CN1165090C - Lithium ion polymer cell - Google Patents
Lithium ion polymer cell Download PDFInfo
- Publication number
- CN1165090C CN1165090C CNB011244410A CN01124441A CN1165090C CN 1165090 C CN1165090 C CN 1165090C CN B011244410 A CNB011244410 A CN B011244410A CN 01124441 A CN01124441 A CN 01124441A CN 1165090 C CN1165090 C CN 1165090C
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- China
- Prior art keywords
- lithium ion
- barrier film
- film
- positive plate
- adhesive
- Prior art date
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Links
- 229920000642 polymer Polymers 0.000 title claims abstract description 35
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 29
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000000853 adhesive Substances 0.000 claims abstract description 53
- -1 polypropylene Polymers 0.000 claims abstract description 27
- 239000004698 Polyethylene Substances 0.000 claims abstract description 18
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 229920000573 polyethylene Polymers 0.000 claims abstract description 18
- 239000004743 Polypropylene Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 229920001155 polypropylene Polymers 0.000 claims abstract description 10
- 230000001070 adhesive effect Effects 0.000 claims description 52
- 239000010408 film Substances 0.000 claims description 44
- 230000004888 barrier function Effects 0.000 claims description 33
- 229920000058 polyacrylate Polymers 0.000 claims description 25
- 239000005030 aluminium foil Substances 0.000 claims description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 238000003475 lamination Methods 0.000 claims description 11
- 239000006183 anode active material Substances 0.000 claims description 7
- 239000011889 copper foil Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 229920000131 polyvinylidene Polymers 0.000 claims description 6
- 239000010416 ion conductor Substances 0.000 claims description 4
- 229920000233 poly(alkylene oxides) Polymers 0.000 claims description 4
- 229920006254 polymer film Polymers 0.000 claims description 4
- 239000010409 thin film Substances 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000012982 microporous membrane Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 8
- 150000002148 esters Chemical class 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002033 PVDF binder Substances 0.000 abstract 1
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 abstract 1
- 229910052744 lithium Inorganic materials 0.000 description 13
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 12
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical class CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 11
- 239000003792 electrolyte Substances 0.000 description 10
- 239000000843 powder Substances 0.000 description 10
- 239000002002 slurry Substances 0.000 description 10
- 229910001220 stainless steel Inorganic materials 0.000 description 9
- 239000010935 stainless steel Substances 0.000 description 9
- 235000019241 carbon black Nutrition 0.000 description 8
- 239000006229 carbon black Substances 0.000 description 8
- 235000013495 cobalt Nutrition 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 239000010941 cobalt Substances 0.000 description 7
- 229910017052 cobalt Inorganic materials 0.000 description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 7
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 7
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000004411 aluminium Substances 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 3
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical group O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 239000012528 membrane Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920006255 plastic film Polymers 0.000 description 3
- 239000002985 plastic film Substances 0.000 description 3
- 229940068921 polyethylenes Drugs 0.000 description 3
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000006182 cathode active material Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N ferric oxide Chemical compound O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 1
- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical group CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910014778 LiMn2O 4 Inorganic materials 0.000 description 1
- 229910013716 LiNi Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- 229910013872 LiPF Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910012513 LiSbF 6 Inorganic materials 0.000 description 1
- 101150058243 Lipf gene Proteins 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- SIXOAUAWLZKQKX-UHFFFAOYSA-N carbonic acid;prop-1-ene Chemical compound CC=C.OC(O)=O SIXOAUAWLZKQKX-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 229910021385 hard carbon Inorganic materials 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N itaconic acid Chemical class OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 239000002931 mesocarbon microbead Substances 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to a lithium ion polymer battery which comprises a positive plate, a negative plate and an isolating film, wherein the positive plate and the negative plate adopt foil-shaped current collectors. An adhesive agent is any one of polyvinylidene fluoride, modified polypropylene acid ester or polypropylene acid ester, and modified polyethylene or polydiene, or a mixture of any two of the materials in an arbitrary mixing proportion, or a mixture of the materials in an arbitrary mixing proportion. The lithium ion polymer battery has the characteristics of high capacity density, long cyclic life, small internal resistance, wide range of service temperature, favorable high rate discharge capability, low self-discharge property, high safety, simple manufacturing technology, low cost, etc.
Description
Technical field
The present invention relates to a kind of lithium ion polymer battery.
Background technology
Lithium ion polymer battery based on the Bellcore technology of U.S. Pat P5296318, it just, negative plate adopts copper mesh, the aluminium net is as collector body, on the collector body just, the adhesive that anode active material layer adopts is the copolymer of vinylidene (vinylidene fluoride) and hexafluoropropylene (hexafluoropropylene), it is the copolymer of VDF and HFP, such adhesive has preferably self-adhesion and makes a concerted effort, but the bonding force to Copper Foil or aluminium foil is very poor, therefore this lithium polymer battery adopts copper mesh, the aluminium net is as collector body, and adhesive is realized from bonding and clamp copper mesh simultaneously or the aluminium net becomes positive plate by its mesh, negative plate.For reaching adhesive from bonding, require hot-rolling to press or hot pressing on the technology, will add simultaneously can become self-supported membrane after Plasticizer DBP (dibutyl phthalate) class material makes adhesive and positive and negative electrode powder through coating, otherwise is difficult to realize the hot pressing of both positive and negative polarity film and copper mesh/aluminium net and realizes from bonding.This class lithium polymer battery exists following shortcoming: 1. because the anode and cathode active materials layer need be made self-supported membrane, make that positive and negative plate thickness is bigger, the extension performance is bad, and the battery volume is bigger, and capacity density is not high; 2. because the adding of Plasticizer DBP class material makes entire cell need extraction,, therefore there is complex process to remove DBP class plasticizer, the cost height, DBP removes problems such as incomplete; 3. adopt netted collector body, it costs an arm and a leg, and makes the battery cost up.
Summary of the invention
The objective of the invention is to the problems referred to above, the lithium ion polymer battery that a kind of production technology is simple, cost is low is provided at existing lithium ion polymer battery existence.
The object of the present invention is achieved like this: lithium ion polymer battery of the present invention comprises positive plate, negative plate and barrier film, positive plate and negative plate are respectively by just, negative collector body and bonding thereon just, anode active material layer is formed, described positive plate and negative plate adopt paper tinsel shape collector body, just, adhesive in the anode active material layer is one of mixture of forming by following mixed of in following three kinds of adhesives two kinds or three kinds: (a) Kynoar, (b) modified polyacrylate or polyacrylate, (c) modified poly ethylene or polydiene, the adhesive Kynoar mixes with adhesive modified polyacrylate or polyacrylate when using, its ratio of weight and number is 1-6: 0.1-3.5, adhesive modified polyacrylate or polyacrylate mix with adhesive modified poly ethylene or polydiene when using, its ratio of weight and number is 0.1-3.5: 0.1-3.5, the adhesive Kynoar mixes with adhesive modified poly ethylene or polydiene when using, its ratio of weight and number is 1-6: 0.1-3.5, above-mentioned three kinds of adhesives mix when using, and its ratio of weight and number is 1-12: 0.1-3.5: 0.1-3.5.
To coat on the paper tinsel shape collector body after adhesive of the present invention and positive powder or negative pole powder and the solvent, or adhesive is mixed back dry powder pressing or roll-in on paper tinsel shape collector body with positive powder or negative pole powder, thereby make positive plate and negative plate.The general value of the parts by weight of adhesive and positive powder or negative pole powder is: 0.5 part to 13 parts in adhesive, 87 to 99.5 parts in positive powder or negative pole powder if increase the umber of adhesive again, then will influence the performance of battery.The positive and negative plate made from adhesive of the present invention is thin and soft, has good ductility.
Above-mentioned modified polyacrylate is meant: based on acrylic acid and esters of acrylic acid materials such as acrylic acid, methacrylic acid, 2-ethylhexyl acrylate, acrylonitrile, methyl acrylate, methyl methacrylate, ethyl acrylate, butyl acrylate, butyl methacrylate, acrylic acid carboxylic second (third) ester, Isooctyl acrylate monomer, acrylic acid 12 (18) ester, itaconicacids, with weight ratio be that styrene or the butadiene of 0-49% carries out obtaining copolymer after the copolymerization, and the material that obtains after its carboxyl partly or entirely neutralized.Above-mentioned modified poly ethylene is meant: the material that the hydrogen atom on the vinyl polymer chain obtains after partly or entirely being replaced by hydroxyl, ester group or halogen atom.The preferred degree of polymerization of modified polyacrylate class and modified poly ethylene is 20 to 100,000 among the present invention.
When above-mentioned a adhesive----Kynoar uses separately and paper tinsel shape collector body adhesiveness is preferably arranged, but can be subjected to the electrolyte influence, make poor adhesion, thereby influence the cycle characteristics of battery, in addition, because its adhesiveness is 70%RH-99%RH meeting variation under high humidity environment, the minute moisture on collector body surface can influence its adhesiveness.
When above-mentioned b adhesive----modified polyacrylate or polyacrylate use separately paper tinsel shape collector body there is adhesiveness preferably, is difficult to the moisture content removed on a small quantity, influence the cycle characteristics and the internal resistance of battery but can absorb.
Above-mentioned c adhesive----modified poly ethylene or polydiene, using separately has adhesiveness preferably to paper tinsel shape collector body, but its cost is too high, can't be accepted by market.
The a adhesive mixes with the b adhesive when using, and its parts by weight are: 1 to 6 part of a adhesive, 0.1 to 3.5 part of b adhesive.The b adhesive mixes with the c adhesive when using, and its parts by weight are: 0.1 to 3.5 part of b adhesive, 0.1 to 3.5 part of c adhesive.The a adhesive mixes with the c adhesive when using, and its parts by weight are: 1 to 6 part of a adhesive, 0.1 to 3.5 part of c adhesive.
The present invention mixes use with three kinds of adhesives, can overcome above-mentioned deficiency, so the preferred three kinds of adhesives of adhesive of anode and cathode active materials layer are pressed the mixture that column weight amount umber mixes among the present invention: 1 to 6 part of a adhesive, 0.1 to 3.5 part of b adhesive, 0.1 to 3.5 part of c adhesive.The adhesive composition that three kinds of adhesives are mixed has good high temperature performance, its vitrification point Tg is-40 ℃ to 20 ℃, thermal degradation temperature is 300 ℃, to Copper Foil, paper tinsel shape collector bodies such as aluminium foil have very strong bonding force, and this adhesive composition and just, negative plate is low to moisture sensitive, make batch mixing, coating, main technique such as lamination all can be at conventional environments but not are finished under the low wet environment, just made, negative plate is owing to the good bonding of adhesive to paper tinsel shape collector body, can not be subjected to the electrolyte influence and the situation that the both positive and negative polarity active material comes off from collector body takes place, this adhesive composition can absorb certain electrolyte in addition becomes glue and has good lithium ion conductive.
Preferred Copper Foil of collector body of the present invention or aluminium foil.
The lamination of positive plate, negative plate and barrier film is preferably with the direct lamination of repetition alternant of positive plate/barrier film/negative plate/barrier film/positive plate/barrier film/negative plate or directly reels behind the lamination again among the present invention, need not heat lamination, barrier film is discontinuous each other, and perhaps all barrier films are that a continuous integral body is to prevent the short circuit between the positive and negative plate effectively.With behind the simple lamination of positive plate, negative plate and barrier film or after reeling, again that all positive collector bodies or negative collector body are welded together respectively, encapsulate with aluminum plastic film and to inject electrolyte simultaneously, promptly made lithium polymer battery of the present invention.Certainly, positive plate, negative plate and barrier film also can adopt existing technology direct heat to press together, and encapsulate with aluminum plastic film then and inject electrolyte simultaneously, and make lithium polymer battery.
Lithium polymer battery of the present invention can adopt the polymer Li-ion conductor thin film or the microporous polymer film of atresia, the nonporous film that nonporous film, polyacrylate and the coating of polyvinylidene blending thing that the polymer Li-ion conductor thin film of atresia selects for use polyalkylene oxide class nonporous film, polyalkylene oxide class and the coating of polyvinylidene blending thing to form forms, microporous polymer film is selected polypropylene microporous film, three layers of compound microporous membrane of polypropylene, polyethylene/polypropylene for use.
The used positive electrode active material of lithium polymer battery of the present invention is lithium and transition elements composite oxides, as LiCoO
2, LiMn2O
4, LiNiO
2, LiNi
xCo
1-xO
2(X=0-1) etc., used negative electrode active material is a carbon dust, as carbonaceous mesophase spherules (MCMB), native graphite and modifier thereof, oil coke and modifier thereof and hard carbon class material.
The used electrolyte of lithium ion polymer battery of the present invention is: lithium salts can be selected LiPF for use
6, LiASF
6, LiCIO
4, LiN (CF
3SO
2)
2, LiBF
4, LiSbF
6, LiCF
3SO
3Electrolyte solvent is ethylene carbonate (EC), propene carbonate (PC), dimethyl carbonate (DMC), diethyl carbonate (DEC), gamma-butyrolacton (GBL), 1,2-dimethoxy-ethane (DME), 1, the mixture of 3-dioxolanes (DIOX), methyl ethyl carbonate (EMC) and these solvents etc.Electrolytical concentration is 0.1 to 2M.
Technique effect of the present invention is: 1. the present invention need not to add plasticizer aborning and extracts, and production technology is simple, and cost is low; 2. the present invention adopts paper tinsel shape collector body, compares with the battery that adopts the net form collector body, and cost reduces greatly; 3. lithium ion polymer battery of the present invention has the capacity density height, has extended cycle life, characteristics such as internal resistance is little, serviceability temperature haves a wide reach, good high-rate discharge capacity and low self-discharge, the non-ignitable high security that do not explode; 4. because electrode has good ductility, lithium polymer battery of the present invention can be made different shape such as the triangle bodily form, square, cylindrical, conical, prismatic etc., and thickness can be as thin as 0.1 millimeter, and volume can be very big or little.
The invention will be further described below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the lamination end view of positive and negative plate and barrier film in the embodiment of the invention.
Embodiment
Embodiment one to embodiment 11 is the production of positive plate or negative plate.
Embodiment one:
Count by weight, get 2 parts of Kynoar, 2 parts of modification polydiene, 96 parts of carbon dusts, become the slurry of homogeneous after 90 parts of N-methyl pyrrolidones mix with homogenizer in stainless cylinder of steel, be coated on the Copper Foil 100 ℃ to 200 ℃ oven dry down in baking oven, obtain negative plate, and cut into the shape of requirement.
Embodiment two:
Count by weight, get 2 parts of Kynoar, 1 part of polyacrylate, after mixing with homogenizer, 7 parts of conductive carbon blacks, 90 parts of cobalts acid lithiums, 40 parts of N-methyl pyrrolidones obtain the slurry of homogeneous in stainless steel cask, be coated on the aluminium foil, 80 ℃ to 200 ℃ oven dry down obtain positive plate, and cut into the shape of requirement in baking oven.
Embodiment three:
Count by weight, get 1 part of polyacrylate, 1 part of modified poly ethylene, 6 parts of conductive carbon blacks, 92 parts of cobalt acid lithiums, after 35 parts of N-methyl pyrrolidones mix with homogenizer in stainless steel cask, obtain the slurry of homogeneous, be coated on the aluminium foil, 100 ℃ to 210 ℃ oven dry down in baking oven, obtain positive plate, cut into the size of requirement again.
Embodiment four:
Count by weight, get 2.3 parts of Kynoar, 2 parts of modified polyacrylates, 2 parts of modified poly ethylenes, 8.5 parts of conductive carbon blacks, 85.2 part cobalt acid lithium, 39 parts of N-methyl pyrrolidones become the slurry of homogeneous after the high-speed stirred in stainless steel cask, be coated on the aluminium foil 60 ℃ to 240 ℃ oven dry down in baking oven, obtain positive plate, cut into the shape of requirement.
Embodiment five:
Count by weight, get 12 parts of Kynoar, 0.1 part modified polyacrylate, 0.1 part of modified poly ethylene, 8.5 parts of conductive carbon blacks, 79.3 part cobalt acid lithium, 33 parts of N-methyl pyrrolidones become the slurry of homogeneous after the high-speed stirred in stainless steel cask, be coated on the aluminium foil 60 ℃ to 240 ℃ oven dry down in baking oven, obtain positive plate, cut into the shape of requirement.
Embodiment six:
Count by weight, get 1 part of Kynoar, 3.5 part modified polyacrylate, 3.5 parts of modified poly ethylenes, 8.5 parts of conductive carbon blacks, 83.5 part cobalt acid lithium, 28 parts of N-methyl pyrrolidones become the slurry of homogeneous after the high-speed stirred in stainless steel cask, be coated on the aluminium foil 60 ℃ to 240 ℃ oven dry down in baking oven, obtain positive plate, cut into the shape of requirement.
Embodiment seven:
Count by weight, get 6 parts of Kynoar, 3.5 part modified polyacrylate, 3.5 parts of modified poly ethylenes, 6.5 parts of conductive carbon blacks, 80.5 part cobalt acid lithium, 28 parts of N-methyl pyrrolidones become the slurry of homogeneous after the high-speed stirred in stainless steel cask, be coated on the aluminium foil 60 ℃ to 240 ℃ oven dry down in baking oven, obtain positive plate, cut into the shape of requirement.
Embodiment eight:
Meter is got 3.5 parts of modification polydiene, 96.5 parts of carbon dusts by weight, 95 parts of N-methyl pyrrolidones become the homogeneous slurry after the high-speed stirred in stainless steel cask, be coated on the Copper Foil 60 ℃ to 220 ℃ oven dry down in baking oven, obtain negative plate, and be cut into the shape of requirement.
Embodiment nine:
Count by weight, get 4 parts of Kynoar, 9 parts of conductive carbon blacks, 87 parts of cobalt acid lithiums, obtain the slurry of homogeneous after 70 parts of N-methyl pyrrolidones mix with homogenizer in stainless steel cask, be coated on the aluminium foil 60 ℃ to 250 ℃ oven dry down in baking oven, obtain positive plate, and cut into the shape of requirement.
Embodiment ten:
Count by weight, get 0.5 part of modified polyacrylate, 9 parts of conductive carbon blacks, 90.5 part cobalt acid lithium, obtain the slurry of homogeneous after 33 parts of N-methyl pyrrolidones mix with homogenizer in stainless steel cask, be coated on the aluminium foil 60 ℃ to 220 ℃ oven dry down in baking oven, obtain positive plate, and cut into the shape of requirement.
Embodiment 11:
Solvent N-methyl pyrrolidone among the embodiment one to embodiment nine is removed, and after all the other components were mixed, directly roll-in or concora crush can obtain corresponding positive plate and negative plate on Copper Foil or aluminium foil.
Embodiment 12:
Get a kind of negative plate in the foregoing description, get a kind of positive plate in the foregoing description, select for use nonporous film that poly(ethylene oxide) and polyvinylidene blending thing make as barrier film, behind the repetition alternant lamination with positive plate shown in Figure 1 2/ barrier film 1/ negative plate 3/ barrier film 1/ positive plate 2/ barrier film 1/ negative plate 3, the lug that all positive plates 2 are drawn is welded together again, the lug of all negative plates 3 is welded together, again respectively with just, negative flow collection sheet welding is drawn, by aluminum plastic film carry out three limits pre-packaged after, inject electrolyte, encapsulation is on one side last again, changes into, become lithium ion polymer battery of the present invention after the secondary encapsulation.Electrolyte adopts following system: electrolyte adopts LiPF
6, its concentration is 1M, and solvent adopts the mixture of ethylene carbonate, dimethyl carbonate and diethyl carbonate, and their weight ratio is 1: 1: 1.
Embodiment 13:
Barrier film in the nonporous film alternate embodiment 12 that polymethyl methacrylate and polyvinylidene blending thing are made is made lithium ion polymer battery.
Embodiment 14:
Three layers of composite membrane of polypropylene, polyethylene/polypropylene that will contain micropore are made lithium ion polymer battery as the barrier film in the barrier film alternate embodiment 12.
Embodiment 15:
Positive plate among the embodiment 12, negative plate, barrier film are changed into the form that first lamination reels again and made cylinder or other arbitrary shape by stacked, make the lithium ion polymer battery of cylinder or other shape.
Claims (9)
1. lithium ion polymer battery, comprise positive plate, negative plate and barrier film, positive plate and negative plate are respectively by just, negative collector body and bonding thereon just, anode active material layer is formed, it is characterized in that described positive plate and negative plate adopt paper tinsel shape collector body, just, adhesive in the anode active material layer is one of mixture of forming by following mixed of in following three kinds of adhesives two kinds or three kinds: (a) Kynoar, (b) modified polyacrylate or polyacrylate, (c) modified poly ethylene or polydiene, the adhesive Kynoar mixes with adhesive modified polyacrylate or polyacrylate when using, its ratio of weight and number is 1-6: 0.1-3.5, adhesive modified polyacrylate or polyacrylate mix with adhesive modified poly ethylene or polydiene when using, its ratio of weight and number is 0.1-3.5: 0.1-3.5, the adhesive Kynoar mixes with adhesive modified poly ethylene or polydiene when using, its ratio of weight and number is 1-6: 0.1-3.5, above-mentioned three kinds of adhesives mix when using, and its ratio of weight and number is 1-12: 0.1-3.5: 0.1-3.5.
2. lithium ion polymer battery according to claim 1, it is characterized in that: described positive plate, negative plate and barrier film are in the same place with the direct lamination of repetition alternant of positive plate/barrier film/negative plate/barrier film/positive plate/barrier film/negative plate, and the discontinuous or all each other barrier films of barrier film are a continuous integral body.
3. lithium ion polymer battery according to claim 1, it is characterized in that: reel behind described positive plate, negative plate and the barrier film direct lamination of repetition alternant with positive plate/barrier film/negative plate/barrier film/positive plate/barrier film/negative plate, the discontinuous or all each other barrier films of barrier film are a continuous integral body.
4. according to claim 1 or 2 or 3 described lithium ion polymer batteries, it is characterized in that: described paper tinsel shape collector body is Copper Foil or aluminium foil.
5. according to claim 1 or 2 or 3 described lithium ion polymer batteries, it is characterized in that described barrier film adopts the polymer Li-ion conductor thin film of atresia.
6. lithium ion polymer battery according to claim 5 is characterized in that: the nonporous film that nonporous film, polyacrylate and the coating of polyvinylidene blending thing that the polymer Li-ion conductor thin film of described atresia selects for use polyalkylene oxide class nonporous film, polyalkylene oxide class and the coating of polyvinylidene blending thing to form forms.
7. according to claim 1 or 2 or 3 described lithium ion polymer batteries, it is characterized in that: described barrier film adopts microporous polymer film.
8. lithium ion polymer battery according to claim 7 is characterized in that: described microporous polymer film is selected polypropylene microporous film, three layers of compound microporous membrane of polypropylene, polyethylene/polypropylene for use.
9. according to claim 1 or 2 or 3 described lithium ion polymer batteries, it is characterized in that: its profile is square, the triangle bodily form, cylindrical, conical, prismatic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011244410A CN1165090C (en) | 2001-07-28 | 2001-07-28 | Lithium ion polymer cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB011244410A CN1165090C (en) | 2001-07-28 | 2001-07-28 | Lithium ion polymer cell |
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| CN1165090C true CN1165090C (en) | 2004-09-01 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1321477C (en) * | 2003-10-28 | 2007-06-13 | 比亚迪股份有限公司 | Lithium ion secondary cell |
| CN1953252B (en) * | 2005-10-19 | 2010-11-10 | 比亚迪股份有限公司 | Cell cathode and lithium ion cell using the same and their manufacture methods |
| WO2009014399A2 (en) | 2007-07-26 | 2009-01-29 | Lg Chem, Ltd. | Electrode active material having core-shell structure |
| JP5079461B2 (en) * | 2007-11-14 | 2012-11-21 | ソニー株式会社 | Positive electrode for lithium ion secondary battery, method for producing the same, and lithium ion secondary battery |
| KR101299285B1 (en) * | 2010-09-24 | 2013-08-23 | 제이에스알 가부시끼가이샤 | Binder composition for electrode |
| CN105679984A (en) * | 2016-03-29 | 2016-06-15 | 浙江地坤键新能源科技有限公司 | Non-porous separator and application thereof |
| CN105810948B (en) * | 2016-05-26 | 2018-08-10 | 江苏深苏电子科技有限公司 | A kind of lithium ion battery adhesive and preparation method thereof |
| CN106784638A (en) * | 2016-12-15 | 2017-05-31 | 衡阳市鑫晟新能源有限公司 | A kind of lithium ion cell positive filming method |
| CN110676447B (en) * | 2019-09-29 | 2021-06-01 | 中国科学院化学研究所 | High-voltage workable composite anode and preparation method thereof |
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