CN116330786A - Flame-retardant film, current collector, electrode and battery - Google Patents
Flame-retardant film, current collector, electrode and battery Download PDFInfo
- Publication number
- CN116330786A CN116330786A CN202310337817.7A CN202310337817A CN116330786A CN 116330786 A CN116330786 A CN 116330786A CN 202310337817 A CN202310337817 A CN 202310337817A CN 116330786 A CN116330786 A CN 116330786A
- Authority
- CN
- China
- Prior art keywords
- flame
- retardant
- layer
- film
- flame retardant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003063 flame retardant Substances 0.000 title claims abstract description 89
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 239000010410 layer Substances 0.000 claims abstract description 84
- -1 polytetrafluoroethylene Polymers 0.000 claims abstract description 54
- 239000004793 Polystyrene Substances 0.000 claims abstract description 22
- 229920002223 polystyrene Polymers 0.000 claims abstract description 22
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 21
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 20
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 20
- AHZJKOKFZJYCLG-UHFFFAOYSA-K trifluoromethanesulfonate;ytterbium(3+) Chemical compound [Yb+3].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F AHZJKOKFZJYCLG-UHFFFAOYSA-K 0.000 claims abstract description 17
- LVTHXRLARFLXNR-UHFFFAOYSA-M potassium;1,1,2,2,3,3,4,4,4-nonafluorobutane-1-sulfonate Chemical compound [K+].[O-]S(=O)(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F LVTHXRLARFLXNR-UHFFFAOYSA-M 0.000 claims abstract description 15
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims description 26
- 239000002184 metal Substances 0.000 claims description 26
- 239000002994 raw material Substances 0.000 claims description 14
- 239000011241 protective layer Substances 0.000 claims description 13
- 239000011267 electrode slurry Substances 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 239000011149 active material Substances 0.000 claims description 6
- 239000002033 PVDF binder Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 2
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims description 2
- 239000004642 Polyimide Substances 0.000 claims description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 claims description 2
- 229920002647 polyamide Polymers 0.000 claims description 2
- 239000011112 polyethylene naphthalate Substances 0.000 claims description 2
- 229920001721 polyimide Polymers 0.000 claims description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 229910052719 titanium Inorganic materials 0.000 claims description 2
- 239000010936 titanium Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 229920013636 polyphenyl ether polymer Polymers 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 13
- 238000007731 hot pressing Methods 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 239000002356 single layer Substances 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 description 17
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 238000001035 drying Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000011230 binding agent Substances 0.000 description 8
- 150000003254 radicals Chemical class 0.000 description 8
- 239000002002 slurry Substances 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 239000006258 conductive agent Substances 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 125000004429 atom Chemical group 0.000 description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000009998 heat setting Methods 0.000 description 3
- 238000001883 metal evaporation Methods 0.000 description 3
- 239000002562 thickening agent Substances 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
- 238000007738 vacuum evaporation Methods 0.000 description 3
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical group COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007773 negative electrode material Substances 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229920003048 styrene butadiene rubber Polymers 0.000 description 2
- 229910013872 LiPF Inorganic materials 0.000 description 1
- 101150058243 Lipf gene Proteins 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical group [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000037427 ion transport Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920006380 polyphenylene oxide Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- ITMCEJHCFYSIIV-UHFFFAOYSA-M triflate Chemical compound [O-]S(=O)(=O)C(F)(F)F ITMCEJHCFYSIIV-UHFFFAOYSA-M 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/20—Inorganic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/20—Inorganic coating
- B32B2255/205—Metallic coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Composite Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Laminated Bodies (AREA)
Abstract
The invention relates to the technical field of flame-retardant batteries, and discloses a flame-retardant film, a current collector, an electrode and a battery; the invention prepares an inner layer film by blending polytetrafluoroethylene and potassium perfluorobutyl sulfonate, prepares an intermediate layer film by blending polybutylene terephthalate and ytterbium trifluoromethane sulfonate, prepares an outer layer film by blending polystyrene and triphenyl phosphate, and prepares a flame-retardant film by hot-pressing the three layers of films. Compared with the traditional single-layer flame-retardant film, the sandwich-type multi-layer flame-retardant film prepared by the invention has mutual synergistic effect and more excellent flame retardance and mechanical property.
Description
Technical Field
The invention relates to the technical field of flame-retardant batteries, in particular to a flame-retardant film, a current collector, an electrode and a battery.
Background
Conventionally, there has been a contradiction between high safety and high energy density. Whether the flame retardant is added into electrolyte, a diaphragm or anode and cathode materials, new substances are introduced into a lithium ion transmission path, so that ion conduction is influenced, the battery performance is further influenced, and finally the energy density is reduced.
From the internal structural point of view, lithium ions pass from one pole of the electrode material, through the electrolyte, across the separator, and to the other pole during the charge and discharge of the battery. Thus, the performance of the battery is affected by the addition of new substances during this process. For example, adding a flame retardant to the electrolyte may reduce the conductivity of the electrolyte. Then a current collector that does not participate in the lithium ion transport process is the ideal location for storing the flame retardant.
At present, the traditional pure metal film takes high-purity metal as a raw material, and flame retardant substances are difficult to add in a compact metal layer, so that the invention has important significance.
Disclosure of Invention
The invention aims to provide a flame-retardant film, a current collector, an electrode and a battery, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
the flame-retardant film comprises the following raw materials in percentage by mass: 85.0 to 99.0 percent of polymer and 1.0 to 15.0 percent of flame retardant.
Further, the flame-retardant film is prepared by mixing a polymer and a flame retardant and then adopting a melt-biaxially stretching method to obtain the flame-retardant film.
Further, the polymer is one or more of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyimide, polypropylene, polyvinyl chloride, polyvinylidene fluoride, polytetrafluoroethylene, polyphenylene sulfide, polyphenylene oxide, polystyrene and polyamide.
Further, the flame retardant is one or more of ytterbium triflate, potassium perfluorobutyl sulfonate and triphenyl phosphate.
Further, the thickness of the flame-retardant film is 1 μm to 5 μm.
Further, the flame-retardant film is characterized in that a polybutylene terephthalate layer and a polystyrene layer are respectively and symmetrically arranged on two sides of a polytetrafluoroethylene layer in sequence, and the polybutylene terephthalate layer is arranged between the polytetrafluoroethylene layer and the polystyrene layer;
further, the polytetrafluoroethylene layer comprises the following raw materials in percentage by mass: 85.0 to 99.0 percent of polytetrafluoroethylene and 1.0 to 15.0 percent of potassium perfluorobutyl sulfonate; the polybutylene terephthalate layer comprises the following raw materials in percentage by mass: 85.0 to 99.0 percent of polybutylene terephthalate and 1.0 to 15.0 percent of ytterbium triflate; the polystyrene layer comprises the following raw materials in percentage by mass: 85.0 to 99.0 percent of polystyrene and 1.0 to 15.0 percent of triphenyl phosphate;
further, in one side of the composite flame-retardant diaphragm, the mass ratio of polytetrafluoroethylene in the flame-retardant diaphragm to polybutylene terephthalate in the polybutylene terephthalate layer to polystyrene in the polystyrene layer is 3: (2-3): and 4, the other side of the composite flame-retardant diaphragm is the same as the other side of the composite flame-retardant diaphragm.
Further, the inner layer comprises the following raw materials in percentage by mass: 85.0 to 99.0 percent of polytetrafluoroethylene and 1.0 to 15.0 percent of potassium perfluorobutyl sulfonate; the intermediate layer comprises the following raw materials in percentage by mass: 85.0 to 99.0 percent of polybutylene terephthalate and 1.0 to 15.0 percent of ytterbium triflate; the outer layer comprises the following raw materials in percentage by mass: 85.0 to 99.0 percent of polystyrene and 1.0 to 15.0 percent of triphenyl phosphate.
Further, the polytetrafluoroethylene: polybutylene terephthalate: the mass ratio of the polystyrene is 3: (2-3): 4.
a flame-retardant current collector is prepared by the following method: adding conductive carbon black into water, and stirring for 100min to obtain uniform conductive carbon black slurry; after stirring uniformly, adding aluminum oxide and silicon carbide into a solvent, stirring uniformly to obtain first slurry, adding a binder, stirring uniformly to obtain second slurry, coating the obtained second slurry on the surface of a metal layer through a coating system, drying, and controlling the thickness of a final protective layer by controlling the coating amount to obtain the flame-retardant current collector.
Further, the metal layer is prepared according to the following method: and (3) placing the prepared flame-retardant film in a vacuum evaporation cabin, melting and evaporating high-purity copper wires (with purity more than 99.99%) in a metal evaporation chamber at a high temperature of 1500 ℃, and depositing evaporated metal atoms on two opposite surfaces of a modified layer through a cooling system in a vacuum coating chamber to form a copper metal conductive layer with thickness of 1 mu m, thereby obtaining a metal layer.
Further, the thickness of the metal layer is 500 nm-2000 nm.
Further, the material of the metal layer comprises one or more of titanium, silver, aluminum alloy, aluminum, nickel alloy, nickel, copper alloy and copper.
Further, a protective layer is arranged on the surface of the metal layer.
Further, a protective layer is arranged on the surface of the metal layer, and the thickness of the protective layer is 10 nm-200 nm.
Further, a protective layer is arranged on the surface of the metal layer, and the material of the protective layer comprises one or two of aluminum oxide and silicon carbide.
A positive electrode prepared according to the method of: and adding an active material, a conductive agent and a binder into N-methylpyrrolidone (NMP), uniformly mixing to prepare positive electrode slurry, uniformly coating the positive electrode slurry on the surface of a flame-retardant current collector, and drying to obtain the positive electrode plate.
Further, the active material is NMC811, the conductive agent is conductive carbon black, and the binder is polyvinylidene fluoride (PVDF).
A negative electrode sheet is prepared by the following steps: adding a negative electrode active material, a conductive agent, a thickening agent and a binder into deionized water, uniformly mixing to obtain negative electrode slurry, uniformly coating the negative electrode slurry on the surface of a flame-retardant current collector, and drying to obtain the negative electrode plate.
Further, the active material is graphite powder, the conductive agent is conductive carbon black, the thickener is sodium carboxymethyl cellulose (CMC), and the binder is Styrene Butadiene Rubber (SBR).
A flame retardant battery prepared according to the following method:
and laminating the positive plate, the negative plate and the diaphragm to obtain a laminated body cell, ultrasonically welding the tabs of all the positive plates of the laminated body cell, ultrasonically welding the tabs of all the negative plates, placing the laminated body cell into a shell, injecting electrolyte, and sealing to obtain the flame-retardant battery.
Further, the electrolyte is dimethyl carbonate (DMC), ethylene Carbonate (EC), ethylmethyl carbonate (EMC) and lithium hexafluorophosphate (LiPF) with a concentration of 1M 6 ) Any one of the following.
Compared with the prior art, the invention has the following beneficial effects: the invention prepares an inner layer film by blending polytetrafluoroethylene and potassium perfluorobutyl sulfonate, prepares an intermediate layer film by blending polybutylene terephthalate and ytterbium trifluoromethane sulfonate, prepares an outer layer film by blending polystyrene and triphenyl phosphate, and prepares a flame-retardant film by hot-pressing the three layers of films.
Compared with the traditional single-layer flame-retardant film, the sandwich-type multi-layer flame-retardant film prepared by the invention has mutual synergistic effect, and plays roles of gas-phase flame retardance and solid phase isolation in a synergistic manner, so that the flame retardant effect is effectively improved, and in addition, the mechanical property of the film is effectively improved when the flame retardant is added into the film;
the fluorocarbon bond in the structure of the potassium perfluorobutyl sulfonate in the inner layer can be broken when the potassium perfluorobutyl sulfonate is heated, so that fluorine free radicals are released, free active free radicals generated by the polymer material due to thermal degradation are effectively captured, the concentration of the free radicals can be effectively reduced, the free radical chain reaction of combustion can be relieved or stopped, flame propagation is inhibited, and polytetrafluoroethylene is used as a carrier of the potassium perfluorobutyl sulfonate, so that the potassium perfluorobutyl sulfonate can be helped to release the fluorine free radicals in the heating process;
ytterbium triflate in the middle layer has high thermodynamic stability and high carbon residue below 600 ℃, and can form a charring layer on the surface of the current collector after combustion so as to play a role of insulating heat, so that the heat release rate is gradually reduced; the free radical generated by the substance in the thermal degradation process has stronger capturing capability, which is the result of the combined action of anions and cations in the rare earth compound, and the trifluoro methane sulfonate (anion) is extremely likely to generate free radical under the high temperature condition due to the strong electron withdrawing capability of fluorine atoms so as to capture the free radical generated by the base film;
the triphenyl phosphate in the outer layer can promote dehydration and carbonization of the substrate material, so that the high polymer material cannot generate combustible gas, and the nonvolatile phosphorus compound plays a role of a coagulant, so that the carbide forms a protective carbon film to isolate external air and heat, and polystyrene serving as a carrier of the triphenyl phosphate can provide sufficient support for the carbon film formed after the triphenyl phosphate is heated and carbonized while helping dispersion, so that the carbon film is not easy to collapse, and the stability of the carbon layer is greatly enhanced.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following examples, polytetrafluoroethylene CAS registry number 9002-84-0, polybutylene terephthalate CAS registry number 26062-94-2, polystyrene CAS registry number 9003-53-6, polyethylene terephthalate CAS registry number 25038-59-9.
Example 1: preparation of flame-retardant film: s1: after 95.0g of polyethylene terephthalate and 5.0g of ytterbium triflate are mixed, a melt-biaxially oriented method is adopted to prepare a film, and the method comprises the following steps: crystallization drying, melt extrusion, casting, longitudinal stretching, transverse stretching and heat setting; preparing a film with a thickness of 5 mu m;
s2: placing the prepared flame-retardant film in a vacuum evaporation cabin, melting and evaporating high-purity copper wires (purity is more than 99.99%) in a metal evaporation chamber at a high temperature of 1500 ℃, and depositing evaporated metal atoms on two opposite surfaces of a modified layer through a cooling system in a vacuum coating chamber to form a copper metal layer with a thickness of 1 mu m;
example 2: preparation of flame-retardant film: substantially the same as in example 1, the main difference is that: the flame retardant was 7.0% ytterbium triflate.
Example 3: preparation of flame-retardant film: substantially the same as in example 1, the main difference is that: the flame retardant is 10.0% ytterbium triflate.
Example 4: preparation of flame-retardant film: substantially the same as in example 1, the main difference is that: the flame retardant is 15.0% ytterbium triflate.
Example 5: preparation of flame-retardant film: substantially the same as in example 1, the main difference is that: the flame retardant is 3% ytterbium triflate and 4% potassium perfluorobutyl sulfonate.
Example 6: preparation of flame-retardant film: substantially the same as in example 1, the main difference is that: the flame retardant is 3% ytterbium triflate 4% triphenyl phosphate.
Example 7: preparation of flame-retardant film: substantially the same as in example 1, the main difference is that: the flame retardant was 7% triphenyl phosphate.
Example 8: preparation of flame-retardant film: substantially the same as in example 1, the main difference is that: the flame retardant was 7% potassium perfluorobutyl sulfonate.
Example 9: preparation of a flame-retardant battery: s1: the preparation of the film was carried out by melt-biaxially stretching after mixing 71.25g of polytetrafluoroethylene and 3.75g of potassium perfluorobutyl sulfonate, 47.5g of polybutylene terephthalate and 2.5g of ytterbium triflate, 95g of polystyrene and 5g of triphenyl phosphate, respectively, comprising the steps of: crystallizing, drying, melting, extruding, casting, longitudinal stretching, transverse stretching and heat setting to obtain inner layer, middle layer and outer layer film, setting the middle layer on two sides of the inner layer, setting the outer layer on the outer layers of the two middle layers, hot pressing to obtain the film with thickness of 5 microns.
S2: placing the prepared flame-retardant film in a vacuum evaporation cabin, melting and evaporating high-purity copper wires (purity is more than 99.99%) in a metal evaporation chamber at a high temperature of 1500 ℃, and depositing evaporated metal atoms on two opposite surfaces of a modified layer through a cooling system in a vacuum coating chamber to form a copper metal layer with a thickness of 1 mu m;
s3: adding 2kg of conductive carbon black into 20kg of water, and stirring for 100min to obtain uniform conductive carbon black slurry; after stirring uniformly, adding 1g of aluminum oxide and 1g of silicon carbide into a solvent, stirring uniformly to obtain a first slurry, adding a binder, stirring uniformly to obtain a second slurry, coating the obtained second slurry on the surface of a metal layer through a coating system, drying, and controlling the thickness of a final protective layer by controlling the coating amount to obtain a current collector with the thickness of the protective layer of 100 nm;
s4: the preparation method of the adopted positive plate comprises the following steps: adding 96g of active material NMC811, 2g of conductive agent carbon black and 2g of binder PVDF into 80g of NMP, uniformly mixing to prepare ternary positive electrode slurry, uniformly coating the ternary positive electrode slurry on the surface of the obtained composite aluminum foil current collector, and drying to obtain a positive electrode plate;
s5: the preparation method of the adopted negative plate comprises the following steps: adding 95.4g of negative electrode active material graphite powder, 2.6g of conductive agent carbon black, 1g of thickener CMC and 1g of binder SBR into 90g of deionized water, uniformly mixing to obtain negative electrode slurry, uniformly coating the negative electrode slurry on the surface of a copper foil of a negative electrode plate current collector with the thickness of 10 mu m, and drying to obtain a negative electrode plate;
s6: and laminating the positive plate, the negative plate and the diaphragm to obtain a laminated body cell, ultrasonically welding the tabs of all the positive plates of the laminated body cell, ultrasonically welding the tabs of all the negative plates, placing the laminated body cell into a shell, injecting dimethyl carbonate, and sealing to obtain the battery.
Comparative example 1: preparation of flame-retardant film: substantially the same as in example 1, the main difference is that: the flame retardant is 20% ytterbium triflate.
Comparative example 2: preparation of flame-retardant film: substantially the same as in example 1, the main difference is that: no flame retardant was added.
Comparative example 3: preparation of a flame-retardant battery: substantially the same as in example 9, the main difference is that: s1: the preparation of the film was carried out by melt-biaxially stretching after mixing 71.25g of polytetrafluoroethylene and 3.75g of potassium perfluorobutyl sulfonate, 47.5g of polybutylene terephthalate and 2.5g of ytterbium triflate, 125g of polystyrene and 15g of triphenyl phosphate, respectively, comprising the steps of: crystallizing, drying, melting, extruding, casting, longitudinal stretching, transverse stretching and heat setting to obtain inner layer, middle layer and outer layer film, setting the middle layer on two sides of the inner layer, setting the outer layer on the outer layers of the two middle layers, hot pressing to obtain the film with thickness of 5 microns.
Comparative example 4: preparation of a flame-retardant battery: substantially the same as in example 9, the main difference is that: exchanging the inner layer raw material and the outer layer raw material.
And (3) testing:
the tensile strength and elongation at break of the films with metal layers prepared in examples 1 to 9 and the films with metal layers prepared in comparative examples 1 to 4 were tested with reference to national standard GB/T1040.3-2006, in which the data are longitudinal direction data.
Needling test:
the films of examples 1 to 8 and the batteries prepared in comparative examples 1 to 2, as well as the batteries described in examples 9 and comparative examples 3 to 4 were each tested by selecting 10 samples, standing for 3 hours after being fully charged with 0.7C at normal temperature, and then performing a needling test according to GB/T31485-2015 without smoking and without ignition as passing the test, and the needling test passing rate=the number of lithium ion batteries passing the test/10, and the test results are shown in table 1.
Surface temperature rise:
the batteries prepared in examples 1-8 and comparative examples 1-2, and the batteries described in examples 9 and comparative examples 3-4 were tested for surface temperature rise using a real-time temperature tester, a thermocouple-induction probe of the temperature tester was placed on the surfaces of the batteries prepared in examples and comparative examples, temperature detection was performed, and the maximum surface temperature rise was calculated.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The flame-retardant film is characterized by comprising the following raw materials in percentage by mass: 85.0 to 99.0 percent of polymer and 1.0 to 15.0 percent of flame retardant.
2. A flame retardant film according to claim 1, wherein: the polymer is one or more of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyimide, polypropylene, polyvinyl chloride, polyvinylidene fluoride, polytetrafluoroethylene, polyphenylene sulfide, polyphenyl ether, polystyrene and polyamide.
3. A flame retardant film according to claim 1, wherein: the flame retardant is one or more of ytterbium triflate, potassium perfluorobutyl sulfonate and triphenyl phosphate.
4. A flame retardant film according to claim 1, wherein: the thickness of the flame-retardant film is 1-5 mu m.
5. The flame retardant film of claim 4, wherein: the flame-retardant film is characterized in that a polybutylene terephthalate layer and a polystyrene layer are respectively and symmetrically arranged on two sides of a polytetrafluoroethylene layer in sequence, and the polybutylene terephthalate layer is arranged between the polytetrafluoroethylene layer and the polystyrene layer; the polytetrafluoroethylene layer comprises the following raw materials in percentage by mass: 85.0 to 99.0 percent of polytetrafluoroethylene and 1.0 to 15.0 percent of potassium perfluorobutyl sulfonate; the polybutylene terephthalate layer comprises the following raw materials in percentage by mass: 85.0 to 99.0 percent of polybutylene terephthalate and 1.0 to 15.0 percent of ytterbium triflate; the polystyrene layer comprises the following raw materials in percentage by mass: 85.0 to 99.0 percent of polystyrene and 1.0 to 15.0 percent of triphenyl phosphate; in one side of the composite flame-retardant diaphragm, the mass ratio of polytetrafluoroethylene in the flame-retardant diaphragm to polybutylene terephthalate in the polybutylene terephthalate layer to polystyrene in the polystyrene layer is 3:
(2-3): and 4, the other side of the composite flame-retardant diaphragm is the same as the other side of the composite flame-retardant diaphragm.
6. A flame retardant current collector, characterized by: comprising a flame-retardant film and a metal layer positioned on at least one side of the flame-retardant film, wherein the flame-retardant film is as claimed in any one of claims 1 to 5.
7. A flame retardant current collector as in claim 6, wherein: comprising at least one of the following features (1) to (5):
(1) The thickness of the metal layer is 500 nm-2000 nm;
(2) The material of the metal layer comprises one or more of titanium, silver, aluminum alloy, aluminum, nickel alloy, nickel, copper alloy and copper;
(3) The surface of the metal layer is provided with a protective layer;
(4) The surface of the metal layer is provided with a protective layer, and the thickness of the protective layer is 10 nm-200 nm;
(5) The surface of the metal layer is provided with a protective layer, and the material of the protective layer comprises one or two of aluminum oxide and silicon carbide.
8. A flame retardant electrode, characterized by: a flame retardant current collector comprising the flame retardant current collector of any of claims 7, and an active material layer attached to at least one side of the flame retardant current collector;
the active material layer is positive electrode slurry or negative electrode slurry.
9. A flame retardant battery, characterized by: a flame retardant electrode comprising the composition of claim 8.
10. The utility model provides a fire-retardant type power consumption device which characterized in that: a flame retardant battery comprising the flame retardant battery of claim 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310337817.7A CN116330786A (en) | 2023-03-31 | 2023-03-31 | Flame-retardant film, current collector, electrode and battery |
| PCT/CN2023/141123 WO2024198560A1 (en) | 2023-03-31 | 2023-12-22 | Flame-retardant thin film, current collector, electrode, and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310337817.7A CN116330786A (en) | 2023-03-31 | 2023-03-31 | Flame-retardant film, current collector, electrode and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116330786A true CN116330786A (en) | 2023-06-27 |
Family
ID=86877089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310337817.7A Pending CN116330786A (en) | 2023-03-31 | 2023-03-31 | Flame-retardant film, current collector, electrode and battery |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116330786A (en) |
| WO (1) | WO2024198560A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024198560A1 (en) * | 2023-03-31 | 2024-10-03 | 江阴纳力新材料科技有限公司 | Flame-retardant thin film, current collector, electrode, and battery |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110943228B (en) * | 2019-05-31 | 2021-06-08 | 宁德时代新能源科技股份有限公司 | Negative current collector, negative pole piece and electrochemical device |
| CN111048788B (en) * | 2019-12-26 | 2021-06-01 | 珠海冠宇电池股份有限公司 | Current collector and preparation method and application thereof |
| WO2021211701A1 (en) * | 2020-04-15 | 2021-10-21 | The Board Of Trustees Of The Leland Stanford Junior University | Ultralight, fire-extinguishing and temperature modulated current collector devices and method therefor |
| US20220190346A1 (en) * | 2020-12-14 | 2022-06-16 | Global Graphene Group, Inc. | Lithium-protecting polymer composite layer for a lithium metal secondary battery and manufacturing method |
| CN112786895A (en) * | 2021-01-22 | 2021-05-11 | 华中科技大学 | Lithium ion battery, novel current collector and preparation method thereof |
| CN114156486B (en) * | 2021-10-29 | 2024-05-03 | 上海空间电源研究所 | Light flame-retardant current collector, preparation method thereof, electrode and battery |
| CN114597338A (en) * | 2022-03-31 | 2022-06-07 | 蜂巢能源科技股份有限公司 | Composite current collector and preparation method and application thereof |
| CN218677203U (en) * | 2022-11-03 | 2023-03-21 | 蔚来汽车科技(安徽)有限公司 | Composite current collector, lithium ion battery and vehicle |
| CN116330786A (en) * | 2023-03-31 | 2023-06-27 | 江阴纳力新材料科技有限公司 | Flame-retardant film, current collector, electrode and battery |
-
2023
- 2023-03-31 CN CN202310337817.7A patent/CN116330786A/en active Pending
- 2023-12-22 WO PCT/CN2023/141123 patent/WO2024198560A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024198560A1 (en) * | 2023-03-31 | 2024-10-03 | 江阴纳力新材料科技有限公司 | Flame-retardant thin film, current collector, electrode, and battery |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024198560A1 (en) | 2024-10-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2019434099B2 (en) | Hybrid solid-liquid electrolyte lithium storage battery | |
| CN113839093A (en) | Non-aqueous electrolyte of lithium ion battery and application thereof | |
| CN111916706A (en) | Lithium ion secondary battery, method for manufacturing same, and electric vehicle, consumer electronic product, and mechanical device including same | |
| JP7106762B2 (en) | Positive electrode sheet, manufacturing method thereof, and lithium ion secondary battery | |
| CN115832195A (en) | Porous composite foil, positive pole piece, negative pole piece, semi-solid lithium ion battery and preparation method | |
| CN111048749B (en) | Negative pole piece, lithium ion battery and manufacturing method thereof | |
| CN113889595A (en) | Preparation method of solid electrolyte coated graphite composite material | |
| CN110690398A (en) | Multifunctional composite diaphragm for high-temperature lithium-sulfur battery, and preparation method and application thereof | |
| CN111682258B (en) | Dielectric electrolyte, lithium ion battery and preparation method thereof | |
| Shi et al. | Sandwich-like solid composite electrolytes employed as bifunctional separators for safe lithium metal batteries with excellent cycling performance | |
| CN112436233A (en) | Functional diaphragm, preparation method of functional diaphragm and lithium metal battery | |
| CN116330786A (en) | Flame-retardant film, current collector, electrode and battery | |
| CN115548461A (en) | Production method of semi-dry split type diaphragm-free all-solid-state lithium battery | |
| CN115093834B (en) | Phase change material and preparation method and application thereof | |
| CN116914083A (en) | Battery and electric equipment | |
| CN116525835A (en) | Composite current collector, positive plate and secondary battery | |
| CN112216812B (en) | Lithium ion battery repeating unit, lithium ion battery, using method of lithium ion battery, battery module and automobile | |
| CN114300649A (en) | Safety coating, positive pole piece and application | |
| CN112397771B (en) | Solid electrolyte membrane, preparation method thereof and application thereof in solid lithium-sulfur battery | |
| CN115064823B (en) | Battery cell | |
| CN115832202B (en) | Negative electrode plate, lithium ion battery and preparation method of lithium ion battery | |
| CN111224161B (en) | Method for improving low-temperature service performance of lithium ion battery by electrolyte containing additive | |
| WO2023004820A1 (en) | Isolation film and preparation method therefor, electrochemical apparatus, electrochemical device, and electric apparatus | |
| US10826066B2 (en) | Lithium-ion secondary battery | |
| KR102680032B1 (en) | Solid electrolyte for lithium secondary battery, method for preparing the same and lithium secondary battery including the solid electrolyte |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |