 미세 캡슐, 무기 입자 또는 유기 입자, 및 바인더 고분자를 유기 용매에 분산시킨 슬러리를 형성하는 단계, 및 상기 슬러리를 다공성 기재에 적용하는 단계를 포함하는 것을 특징으로 하는 분리막의 제조방법.
- 무기 입자 또는 유기 입자, 및 바인더 고분자를 유기 용매에 분산시킨 슬러리를 형성하는 단계, 상기 슬러리를 다공성 기재에 적용하는 단계, 및 상기 슬러리가 건조되기 전에 혹은 그 후에, 제1항에 기재된 미세 캡슐을 유기 용매에 분산시킨 분산액을 더 적용하는 단계를 포함하는 것을 특징으로 하는 분리막의 제조방법.
- 양극, 음극, 양극과 음극 사이에 개재된 분리막 및 전해액을 포함하는 이차전지에 있어서,상기 분리막이 제1항 내지 제10항중 어느 한 항에 기재된 분리막인 것을 특징으로 하는 이차전지.
- 제13항에 있어서,상기 열 안정제의 함량은 전해액 총 중량을 기준으로 0.01 ~ 1 중량%인 것을 특징으로 하는 이차전지.
- 제14항에 있어서,상기 이차전지가 리튬이차전지인 것을 특징으로 하는 이차전지.
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JP2016540824A JP6215477B2 (ja) | 2013-09-17 | 2014-09-17 | 熱安定性に優れた分離膜及びこれを含む二次電池 |
US14/435,625 US9793528B2 (en) | 2013-09-17 | 2014-09-17 | Separator with improved thermal stability and secondary battery comprising the same |
CN201480002843.3A CN104769744B (zh) | 2013-09-17 | 2014-09-17 | 具有改善的热稳定性的隔膜以及包含其的二次电池 |
EP14845273.3A EP2894693B1 (en) | 2013-09-17 | 2014-09-17 | Separation film having excellent thermal stability and secondary battery comprising same |
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KR1020140123674A KR101841804B1 (ko) | 2013-09-17 | 2014-09-17 | 열 안정성이 우수한 분리막 및 이를 포함하는 이차전지 |
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EP2894693B1 (en) | 2018-03-14 |
EP2894693A1 (en) | 2015-07-15 |
EP2894693A4 (en) | 2016-06-29 |
TW201535842A (zh) | 2015-09-16 |
CN104769744A (zh) | 2015-07-08 |
KR101841804B1 (ko) | 2018-03-23 |
US20150243952A1 (en) | 2015-08-27 |
US9793528B2 (en) | 2017-10-17 |
TWI525880B (zh) | 2016-03-11 |
KR20150032229A (ko) | 2015-03-25 |
JP6215477B2 (ja) | 2017-10-18 |
JP2016534527A (ja) | 2016-11-04 |
CN104769744B (zh) | 2017-09-08 |
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