CN101179122B - Polymer power cell anode-cathode film - Google Patents
Polymer power cell anode-cathode film Download PDFInfo
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- CN101179122B CN101179122B CN200710157052XA CN200710157052A CN101179122B CN 101179122 B CN101179122 B CN 101179122B CN 200710157052X A CN200710157052X A CN 200710157052XA CN 200710157052 A CN200710157052 A CN 200710157052A CN 101179122 B CN101179122 B CN 101179122B
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Abstract
The invention relates to a polymer battery yin-yang film. The polymer battery yin-yang film uses active substance and adds conductive agent, pore-forming agent, solvent and adhesive into the substanceto make slurry, then covers polyester film with slurry. The invention is characterized in that the adhesive is made from the mixture of polyvinylidene fluorine and hexafluoropropene with two different molecules. The invention takes two PVDF mixtures with different properties as the adhesive during membrane performance and controls slurry viscosity within certain section, thereby improving the problem slurry liquidity during membrane performance. When adopts direct membrane covering method, the process is simple, thickness deviation of yin-yang film is small, the production yield is high, thecost is low and makes it possible for large-scale commercialization of lithium ion battery.
Description
Technical field:
The present invention relates to a kind of polymer power cell anode-cathode film.
Technical background:
The whole world face day by day serious environmental problem and following oil equal energy source will exhausted situation under, seeking regenerative resource can become human urgent task.Lithium ion battery is as the green high-capacity battery of a new generation, have numerous advantages such as high voltage, high-energy-density, memory-less effect, pollution-free, light weight, be widely used in industries such as mobile communication, notebook computer, UPS, electric bicycle, electric automobile, be considered to be in 21st century national economy and the significant new high-tech product of people's lives.
And party thing lithium ion battery is because its excellent security energy, and high-energy-density gains great popularity.At present, the complicated process of preparation of polymer Li-ion battery anode and cathode film, and the film thickness deviation is big, and slurry is difficult for getting in the film-forming process, and rate of finished products is low, and waste of raw materials is bigger, system film cost height; The thickness deviation of film is big, influences the homogeneous performance of battery, has suppressed the business-like large-scale application of polymer Li-ion battery.
Summary of the invention:
The present invention has mainly solved the big problem of power cell anode-cathode film thickness deviation of present making, and the anode and cathode film of the polyvinylidene fluoride-hexafluoropropylene of two kinds of different moleculars of a kind of employing as binding agent is provided, and has reduced the thickness difference of film.
The present invention has solved also that slurry is difficult for getting in the film-forming process, rate of finished products is low, waste of raw materials is bigger, the high problem of system film cost, the anode and cathode film of the polyvinylidene fluoride-hexafluoropropylene of two kinds of different molecular weights of a kind of employing as binding agent is provided, and the control slurry viscosity has effectively improved the flowability problem in the film-forming process in a certain interval, improve rate of finished products, reduced cost.
Another goal of the invention of the present invention has solved the problem of traditional anode and cathode film preparation complex process, polyvinylidene fluoride-the hexafluoropropylene that adopts two kinds of different molecular weights is as binding agent, can be directly with coating legal system film, technological operation is convenient, and the anode and cathode film thickness deviation of making is little, the rate of finished products height.
The technical solution adopted for the present invention to solve the technical problems is: a kind of polymer power cell anode-cathode film, it is to adopt active material, add conductive agent, pore creating material, after solvent and binding agent are made slurry, be coated on the polyester film and make, it is characterized in that: binding agent is that the polyvinylidene fluoride-hexafluoropropylene of two kinds of different molecular weights mixes, polyvinylidene fluoride-the hexafluoropropylene of two kinds of different molecular weights is P (VDF-HFP)-A and P (VDF-HFP)-B, wherein the mean molecule quantity of P (VDF-HFP)-A is 700,000, and the mean molecule quantity of P (VDF-HFP)-B is 300,000.
As a kind of preferred version of such scheme, described P (VDF-HFP)-A proportion is 10%～90%, and P (VDF-HFP)-B proportion is 10%～90%.
As a kind of preferred version of such scheme, wherein the cathodic coating component is:
Active material: for one or more lithium oxides must make up, as lithium and cobalt oxides, lithium nickel oxide.Lithium-cobalt-nickel oxide, lithium manganese oxide, lithium iron phosphate oxide or their mixture, 60%～85%,
Conductive agent: be various conductive carbon blacks, as acetylene black or Super P, 1%～10%
Binding agent: be P (VDF-HFP), 2%～15%
Pore creating material: be dibutyl phthalate (DBP), ethyl carbonate etc., 8%～15%
As a kind of preferred version of such scheme, wherein the anode film component is:
Active material: be the combination of one or more carbonaceous materials, as natural or synthetic graphite, pitch coke or active carbon or their mixture, 60%～85%
Conductive agent: be various conductive carbon blacks, as acetylene black or Super P, 1%～10%
Binding agent: be P (VDF-HFP), 2%～15%
Pore creating material: be dibutyl phthalate (DBP), ethyl carbonate etc., 8%～15%
The present invention uses the PVDF of two kinds of different qualities to mix as the binding agent in the film-forming process, and the control slurry viscosity has effectively improved the flowability problem of slurry in the film-forming process in a certain interval; Adopt directly coating legal system film, technological operation is convenient, and the anode and cathode film thickness deviation of making is little, the rate of finished products height, and cost is low, the lithium ion battery large-scale commercial applications is changed into be possible.
Embodiment:
Embodiment 1:
The galvanic anode film
Native graphite 2250g
Super?P 60g
Dibutyl phthalate (DBP) 240g
Vinylidene fluoride-hexafluoropropylene-A 45g
Vinylidene fluoride-hexafluoropropylene-B 405g
Acetone 3900g
Production technology of the present invention is: with required anode material, conductive agent, binding agent adds in the mixer, fully mix, add solvent again, stir, make anode slurry, then the anode slurry of making is coated with on the polyester film with coating machine again,, promptly makes anode film 20 ℃～80 ℃ oven dry.
The cell cathode film
LiMn2O4 2250g
Super?P 150g
Dibutyl phthalate (DBP) 450g
Vinylidene fluoride-hexafluoropropylene-A 15g
Vinylidene fluoride-hexafluoropropylene-B 145g
Acetone 2200g
Production technology of the present invention is: with required cathode material, conductive agent, binding agent adds in the mixer, fully mix, add solvent again, stir, make cathode slurry, then the cathode slurry of making is coated with on the polyester film with coating machine again,, promptly makes cathodic coating 20 ℃～80 ℃ oven dry.
Embodiment 2:
The galvanic anode film
Native graphite 2400g
Super?P 30g
Dibutyl phthalate (DBP) 240g
Vinylidene fluoride-hexafluoropropylene-A 297g
Vinylidene fluoride-hexafluoropropylene-B 33g
Acetone 3200g
Production technology of the present invention is: with required anode material, conductive agent, binding agent adds in the mixer, fully mix, add solvent again, stir, make anode slurry, then the anode slurry of making is coated with on the polyester film with coating machine again,, promptly makes anode film 20 ℃～80 ℃ oven dry.
The cell cathode film
LiMn2O4 2400g
Super?P 120g
Dibutyl phthalate (DBP) 240g
Vinylidene fluoride-hexafluoropropylene-A 216g
Vinylidene fluoride-hexafluoropropylene-B 24g
Acetone 2700g
Production technology of the present invention is: with required cathode material, conductive agent, binding agent adds in the mixer, fully mix, add solvent again, stir, make cathode slurry, then the cathode slurry of making is coated with on the polyester film with coating machine again,, promptly makes cathodic coating 20 ℃～80 ℃ oven dry.
Claims (4)
1. polymer power cell anode-cathode film, it is to adopt active material, after adding conductive agent, pore creating material, solvent and binding agent are made slurry, be coated on the polyester film and make, it is characterized in that: binding agent is that the polyvinylidene fluoride-hexafluoropropylene of two kinds of different molecular weights mixes, polyvinylidene fluoride-the hexafluoropropylene of two kinds of different molecular weights is P (VDF-HFP)-A and P (VDF-HFP)-B, wherein the mean molecule quantity of P (VDF-HFP)-A is 700,000, and the mean molecule quantity of P (VDF-HFP)-B is 300,000.
2. a kind of polymer power cell anode-cathode film according to claim 1 is characterized in that described P (VDF-HFP)-A proportion is 10%～90%, and P (VDF-HFP)-B proportion is 10%～90%.
3. a kind of polymer power cell anode-cathode film according to claim 1 is characterized in that wherein the cathodic coating component is:
Active material: be lithium and cobalt oxides, lithium nickel oxide, lithium-cobalt-nickel oxide, lithium manganese oxide, lithium iron phosphate oxide or their mixture, 60%～85%,
Conductive agent is acetylene black or Super P, 1%～10%
Binding agent: be P (VDF-HFP), 2%～15%
Pore creating material: be dibutyl phthalate or ethyl carbonate, 8%～15%.
4. a kind of polymer power cell anode-cathode film according to claim 1 is characterized in that wherein the anode film component is:
Active material: be natural or synthetic graphite, pitch coke or active carbon or their mixture, 60%～85%
Conductive agent: be acetylene black or Super P, 1%～10%
Binding agent: be P (VDF-HFP), 2%～15%
Pore creating material: be dibutyl phthalate or ethyl carbonate, 8%～15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710157052XA CN101179122B (en) | 2007-11-21 | 2007-11-21 | Polymer power cell anode-cathode film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710157052XA CN101179122B (en) | 2007-11-21 | 2007-11-21 | Polymer power cell anode-cathode film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101179122A CN101179122A (en) | 2008-05-14 |
| CN101179122B true CN101179122B (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710157052XA Active CN101179122B (en) | 2007-11-21 | 2007-11-21 | Polymer power cell anode-cathode film |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102527257B (en) * | 2011-12-31 | 2013-11-06 | 大连理工大学 | Preparation method of conductive carbon membrane |
| CN102931378B (en) * | 2012-10-09 | 2016-01-20 | 东莞市创明电池技术有限公司 | Lithium ion cell electrode and preparation method thereof, lithium ion battery |
| CN104332323B (en) * | 2014-07-31 | 2018-01-16 | 深圳博磊达新能源科技有限公司 | A kind of porous electrode, preparation method and its application in terms of lithium-ion capacitor, ultracapacitor is prepared |
| JP6311670B2 (en) * | 2015-07-13 | 2018-04-18 | トヨタ自動車株式会社 | Method for producing positive electrode plate for lithium ion secondary battery and positive electrode plate for lithium ion secondary battery |
| CN105870489B (en) * | 2016-06-07 | 2019-03-01 | 程建聪 | Monomer-polymer lithium ion battery manufacturing method and its assemble method |
| CN105914322B (en) * | 2016-06-07 | 2019-08-16 | 程建聪 | The manufacturing method of monomer high capacity polymer lithium ion battery |
| CN105958012A (en) * | 2016-06-07 | 2016-09-21 | 程建聪 | Single high-capacity polymer lithium ion battery negative plate and manufacturing method therefor |
| CN108123155A (en) * | 2016-11-28 | 2018-06-05 | 中国科学院金属研究所 | A kind of preparation method of non-fluorine porous composite film used for all-vanadium redox flow battery |
| CN106784670A (en) * | 2016-12-15 | 2017-05-31 | 衡阳市鑫晟新能源有限公司 | A kind of preparation method of lithium ion battery negative material |
| CN110350196B (en) * | 2019-06-27 | 2022-07-05 | 东华大学 | Composite binder, silicon-based negative plate and preparation method thereof |
| WO2023023945A1 (en) * | 2021-08-24 | 2023-03-02 | 株式会社吴羽 | Adhesive composition, electrode mixture, electrode, and non-aqueous electrolyte secondary battery |
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2007
- 2007-11-21 CN CN200710157052XA patent/CN101179122B/en active Active
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| CN101179122A (en) | 2008-05-14 |
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Effective date of registration: 20211110 Address after: 311215 No. 855, Jianshe Second Road, economic and Technological Development Zone, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Wanxiang 123 Co., Ltd Address before: 311215 Wanxiang Group Technology Center, ningwei Town, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee before: Wanxiang Group Co., Ltd Patentee before: Wanxiang Electric Vehicle Co., Ltd |