CN110137497A - A kind of negative electrode binder and preparation method thereof and lithium ion battery - Google Patents
A kind of negative electrode binder and preparation method thereof and lithium ion battery Download PDFInfo
- Publication number
- CN110137497A CN110137497A CN201910391134.3A CN201910391134A CN110137497A CN 110137497 A CN110137497 A CN 110137497A CN 201910391134 A CN201910391134 A CN 201910391134A CN 110137497 A CN110137497 A CN 110137497A
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- China
- Prior art keywords
- acrylate
- monomer
- polycarbonate
- negative electrode
- electrode binder
- Prior art date
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 22
- 239000011883 electrode binding agent Substances 0.000 title claims description 27
- 238000002360 preparation method Methods 0.000 title claims description 14
- 239000004417 polycarbonate Substances 0.000 claims abstract description 46
- 229920000515 polycarbonate Polymers 0.000 claims abstract description 46
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 13
- 150000001252 acrylic acid derivatives Chemical class 0.000 claims abstract description 9
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 86
- 238000003756 stirring Methods 0.000 claims description 49
- 239000000178 monomer Substances 0.000 claims description 47
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 43
- 229920000058 polyacrylate Polymers 0.000 claims description 39
- 239000000839 emulsion Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000006185 dispersion Substances 0.000 claims description 24
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical group [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 22
- 239000008367 deionised water Substances 0.000 claims description 22
- 229910021641 deionized water Inorganic materials 0.000 claims description 22
- 238000004090 dissolution Methods 0.000 claims description 22
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 20
- 239000003995 emulsifying agent Substances 0.000 claims description 19
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 18
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 13
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 13
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 11
- 239000000908 ammonium hydroxide Substances 0.000 claims description 11
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 11
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 11
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical group CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 claims description 10
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 10
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 9
- 239000003999 initiator Substances 0.000 claims description 9
- 150000002148 esters Chemical class 0.000 claims description 8
- -1 2- ethylhexyl Chemical group 0.000 claims description 7
- 230000001804 emulsifying effect Effects 0.000 claims description 7
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 6
- 239000002202 Polyethylene glycol Substances 0.000 claims description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000872 buffer Substances 0.000 claims description 6
- 238000004132 cross linking Methods 0.000 claims description 6
- 229920001223 polyethylene glycol Polymers 0.000 claims description 6
- 229940117958 vinyl acetate Drugs 0.000 claims description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 5
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 claims description 4
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- HGXJDMCMYLEZMJ-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOOC(=O)C(C)(C)C HGXJDMCMYLEZMJ-UHFFFAOYSA-N 0.000 claims description 3
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 claims description 3
- 125000000094 2-phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 claims description 3
- QZPSOSOOLFHYRR-UHFFFAOYSA-N 3-hydroxypropyl prop-2-enoate Chemical compound OCCCOC(=O)C=C QZPSOSOOLFHYRR-UHFFFAOYSA-N 0.000 claims description 3
- VPFIZGUCPQPXIJ-UHFFFAOYSA-N C(C)(=O)OC=C.C(C)(=O)OCOC(C)=O Chemical compound C(C)(=O)OC=C.C(C)(=O)OCOC(C)=O VPFIZGUCPQPXIJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000012874 anionic emulsifier Substances 0.000 claims description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 3
- 125000002091 cationic group Chemical group 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- LRMHFDNWKCSEQU-UHFFFAOYSA-N ethoxyethane;phenol Chemical compound CCOCC.OC1=CC=CC=C1 LRMHFDNWKCSEQU-UHFFFAOYSA-N 0.000 claims description 3
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 3
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 claims description 3
- 125000005395 methacrylic acid group Chemical group 0.000 claims description 3
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 claims description 3
- 125000004344 phenylpropyl group Chemical group 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- 235000019394 potassium persulphate Nutrition 0.000 claims description 3
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 claims description 2
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical group CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 claims description 2
- 150000001336 alkenes Chemical class 0.000 claims description 2
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 claims description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 2
- BWJUFXUULUEGMA-UHFFFAOYSA-N propan-2-yl propan-2-yloxycarbonyloxy carbonate Chemical compound CC(C)OC(=O)OOC(=O)OC(C)C BWJUFXUULUEGMA-UHFFFAOYSA-N 0.000 claims description 2
- CCJAYIGMMRQRAO-UHFFFAOYSA-N 2-[4-[(2-hydroxyphenyl)methylideneamino]butyliminomethyl]phenol Chemical compound OC1=CC=CC=C1C=NCCCCN=CC1=CC=CC=C1O CCJAYIGMMRQRAO-UHFFFAOYSA-N 0.000 claims 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims 1
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 claims 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims 1
- 125000004494 ethyl ester group Chemical group 0.000 claims 1
- 239000011230 binding agent Substances 0.000 abstract description 17
- 239000000853 adhesive Substances 0.000 abstract description 6
- 230000001070 adhesive effect Effects 0.000 abstract description 6
- 239000003792 electrolyte Substances 0.000 abstract description 5
- 238000007086 side reaction Methods 0.000 abstract description 2
- 238000004945 emulsification Methods 0.000 description 28
- 239000007788 liquid Substances 0.000 description 24
- 239000007864 aqueous solution Substances 0.000 description 16
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 14
- SNRUBQQJIBEYMU-UHFFFAOYSA-N dodecane Chemical compound CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 12
- 229910052744 lithium Inorganic materials 0.000 description 12
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical group OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 description 11
- 239000006071 cream Substances 0.000 description 9
- 229920000642 polymer Polymers 0.000 description 9
- 238000010992 reflux Methods 0.000 description 8
- 229910052938 sodium sulfate Inorganic materials 0.000 description 7
- 235000011152 sodium sulphate Nutrition 0.000 description 7
- 239000000243 solution Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- CDOUZKKFHVEKRI-UHFFFAOYSA-N 3-bromo-n-[(prop-2-enoylamino)methyl]propanamide Chemical compound BrCCC(=O)NCNC(=O)C=C CDOUZKKFHVEKRI-UHFFFAOYSA-N 0.000 description 2
- GNSFRPWPOGYVLO-UHFFFAOYSA-N 3-hydroxypropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCO GNSFRPWPOGYVLO-UHFFFAOYSA-N 0.000 description 2
- NQSLZEHVGKWKAY-UHFFFAOYSA-N 6-methylheptyl 2-methylprop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C(C)=C NQSLZEHVGKWKAY-UHFFFAOYSA-N 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000000536 complexating effect Effects 0.000 description 2
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 2
- QWVBGCWRHHXMRM-UHFFFAOYSA-N hexadecoxycarbonyloxy hexadecyl carbonate Chemical compound CCCCCCCCCCCCCCCCOC(=O)OOC(=O)OCCCCCCCCCCCCCCCC QWVBGCWRHHXMRM-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012875 nonionic emulsifier Substances 0.000 description 2
- VKEQBMCRQDSRET-UHFFFAOYSA-N Methylone Chemical compound CNC(C)C(=O)C1=CC=C2OCOC2=C1 VKEQBMCRQDSRET-UHFFFAOYSA-N 0.000 description 1
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical compound OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 description 1
- PYGXUPRQBBNETH-UHFFFAOYSA-N acetic acid;2-hydroxypropyl prop-2-enoate Chemical compound CC(O)=O.CC(O)COC(=O)C=C PYGXUPRQBBNETH-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- JMPVESVJOFYWTB-UHFFFAOYSA-N dipropan-2-yl carbonate Chemical class CC(C)OC(=O)OC(C)C JMPVESVJOFYWTB-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 125000000400 lauroyl group Chemical group O=C([*])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N methanol Natural products OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Classifications
-
- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/027—Negative electrodes
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The present invention provides a kind of bonder for lithium ion batteries, belong to technical field of lithium ion, specific technical solution is as follows: a kind of bonder for lithium ion batteries, the binder is polycarbonate modified acrylate, the polycarbonate modified acrylate includes polycarbonate and acrylate, and the percent by volume of the polycarbonate is 5-15%.The stability of polycarbonate modified acrylate adhesives at high temperature is more preferable, is not easy that side reaction occurs and produces gas with electrolyte, improves the high-temperature storage performance of battery.No matter being single use or being used in mixed way with SBR, the cryogenic property of battery core can be substantially improved；Acrylate adhesives are compared simultaneously, and the high-temperature storage performance and cyclical stability of battery are obviously more preferable.
Description
Technical field
The invention belongs to technical field of lithium ion more particularly to a kind of negative electrode binder and preparation method thereof and lithium from
Sub- battery.
Background technique
Since lithium ion battery is since entry into market, the advantages that with its service life is long, specific capacity is big, memory-less effect, obtain
It is widely applied.That there are capacity is low for the use of lithium ion battery low temperature, decaying is serious, circulating ratio performance is poor, it is bright to analyse lithium phenomenon
Aobvious, the problems such as removal lithium embedded is uneven.However, the cryogenic property of lithium ion battery is inferior to be brought as application field is constantly expanded
Restriction it is further obvious.
It is reported that 31.5% or so when at -20 DEG C, discharge capacity of lithium ion battery only has room temperature.Conventional lithium ion electricity
Pond operating temperature is between -20~+55 DEG C.But in fields such as aerospace, military project, electric vehicles, it is desirable that battery can be at -40 DEG C
It works normally.Therefore, improve lithium ion battery cryogenic properties to be of great significance.
Binder influences the performance of battery equally very big other than playing the role of bonding electrode.Such as compared to
Traditional butadiene-styrene rubber (SBR) binder, esters of acrylic acid binder are improved due to containing carboxyl functional group to lithium ion
Conducting power, the low temperature electrical property for reducing the internal resistance of battery, improving battery；At the same time, the corruption of electrolyte at high temperature
The problem of under erosion, the high temperature storage of battery is easy to produce gas, bulging, leads to battery high-temperature storage failure.
Summary of the invention
The first purpose of this invention is to provide a kind of negative electrode binder that it is gentle to solve esters of acrylic acid binder height
The problem of storage failure, while ensuring that the cryogenic property of battery is not affected.
Second object of the present invention is to provide a kind of preparation method of negative electrode binder.
Third object of the present invention is to provide a kind of lithium ion battery containing the negative electrode binder.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of negative electrode binder, the negative electrode binder are polycarbonate modified acrylate, and the polycarbonate changes
Property acrylate include polycarbonate and polyacrylate, the percent by volume of the polycarbonate is 5-15%.
Further, the structural formula of the polycarbonate such as (I) formula:
Wherein: R be benzyl, phenethyl, phenylpropyl, to the one or two of the first and second base of benzene.
A kind of preparation method of negative electrode binder, specifically includes the following steps:
Step 1: emulsifier and initiator are added in deionized water, and after stirring to all dissolutions, acrylate list is added
Body bonds monomer and cross-linking monomer, obtains the pre-emulsion of monomer after stirring and emulsifying；
Step 2: being added emulsifier, buffer and deionized water in a kettle, and stirring to all dissolutions is placed in 50 DEG C
In water-bath；The pre-emulsion of initiator solution and the monomer is added dropwise in reaction kettle, for warming-in-water to 85 DEG C, polymerization is anti-
After answering 2h, it is down to room temperature, obtains polyacrylate dispersion after being 7-9 with ammonium hydroxide tune pH value；
Step 3: polycarbonate being added into polyacrylate dispersion, continues stirring 2h and is allowed to be thoroughly mixed to obtain poly- carbon
The modified polyacrylate of acid esters, wherein the percent by volume of the polycarbonate is 5-15%.
Further, the acrylate monomer is ethyl acrylate (EA), butyl acrylate (BA), Isooctyl acrylate monomer
(2-EHA), vinylacetate (VAc), styrene (St), methyl methacrylate (MMA), methyl acrylate, methacrylic acid
Ethyl ester, butyl methacrylate, isooctyl methacrylate, methylene diacetate vinyl acetate, Methacrylamide, in methyl styrene
One or more；The bonding monomer is ethyl acrylate (EA), butyl acrylate (BA), Isooctyl acrylate monomer (2-EHA)
One or more of；The cross-linking monomer is methacrylic acid, acrylic acid, hydroxy-ethyl acrylate, acrylonitrile, acrylic acid hydroxypropyl
Ester, hydroxyethyl methacrylate, hydroxy propyl methacrylate, glycidyl methacrylate, maleic anhydride, N- methylol third
One or more of acrylamide, methacrylic acid trimethylamine ethyl ester；The emulsifier is anionic emulsifier, cationic
One or more of emulsifier, amphoteric emulsifier and nonionic emulsifier；The initiator is lauroyl peroxide, mistake
Two diisopropyl carbonates, dicetyl peroxydicarbonate two (2- ethylhexyl) ester, tert-Butyl peroxypivalate, peroxidating 3,3 are aoxidized,
5- trimethyl acetyl, α, one of the azo-compounds such as α '-azodiisobutyronitrile, ammonium persulfate and potassium peroxydisulfate or several
Kind；The buffer is sodium bicarbonate.
Further, the emulsifier is lauryl sodium sulfate, OP-10 (polyoxethylene octylphenyl phenol ether -10), 12
Sodium alkyl sulfonate, neopelex, dioctyl sodium sulfosuccinate, n nonylphenol polyethylene glycol oxide (n=4-40) ether,
One or more of polyethylene glycol oxide monolaurate.
A kind of lithium ion battery containing the negative electrode binder includes described in the cathode of the lithium ion battery
Negative electrode binder.
Beneficial effects of the present invention: use polycarbonate modified polyacrylate of the present invention as lithium ion battery
Negative electrode binder, since polycarbonate structure is similar with existing carbonates electrolyte solvent system structure, to electrolyte parent
It is more preferable with property, it is able to ascend the complexing to lithium ion and the complexing effect of the solution under electric field action, ionic conductivity is substantially improved,
The electrochemical impedance and DC impedance for reducing battery greatly improve the charging and discharging capabilities of battery at low temperature；Meanwhile relatively
Acrylate adhesives, the stability of polycarbonate modified acrylate adhesives at high temperature is more preferable, is not easy and electrolyte
Side reaction occurs and produces gas, improves the high-temperature storage performance of battery.No matter being single use or being used in mixed way with SBR, energy
The cryogenic property of battery core is enough substantially improved；Acrylate adhesives are compared simultaneously, using of the present invention polycarbonate modified
Acrylate adhesives battery high-temperature storage performance and cyclical stability it is obviously more preferable.
Specific embodiment
Below with reference to embodiment, further description of the technical solution of the present invention, and however, it is not limited to this, all right
Technical solution of the present invention is modified or equivalent replacement, without departing from the spirit of the technical scheme of the invention range, should all cover
Among protection scope of the present invention.
Specific embodiment one
A kind of negative electrode binder, the negative electrode binder are polycarbonate modified acrylate, and the polycarbonate changes
Property acrylate include polycarbonate and polyacrylate, the percent by volume of the polycarbonate is 5-15%.
Further, the structural formula of the polycarbonate such as (I) formula:
Wherein: R be benzyl, phenethyl, phenylpropyl, to the one or two of the first and second base of benzene.
A kind of preparation method of the negative electrode binder, which is characterized in that specifically includes the following steps:
Step 1: emulsifier and initiator are added in deionized water, and after stirring to all dissolutions, acrylate list is added
Body bonds monomer and cross-linking monomer, obtains the pre-emulsion of monomer after stirring and emulsifying；
Step 2: being added emulsifier, buffer and deionized water in a kettle, and stirring to all dissolutions is placed in 50 DEG C
In water-bath；The pre-emulsion of initiator solution and the monomer is added dropwise in reaction kettle, for warming-in-water to 85 DEG C, polymerization is anti-
After answering 2h, it is down to room temperature, obtains polyacrylate dispersion after being 7-9 with ammonium hydroxide tune pH value；
Step 3: polycarbonate being added into polyacrylate dispersion, continues stirring 2h and is allowed to be thoroughly mixed to obtain poly- carbon
The modified polyacrylate of acid esters, wherein the percent by volume of the polycarbonate is 5-15%.
Wherein the preparation of polyacrylate dispersion belongs to the prior art in the pre-emulsification and step 2 of monomer in step 1,
I.e. the pre-emulsification method of monomer and the preparation method of polyacrylate dispersion are suitable for the present invention in the prior art.
Further, the acrylate monomer is ethyl acrylate (EA), butyl acrylate (BA), Isooctyl acrylate monomer
(2-EHA), vinylacetate (VAc), acrylamide, styrene (St), methyl methacrylate (MMA), methyl acrylate, first
Base ethyl acrylate, butyl methacrylate, isooctyl methacrylate, methylene diacetate vinyl acetate, Methacrylamide, methyl
One or more of styrene；The bonding monomer is ethyl acrylate (EA), butyl acrylate (BA), Isooctyl acrylate monomer
One or more of (2-EHA)；The cross-linking monomer is methacrylic acid, acrylic acid, hydroxy-ethyl acrylate, acrylonitrile, third
Olefin(e) acid hydroxypropyl acrylate, hydroxyethyl methacrylate, hydroxy propyl methacrylate, glycidyl methacrylate, maleic anhydride, N-
One or more of hydroxymethyl acrylamide, methacrylic acid trimethylamine ethyl ester；The emulsifier be anionic emulsifier,
One or more of cationic emulsifier, amphoteric emulsifier and nonionic emulsifier；The initiator is peroxidating
Lauroyl, di-isopropyl peroxydicarbonate, dicetyl peroxydicarbonate two (2- ethylhexyl) ester, tert-Butyl peroxypivalate,
Peroxidating 3,3,5- trimethyl acetyl, α, in the azo-compounds such as α '-azodiisobutyronitrile, ammonium persulfate and potassium peroxydisulfate
It is one or more of；The buffer is sodium bicarbonate.
Further, the emulsifier is lauryl sodium sulfate, OP-10 (polyoxethylene octylphenyl phenol ether -10), 12
Sodium alkyl sulfonate, neopelex, dioctyl sodium sulfosuccinate, n nonylphenol polyethylene glycol oxide (n=4-40) ether,
One or more of polyethylene glycol oxide monolaurate；
A kind of lithium ion battery containing the negative electrode binder includes the cathode in the cathode of the lithium ion battery
Binder.
Embodiment 1
A kind of preparation method of negative electrode binder, includes the following steps:
Step 1: 1.9g OP-10,7.2g dodecane monomer pre-emulsification: are sequentially added in three-necked flask (pre-emulsification kettle)
Then base sodium sulphate, 2.13g ammonium persulfate are added 300g deionized water, start stirring and be allowed to whole dissolutions；In pre-emulsification kettle according to
Secondary addition 215g methacrylic acid, 215g butyl acrylate, 215g methyl methacrylate, stirring and emulsifying 15min obtain monomer
Pre-emulsion；(pre-emulsion is transferred in the heavy liquid funnel of constant pressure)
Step 2: it prepares polyacrylate dispersion: sequentially adding 3.2g in the polymeric kettle equipped with stirring, reflux condensing tube
Lauryl sodium sulfate and 3.5g OP-10,2g sodium bicarbonate and 50g deionized water, start stirring be allowed to dissolution be placed in 50 DEG C
In water-bath；1.07g ammonium persulfate is dissolved in 50g water and obtains ammonium persulfate aqueous solution, ammonium persulfate aqueous solution is packed into constant pressure
In dropping funel；It weighs the monomer pre-emulsion 50g made in step 1 to be added in polymeric kettle, instills the water-soluble of ammonium persulfate
Liquid adds in 15min, and water-bath rises heat to 85 DEG C, keeps the temperature 2h；It is down to room temperature, obtains polyacrylate cream with ammonium hydroxide tune pH value for 9
Liquid；
Step 3: polycarbonate modified: 21.5g polycarbonate emulsion being added in Xiang Shangshu polyacrylate dispersion, continues
Stirring 2h is allowed to be thoroughly mixed, and then discharges, is spare, and being denoted as b1.
Battery assembly: using b1 as negative electrode tab binder, using row mode known in the industry be assembled into polymer lithium from
Sub- battery, and it is denoted as C1.
Embodiment 2:
A kind of preparation method of negative electrode binder, includes the following steps:
Step 1: 1.9g OP-10,7.2g dodecane monomer pre-emulsification: are sequentially added in three-necked flask (pre-emulsification kettle)
Then base sodium sulphate, 2.13g ammonium persulfate are added 300g deionized water, start stirring and be allowed to whole dissolutions；In pre-emulsification kettle
215g methacrylic acid, 215g butyl acrylate, 202.1g methyl methacrylate and 12.9g acrylonitrile are sequentially added, is stirred
Emulsification 15min obtains the pre-emulsion of monomer；(pre-emulsion is transferred in the heavy liquid funnel of constant pressure)
Step 2: it prepares polyacrylate dispersion: sequentially adding 3.2g in the polymeric kettle equipped with stirring, reflux condensing tube
Lauryl sodium sulfate and 3.5g OP-10,2g sodium bicarbonate and 50g deionized water, start stirring be allowed to dissolution be placed in 50 DEG C
In water-bath；1.07g ammonium persulfate is dissolved in 50g water and obtains ammonium persulfate aqueous solution, ammonium persulfate aqueous solution is packed into constant pressure
In dropping funel；It weighs the monomer pre-emulsion 50g made in step 1 to be added in polymeric kettle, it is water-soluble to instill ammonium persulfate
Liquid adds in 15min, and water-bath rises heat to 85 DEG C, keeps the temperature 2h；It is down to room temperature, obtains polyacrylate cream with ammonium hydroxide tune pH value for 9
Liquid；
Step 3: polycarbonate modified: 21.5g polycarbonate emulsion being added in Xiang Shangshu polyacrylate dispersion, continues
Stirring 2h is allowed to be thoroughly mixed, and then discharges, is spare, and being denoted as b2.
Battery assembly: using b2 as negative electrode tab binder, using row mode known in the industry be assembled into polymer lithium from
Sub- battery, and it is denoted as C2.
Embodiment 3:
A kind of preparation method of negative electrode binder, includes the following steps:
Step 1: 1.9g OP-10,7.2g dodecane monomer pre-emulsification: are sequentially added in three-necked flask (pre-emulsification kettle)
Then base sodium sulphate, 2.13g ammonium persulfate are added 300g deionized water, start stirring and be allowed to whole dissolutions；In pre-emulsification kettle
190g methacrylic acid, 215g butyl acrylate, 227.1g methyl methacrylate and 12.9g acrylonitrile are sequentially added, is stirred
Emulsification 15min obtains the pre-emulsion of monomer；(pre-emulsion is transferred in the heavy liquid funnel of constant pressure)
Step 2: it prepares polyacrylate dispersion: sequentially adding 3.2g in the polymeric kettle equipped with stirring, reflux condensing tube
Lauryl sodium sulfate and 3.5g OP-10,2g sodium bicarbonate and 50g deionized water, start stirring be allowed to dissolution be placed in 50 DEG C
In water-bath, 1.07g ammonium persulfate is dissolved in 50g water and obtains ammonium persulfate aqueous solution, ammonium persulfate aqueous solution is packed into constant pressure
In dropping funel；It weighs the monomer pre-emulsion 50g made in step 1 to be added in polymeric kettle, it is water-soluble to instill ammonium persulfate
Liquid adds in 15min, and water-bath rises heat to 85 DEG C, keeps the temperature 2h；It is down to room temperature, obtains polyacrylate cream with ammonium hydroxide tune pH value for 9
Liquid；
Step 3: polycarbonate modified: 21.5g polycarbonate emulsion being added in Xiang Shangshu polyacrylate dispersion, continues
Stirring 2h is allowed to be thoroughly mixed, and then discharges, is spare, and being denoted as b3.
Battery assembly: using b3 as negative electrode tab binder, using row mode known in the industry be assembled into polymer lithium from
Sub- battery, and it is denoted as C3.
Embodiment 4:
Step 1: 1.9g OP-10,7.2g dodecane monomer pre-emulsification: are sequentially added in three-necked flask (pre-emulsification kettle)
Base sodium sulphate；Then 2.13g ammonium persulfate is added 300g deionized water, starts stirring and be allowed to whole dissolutions；In pre-emulsification kettle
Sequentially add 215g methacrylic acid, 215g butyl acrylate, 151g methyl methacrylate and 64g styrene, stirring and emulsifying
15min obtains the pre-emulsion of monomer；(pre-emulsion is transferred in the heavy liquid funnel of constant pressure)
Step 2: it prepares polyacrylate dispersion: sequentially adding 3.2g in the polymeric kettle equipped with stirring, reflux condensing tube
Lauryl sodium sulfate and 3.5g OP-10,2g sodium bicarbonate and 50g deionized water, start stirring be allowed to dissolution be placed in 50 DEG C
In water-bath, 1.07g ammonium persulfate is dissolved in 50g water and obtains ammonium persulfate aqueous solution, ammonium persulfate aqueous solution is packed into constant pressure
In dropping funel；It weighs the monomer pre-emulsion 50g made in step 1 to be added in polymeric kettle, it is water-soluble to instill ammonium persulfate
Liquid adds in 15min, and water-bath rises heat to 85 DEG C, keeps the temperature 2h；It is down to room temperature, obtains polyacrylate cream with ammonium hydroxide tune pH value for 9
Liquid；
Step 3: polycarbonate modified: 21.5g polycarbonate emulsion being added in Xiang Shangshu polyacrylate dispersion, continues
Stirring 2h is allowed to be thoroughly mixed, and then discharges, is spare, and being denoted as b4.
Battery assembly: using b4 as negative electrode tab binder, using row mode known in the industry be assembled into polymer lithium from
Sub- battery, and it is denoted as C4.
Embodiment 5
Step 1: 1.9g OP-10,7.2g dodecane monomer pre-emulsification: are sequentially added in three-necked flask (pre-emulsification kettle)
Base sodium sulphate；Then 2.13g ammonium persulfate is added 300g deionized water, starts stirring and be allowed to whole dissolutions；In pre-emulsification kettle
Sequentially add 215g Isooctyl acrylate monomer, 215g butyl acrylate, 151g methyl methacrylate and 64g styrene, stirring cream
Change 15min and obtains the pre-emulsion of monomer；(pre-emulsion is transferred in the heavy liquid funnel of constant pressure)
Step 2: it prepares polyacrylate dispersion: sequentially adding 3.2g in the polymeric kettle equipped with stirring, reflux condensing tube
Lauryl sodium sulfate and 3.5g OP-10,2g sodium bicarbonate and 50g deionized water, start stirring be allowed to dissolution be placed in 50 DEG C
In water-bath, 1.07g ammonium persulfate is dissolved in 50g water and obtains ammonium persulfate aqueous solution, ammonium persulfate aqueous solution is packed into constant pressure
In dropping funel；It weighs the monomer pre-emulsion 50g made in step 1 to be added in polymeric kettle, it is water-soluble to instill ammonium persulfate
Liquid adds in 15min, and water-bath rises heat to 85 DEG C, keeps the temperature 2h；It is down to room temperature, obtains polyacrylate cream with ammonium hydroxide tune pH value for 9
Liquid；
Step 3: polycarbonate modified: 21.5g polycarbonate emulsion being added in Xiang Shangshu polyacrylate dispersion, continues
Stirring 2h is allowed to be thoroughly mixed, and then discharges, is spare, and being denoted as b5.
Battery assembly: using b5 as negative electrode tab binder, using row mode known in the industry be assembled into polymer lithium from
Sub- battery, and it is denoted as C5.
Embodiment 6
Step 1: 1.9g OP-10,7.2g dodecane monomer pre-emulsification: are sequentially added in three-necked flask (pre-emulsification kettle)
Then base sodium sulphate and 2.13g ammonium persulfate are added 300g deionized water, start stirring and be allowed to whole dissolutions；In pre-emulsification kettle
Inside sequentially add 100g ethyl acrylate, 115g Isooctyl acrylate monomer, 215g butyl acrylate, 151g methyl methacrylate and
64g styrene, stirring and emulsifying 15min obtain the pre-emulsion of monomer；(pre-emulsion is transferred in the heavy liquid funnel of constant pressure)
Step 2: it prepares polyacrylate dispersion: sequentially adding 3.2g in the polymeric kettle equipped with stirring, reflux condensing tube
Lauryl sodium sulfate and 3.5g OP-10,2g sodium bicarbonate and 50g deionized water, start stirring be allowed to dissolution be placed in 50 DEG C
In water-bath, 1.07g ammonium persulfate is dissolved in 50g water and obtains ammonium persulfate aqueous solution, ammonium persulfate aqueous solution is packed into constant pressure
In dropping funel；It weighs the monomer pre-emulsion 50g made in step 1 to be added in polymeric kettle, it is water-soluble to instill ammonium persulfate
Liquid adds in 15min, and water-bath rises heat to 85 DEG C, keeps the temperature 2h；It is down to room temperature, obtains polyacrylate cream with ammonium hydroxide tune pH value for 9
Liquid；
Step 3: polycarbonate modified: 21.5g polycarbonate emulsion being added in Xiang Shangshu polyacrylate dispersion, continues
Stirring 2h is allowed to be thoroughly mixed, and then discharges, is spare, and being denoted as b6.
Battery assembly: using b6 as negative electrode tab binder, using row mode known in the industry be assembled into polymer lithium from
Sub- battery, and it is denoted as C6.
Embodiment 7
Step 1: 1.9g OP-10,7.2g dodecane monomer pre-emulsification: are sequentially added in three-necked flask (pre-emulsification kettle)
Then base sodium sulphate, 2.13g ammonium persulfate are added 300g deionized water, start stirring and be allowed to whole dissolutions；In pre-emulsification kettle
Sequentially add 100g hydroxyethyl methacrylate, 115g Isooctyl acrylate monomer, 215g butyl acrylate, 151g methyl methacrylate
Ester and 64g styrene, stirring and emulsifying 15min obtain the pre-emulsion of monomer；(pre-emulsion is transferred in the heavy liquid funnel of constant pressure)
Step 2: it prepares polyacrylate dispersion: sequentially adding 3.2g in the polymeric kettle equipped with stirring, reflux condensing tube
Lauryl sodium sulfate and 3.5g OP-10,2g sodium bicarbonate and 50g deionized water, start stirring be allowed to dissolution be placed in 50 DEG C
In water-bath, 1.07g ammonium persulfate is dissolved in 50g water and obtains ammonium persulfate aqueous solution, ammonium persulfate aqueous solution is packed into constant pressure
In dropping funel；It weighs the monomer pre-emulsion 50g made in step 1 to be added in polymeric kettle, it is water-soluble to instill ammonium persulfate
Liquid adds in 15min, and water-bath rises heat to 85 DEG C, keeps the temperature 2h；It is down to room temperature, obtains polyacrylate cream with ammonium hydroxide tune pH value for 9
Liquid；
Step 3: polycarbonate modified: 21.5g polycarbonate emulsion being added in Xiang Shangshu polyacrylate dispersion, continues
Stirring 2h is allowed to be thoroughly mixed, and then discharges, is spare, and being denoted as b7.
Battery assembly: using b7 as negative electrode tab binder, using row mode known in the industry be assembled into polymer lithium from
Sub- battery, and it is denoted as C7.
Embodiment 8
Step 1: sequentially add in the three-necked flask (pre-emulsification kettle) 1.9g OP-10,7.2g lauryl sodium sulfate,
Then 2.13g ammonium persulfate is added 300g deionized water, starts stirring and be allowed to whole dissolutions；It is sequentially added in pre-emulsification kettle
100g maleic anhydride, 115g Isooctyl acrylate monomer, butyl acrylate 215g, methyl methacrylate 151g and 64g styrene, are stirred
It mixes emulsification 15min and obtains the pre-emulsion of monomer；(pre-emulsion is transferred in the heavy liquid funnel of constant pressure)
Step 2: it prepares polyacrylate dispersion: sequentially adding 3.2g in the polymeric kettle equipped with stirring, reflux condensing tube
Lauryl sodium sulfate and 3.5g OP-10,2g sodium bicarbonate and 50g deionized water, start stirring be allowed to dissolution be placed in 50 DEG C
In water-bath, 1.07g ammonium persulfate is dissolved in 50g water and obtains ammonium persulfate aqueous solution, ammonium persulfate aqueous solution is packed into constant pressure
In dropping funel；It weighs the monomer pre-emulsion 50g made in step 1 to be added in polymeric kettle, it is water-soluble to instill ammonium persulfate
Liquid adds in 15min, and water-bath rises heat to 85 DEG C, keeps the temperature 2h；It is down to room temperature, obtains polyacrylate cream with ammonium hydroxide tune pH value for 9
Liquid；
Step 3: polycarbonate modified: 21.5g polycarbonate emulsion being added in Xiang Shangshu polyacrylate dispersion, continues
Stirring 2h is allowed to be thoroughly mixed, and then discharges, is spare, and being denoted as b8.
Battery assembly: using b8 as negative electrode tab binder, using row mode known in the industry be assembled into polymer lithium from
Sub- battery, and it is denoted as C8.
Comparative example 1
Battery assembly: using SBR as negative electrode tab binder, using row mode known in the industry be assembled into polymer lithium from
Sub- battery, and it is denoted as C9.
Embodiment 1, embodiment 3, embodiment 5 and comparative example 1 are tested for the property, test item include 0 DEG C charging ,-
20 DEG C electric discharge, 60 DEG C store 30 days, circulation conservation rate.
0 DEG C of charging: it by battery standing in 0 DEG C of baking oven, is discharged charge and discharge 10 times with 0.2C charging, 0.5C, full electricity is left office
Negative electrode tab surface state is dissected and observed afterwards.
- 20 DEG C of electric discharges: it by full electric battery standing in -20 DEG C of baking ovens, is discharged with 0.5C, calculates discharge capacity.
60 DEG C store 30 days: by full electric battery standing 30 days in 60 DEG C of baking ovens, calculating cell thickness expansion rate.
It recycles conservation rate: with 1C charge and discharge cycles 300 weeks under room temperature, calculating 300 weeks capacity retention ratios.
Above test result is as follows the table:
The battery of embodiment 1,3,5 shows balanced electrical property it can be seen from the above test result, at low temperature
Capacity play the battery that is substantially better than in the comparative example using conventional binders, while high-temperature behavior is suitable with comparative example.It is poly-
Binder system after carbonate-modified greatly improves electricity in the case where remaining the dynamic (dynamical) situation of the excellent low temperature of acrylate
The high-temperature storage performance in pond.
Claims (6)
1. a kind of negative electrode binder, it is characterised in that: the negative electrode binder is polycarbonate modified acrylate, described poly-
Carbonate-modified acrylate includes polycarbonate and polyacrylate, and the percent by volume of the polycarbonate is 5-
15%.
2. a kind of negative electrode binder according to claim 1, it is characterised in that: the structural formula of the polycarbonate such as (I)
Formula:
Wherein: R be benzyl, phenethyl, phenylpropyl, to the one or two of the first and second base of benzene.
3. a kind of preparation method of negative electrode binder of any of claims 1 or 2, which is characterized in that specifically includes the following steps:
Step 1: emulsifier and initiator are added in deionized water, after stirring to all dissolutions, addition acrylate monomer,
Monomer and cross-linking monomer are bonded, obtains the pre-emulsion of monomer after stirring and emulsifying；
Step 2: being added emulsifier, buffer and deionized water in a kettle, and stirring to all dissolutions is placed in 50 DEG C of water-baths
In；The pre-emulsion of initiator solution and the monomer is added dropwise in reaction kettle, warming-in-water is to 85 DEG C, polymerization reaction 2h
Afterwards, it is down to room temperature, obtains polyacrylate dispersion after being 7-9 with ammonium hydroxide tune pH value；
Step 3: polycarbonate being added into polyacrylate dispersion, continues stirring 2h and is allowed to be thoroughly mixed to obtain polycarbonate
Modified polyacrylate, wherein the percent by volume of the polycarbonate is 5-15%.
4. a kind of preparation method of negative electrode binder according to claim 3, it is characterised in that: the acrylate monomer
For ethyl acrylate (EA), butyl acrylate (BA), Isooctyl acrylate monomer (2-EHA), vinylacetate (VAc), styrene
(St), methyl methacrylate (MMA), methyl acrylate, ethyl methacrylate, butyl methacrylate, methacrylic acid
One or more of different monooctyl ester, methylene diacetate vinyl acetate, Methacrylamide, methyl styrene；The bonding monomer is third
One or more of olefin(e) acid ethyl ester (EA), butyl acrylate (BA), Isooctyl acrylate monomer (2-EHA)；The cross-linking monomer is
Methacrylic acid, acrylic acid, hydroxy-ethyl acrylate, acrylonitrile, hydroxypropyl acrylate, hydroxyethyl methacrylate, metering system
Sour hydroxypropyl acrylate, glycidyl methacrylate, maleic anhydride, N hydroxymethyl acrylamide, methacrylic acid trimethylamine ethyl ester
One or more of；The emulsifier is anionic emulsifier, cationic emulsifier, amphoteric emulsifier and nonionic
One or more of type emulsifier；The initiator is lauroyl peroxide, di-isopropyl peroxydicarbonate, peroxidating two
Carbonic acid two (2- ethylhexyl) ester, tert-Butyl peroxypivalate, peroxidating 3,3,5- trimethyl acetyl, α, α '-azo two are different
One or more of the azo-compounds such as butyronitrile, ammonium persulfate and potassium peroxydisulfate；The buffer is sodium bicarbonate.
5. a kind of preparation method of negative electrode binder according to claim 3, it is characterised in that: the emulsifier is 12
Sodium alkyl sulfate, OP-10 (polyoxethylene octylphenyl phenol ether -10), dodecyl sodium sulfate, neopelex, amber
One of sodium dioctyl sulfo, n nonylphenol polyethylene glycol oxide (n=4-40) ether, polyethylene glycol oxide monolaurate are several
Kind.
6. a kind of lithium ion battery containing negative electrode binder of any of claims 1 or 2, it is characterised in that: the lithium ion
It include the negative electrode binder in the cathode of battery.
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| CN113937287A (en) * | 2020-06-29 | 2022-01-14 | 珠海冠宇电池股份有限公司 | Negative pole piece and secondary battery containing same |
| CN113937288A (en) * | 2020-06-29 | 2022-01-14 | 珠海冠宇电池股份有限公司 | Positive pole piece and secondary battery containing same |
| CN113937287B (en) * | 2020-06-29 | 2023-04-18 | 珠海冠宇电池股份有限公司 | Negative pole piece and secondary battery containing same |
| CN113937288B (en) * | 2020-06-29 | 2023-04-18 | 珠海冠宇电池股份有限公司 | Positive pole piece and secondary battery containing same |
| CN116995238A (en) * | 2023-08-07 | 2023-11-03 | 宇锵新材料(湖北)有限公司 | Conductive coating for lithium ion battery and preparation method thereof |
| CN116995238B (en) * | 2023-08-07 | 2024-04-16 | 宇锵新材料(湖北)有限公司 | Conductive coating for lithium ion battery and preparation method thereof |
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