CN114068855A - Lithium ion battery positive pole piece and preparation method thereof - Google Patents
Lithium ion battery positive pole piece and preparation method thereof Download PDFInfo
- Publication number
- CN114068855A CN114068855A CN202010764897.0A CN202010764897A CN114068855A CN 114068855 A CN114068855 A CN 114068855A CN 202010764897 A CN202010764897 A CN 202010764897A CN 114068855 A CN114068855 A CN 114068855A
- Authority
- CN
- China
- Prior art keywords
- pole piece
- preparation
- polyvinylidene fluoride
- positive pole
- lithium ion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 21
- 239000000853 adhesive Substances 0.000 claims abstract description 19
- 230000001070 adhesive effect Effects 0.000 claims abstract description 19
- 239000002033 PVDF binder Substances 0.000 claims abstract description 18
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims abstract description 18
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 claims abstract description 17
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000007774 positive electrode material Substances 0.000 claims abstract description 11
- 239000006258 conductive agent Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 6
- 239000011206 ternary composite Substances 0.000 claims abstract description 4
- 239000003960 organic solvent Substances 0.000 claims description 27
- 238000003756 stirring Methods 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 239000002041 carbon nanotube Substances 0.000 claims description 9
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 9
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 3
- PFYQFCKUASLJLL-UHFFFAOYSA-N [Co].[Ni].[Li] Chemical compound [Co].[Ni].[Li] PFYQFCKUASLJLL-UHFFFAOYSA-N 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 2
- 229910000572 Lithium Nickel Cobalt Manganese Oxide (NCM) Inorganic materials 0.000 claims 1
- FBDMTTNVIIVBKI-UHFFFAOYSA-N [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] Chemical compound [O-2].[Mn+2].[Co+2].[Ni+2].[Li+] FBDMTTNVIIVBKI-UHFFFAOYSA-N 0.000 claims 1
- 229910002102 lithium manganese oxide Inorganic materials 0.000 claims 1
- VLXXBCXTUVRROQ-UHFFFAOYSA-N lithium;oxido-oxo-(oxomanganiooxy)manganese Chemical compound [Li+].[O-][Mn](=O)O[Mn]=O VLXXBCXTUVRROQ-UHFFFAOYSA-N 0.000 claims 1
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract description 2
- 239000007784 solid electrolyte Substances 0.000 abstract description 2
- HFCVPDYCRZVZDF-UHFFFAOYSA-N [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O Chemical compound [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O HFCVPDYCRZVZDF-UHFFFAOYSA-N 0.000 description 9
- -1 polyoxyethylene Polymers 0.000 description 7
- 238000005056 compaction Methods 0.000 description 4
- OTYYBJNSLLBAGE-UHFFFAOYSA-N CN1C(CCC1)=O.[N] Chemical compound CN1C(CCC1)=O.[N] OTYYBJNSLLBAGE-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
-
- 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
Abstract
The invention discloses a lithium ion battery positive pole piece and a preparation method thereof, wherein the positive pole piece comprises a positive active material, a conductive agent, an adhesive and a current collector, and the preparation method comprises the following steps: mixing dry powder, preparing slurry and preparing a pole piece. The polyvinylidene fluoride adhesive with a single positive pole is changed into a polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer and polyethylene oxide ternary composite adhesive system, the polyvinylidene fluoride-hexafluoropropylene copolymer can effectively reduce the crystallinity of the polyvinylidene fluoride and improve the conductivity of lithium ions, the addition of the polyethylene oxide can obviously improve the toughness of a pole piece and reduce the breakage rate of the pole piece during winding, and meanwhile, the polyvinylidene fluoride-hexafluoropropylene copolymer serving as a polymer solid electrolyte can also improve the conductivity of the lithium ions and reduce the internal resistance of a battery.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a lithium ion battery positive pole piece and a preparation method thereof.
Background
At the present stage, many enterprises are pursuing lithium ion batteries with higher energy density, and the technology for improving the energy density is different from company to company, wherein the technology for improving the material surface density and the compaction density is a method for effectively improving the energy density of the lithium ion batteries, but the pole piece compaction density is too high, so that brittle sheets are easy to appear, the pole piece is broken when being wound, and the too high compaction can lead the lithium ion migration path to be blocked or to be increased in a tortuous manner, so that the lithium ion migration rate is too slow, the ionic conductivity is reduced, the internal resistance of the battery is improved, and the battery performance is seriously influenced. Therefore, in view of the above-mentioned disadvantages, it is necessary to develop a high-compaction sheet having high toughness and excellent lithium ion conductivity.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a lithium ion battery positive pole piece and a preparation method thereof, aiming at improving the toughness of the positive pole piece, preventing the pole piece from being broken when being wound, improving the conductivity of lithium ions and reducing the internal resistance of the battery and the production cost of the battery.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a lithium ion battery positive pole piece and a preparation method thereof are provided, the positive pole piece comprises a positive active material, a conductive agent, an adhesive and a current collector, and the preparation method comprises the following steps:
s1: mixing dry powder: sequentially adding the positive active material, the conductive agent and the adhesive into a double-planet stirrer, starting revolution and rotation, and uniformly mixing;
s2: preparing slurry: adding the organic solvent into S1 for the first time, stirring and dispersing uniformly, adding the organic solvent for the second time, and stirring at a high speed;
s3: preparing a pole piece: and (5) vacuumizing the slurry uniformly dispersed in the S2 to remove bubbles, discharging, coating the slurry on the surface of the aluminum current collector, drying, rolling and slitting to prepare the positive pole piece.
The weight ratio of the positive active material to the conductive agent to the dry adhesive powder is 92-98%: 1.0-4.0%: 1.0 to 4.0 percent. Further, the weight ratio of the positive active material to the conductive agent to the dry adhesive powder is 95-98%: 1.0-2.5%: 1.0 to 2.5 percent.
The positive active material is one or more of nickel cobalt lithium manganate, nickel cobalt lithium aluminate, lithium manganate, lithium nickelate and lithium iron phosphate. Further, the positive active material is one or more of nickel cobalt lithium manganate and nickel cobalt lithium aluminate.
Further, the conductive agent is one or more of carbon nanotubes, conductive carbon fibers, conductive carbon black and conductive graphite.
Further, the adhesive is a polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer and polyethylene oxide ternary composite adhesive.
The adhesive is polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer and polyoxyethylene in a weight ratio of 40-70%: 10-30%: 10 to 30 percent. Furthermore, the adhesive is polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer and polyethylene oxide in a weight ratio of 50-70%: 10-20%: 20-30%.
The organic solvent is one or more of nitrogen methyl pyrrolidone, N-dimethylformamide, N-dimethylacetamide, acetone and acetonitrile. Further, the organic solvent is one or more of nitrogen methyl pyrrolidone, N-dimethylformamide and N, N-dimethylacetamide.
The percentage of the amount of the organic solvent added for the first time to the amount of the organic solvent added for the second time is 50-90%: 10 to 50 percent. Further, the percentage of the amount of the organic solvent added for the first time to the amount of the organic solvent added for the second time is 60-80%: 20 to 40 percent
The invention has the beneficial effects that: the polyvinylidene fluoride adhesive with a single positive pole is changed into a polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer and polyethylene oxide ternary composite adhesive system, the polyvinylidene fluoride-hexafluoropropylene copolymer can effectively reduce the crystallinity of the polyvinylidene fluoride and improve the conductivity of lithium ions, the addition of the polyethylene oxide can obviously improve the toughness of a pole piece and reduce the breakage rate of the pole piece during winding, and meanwhile, the polyvinylidene fluoride-hexafluoropropylene copolymer serving as a polymer solid electrolyte can also improve the conductivity of the lithium ions and reduce the internal resistance of a battery.
Detailed Description
The present invention is described in detail below with reference to specific embodiments, and the description in this section is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
Example 1:
s1: adding 97.6% of nickel cobalt lithium manganate, 0.2% of carbon nano tube, 1.0% of conductive carbon black, 0.6% of polyvinylidene fluoride, 0.24% of polyvinylidene fluoride-hexafluoropropylene copolymer and 0.36% of polyoxyethylene into a double-planet stirrer in sequence, starting revolution and autorotation, and uniformly mixing;
s2: adding 70% of the total amount of the organic solvent into S1 for the first time, stirring and dispersing uniformly, adding 30% of the total amount of the organic solvent for the second time, and stirring at a high speed;
s3: and (5) vacuumizing the slurry uniformly dispersed in the S2 to remove bubbles, discharging, coating the slurry on the surface of the aluminum current collector, drying, rolling and slitting to prepare the positive pole piece.
Example 2:
s1: adding 97.6% of nickel cobalt lithium manganate, 0.2% of carbon nano tube, 1.0% of conductive carbon black, 0.84% of polyvinylidene fluoride, 0.12% of polyvinylidene fluoride-hexafluoropropylene copolymer and 0.24% of polyoxyethylene into a double-planet stirrer in sequence, starting revolution and autorotation, and uniformly mixing;
s2: adding 70% of the total amount of the organic solvent into S1 for the first time, stirring and dispersing uniformly, adding 30% of the total amount of the organic solvent for the second time, and stirring at a high speed;
s3: and (5) vacuumizing the slurry uniformly dispersed in the S2 to remove bubbles, discharging, coating the slurry on the surface of the aluminum current collector, drying, rolling and slitting to prepare the positive pole piece.
Example 3:
s1: adding 97.6% of nickel cobalt lithium manganate, 0.2% of carbon nano tube, 1.0% of conductive carbon black, 0.72% of polyvinylidene fluoride, 0.12% of polyvinylidene fluoride-hexafluoropropylene copolymer and 0.36% of polyoxyethylene into a double-planet stirrer in sequence, starting revolution and autorotation, and uniformly mixing;
s2: adding 70% of the total amount of the organic solvent into S1 for the first time, stirring and dispersing uniformly, adding 30% of the total amount of the organic solvent for the second time, and stirring at a high speed;
s3: and (5) vacuumizing the slurry uniformly dispersed in the S2 to remove bubbles, discharging, coating the slurry on the surface of the aluminum current collector, drying, rolling and slitting to prepare the positive pole piece.
Example 4:
s1: adding 97.6% of nickel cobalt lithium manganate, 0.2% of carbon nano tube, 1.0% of conductive carbon black, 0.72% of polyvinylidene fluoride, 0.24% of polyvinylidene fluoride-hexafluoropropylene copolymer and 0.24% of polyoxyethylene into a double-planet stirrer in sequence, starting revolution and autorotation, and uniformly mixing;
s2: adding 70% of the total amount of the organic solvent into S1 for the first time, stirring and dispersing uniformly, adding 30% of the total amount of the organic solvent for the second time, and stirring at a high speed;
s3: and (5) vacuumizing the slurry uniformly dispersed in the S2 to remove bubbles, discharging, coating the slurry on the surface of the aluminum current collector, drying, rolling and slitting to prepare the positive pole piece.
Example 5:
s1: adding 97.6% of nickel cobalt lithium manganate, 0.2% of carbon nano tube, 1.0% of conductive carbon black, 0.72% of polyvinylidene fluoride, 0.24% of polyvinylidene fluoride-hexafluoropropylene copolymer and 0.24% of polyoxyethylene into a double-planet stirrer in sequence, starting revolution and autorotation, and uniformly mixing;
s2: adding 60% of the total amount of the organic solvent to S1 for the first time, stirring and dispersing uniformly, adding 40% of the total amount of the organic solvent for the second time, and stirring at a high speed;
s3: and (5) vacuumizing the slurry uniformly dispersed in the S2 to remove bubbles, discharging, coating the slurry on the surface of the aluminum current collector, drying, rolling and slitting to prepare the positive pole piece.
Example 6:
s1: adding 97.6% of nickel cobalt lithium manganate, 0.2% of carbon nano tube, 1.0% of conductive carbon black, 0.72% of polyvinylidene fluoride, 0.24% of polyvinylidene fluoride-hexafluoropropylene copolymer and 0.24% of polyoxyethylene into a double-planet stirrer in sequence, starting revolution and autorotation, and uniformly mixing;
s2: adding 80% of the total amount of the organic solvent into S1 for the first time, stirring and dispersing uniformly, adding 20% of the total amount of the organic solvent for the second time, and stirring at a high speed;
s3: and (5) vacuumizing the slurry uniformly dispersed in the S2 to remove bubbles, discharging, coating the slurry on the surface of the aluminum current collector, drying, rolling and slitting to prepare the positive pole piece.
Comparative example 1:
s1: 97.6 percent of nickel cobalt lithium manganate, 0.2 percent of carbon nano tube, 1.0 percent of conductive carbon black and 1.2 percent of polyvinylidene fluoride are sequentially added into a double-planet stirrer, and the revolution and the autorotation are started to be uniformly mixed;
s2: adding 70% of the total amount of the organic solvent into S1 for the first time, stirring and dispersing uniformly, adding 30% of the total amount of the organic solvent for the second time, and stirring at a high speed;
s3: and (5) vacuumizing the slurry uniformly dispersed in the S2 to remove bubbles, discharging, coating the slurry on the surface of the aluminum current collector, drying, rolling and slitting to prepare the positive pole piece.
The lithium ion battery positive pole piece and the preparation method thereof effectively improve the toughness of the positive pole piece, obviously reduce the breakage rate of the pole piece during winding, improve the conductivity of lithium ions, and reduce the internal resistance and the production cost of the battery.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.
Claims (8)
1. A lithium ion battery positive pole piece and a preparation method thereof are characterized in that the positive pole piece comprises a positive active material, a conductive agent, an adhesive and a current collector, and the preparation method comprises the following steps:
s1: mixing dry powder: sequentially adding the positive active material, the conductive agent and the adhesive into a double-planet stirrer, starting revolution and rotation, and uniformly mixing;
s2: preparing slurry: adding the organic solvent into S1 for the first time, stirring and dispersing uniformly, adding the organic solvent for the second time, and stirring at a high speed;
s3: preparing a pole piece: and (5) vacuumizing the slurry uniformly dispersed in the S2 to remove bubbles, discharging, coating the slurry on the surface of the aluminum current collector, drying, rolling and slitting to prepare the positive pole piece.
2. The lithium ion battery positive pole piece and the preparation method thereof according to claim 1 are characterized in that the weight ratio of the positive active material, the conductive agent and the adhesive dry powder is 92-98%: 1.0-4.0%: 1.0 to 4.0 percent.
3. The lithium ion battery positive electrode piece and the preparation method thereof according to claim 1, wherein the positive active material is one or more of lithium nickel cobalt manganese oxide, lithium nickel cobalt aluminate, lithium manganese oxide, lithium nickel oxide and lithium iron phosphate.
4. The lithium ion battery positive electrode piece and the preparation method thereof according to claim 1, wherein the conductive agent is one or more of carbon nanotubes, conductive carbon fibers, conductive carbon black and conductive graphite.
5. The lithium ion battery positive pole piece and the preparation method thereof according to claim 1, wherein the adhesive is a ternary composite adhesive of polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer and polyethylene oxide.
6. The positive pole piece of the lithium ion battery and the preparation method thereof according to claim 1 or 5, wherein the adhesive is polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene copolymer and polyethylene oxide, and the weight ratio is 40-70%: 10-30%: 10 to 30 percent.
7. The lithium ion battery positive electrode piece and the preparation method thereof according to claim 1, wherein the organic solvent is one or more of azomethylpyrrolidone, N-dimethylformamide, N-dimethylacetamide, acetone and acetonitrile.
8. The lithium ion battery positive pole piece and the preparation method thereof according to claim 1, wherein the percentage of the amount of the organic solvent added for the first time to the amount of the organic solvent added for the second time is 50-90%: 10 to 50 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764897.0A CN114068855A (en) | 2020-08-03 | 2020-08-03 | Lithium ion battery positive pole piece and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010764897.0A CN114068855A (en) | 2020-08-03 | 2020-08-03 | Lithium ion battery positive pole piece and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114068855A true CN114068855A (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010764897.0A Pending CN114068855A (en) | 2020-08-03 | 2020-08-03 | Lithium ion battery positive pole piece and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114068855A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160028107A1 (en) * | 2014-07-23 | 2016-01-28 | Toyota Jidosha Kabushiki Kaisha | Method of manufacturing positive electrode for solid-state battery, method of manufacturing solid-state battery, and positive electrode slurry |
| CN106486639A (en) * | 2015-09-01 | 2017-03-08 | 深圳市比克动力电池有限公司 | A kind of lithium battery pole slice and preparation method thereof |
| CN111276690A (en) * | 2020-02-19 | 2020-06-12 | 中国科学院过程工程研究所 | Low-porosity positive pole piece, preparation method thereof and application of positive pole piece in solid-state lithium metal battery |
-
2020
- 2020-08-03 CN CN202010764897.0A patent/CN114068855A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160028107A1 (en) * | 2014-07-23 | 2016-01-28 | Toyota Jidosha Kabushiki Kaisha | Method of manufacturing positive electrode for solid-state battery, method of manufacturing solid-state battery, and positive electrode slurry |
| CN106486639A (en) * | 2015-09-01 | 2017-03-08 | 深圳市比克动力电池有限公司 | A kind of lithium battery pole slice and preparation method thereof |
| CN111276690A (en) * | 2020-02-19 | 2020-06-12 | 中国科学院过程工程研究所 | Low-porosity positive pole piece, preparation method thereof and application of positive pole piece in solid-state lithium metal battery |
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Application publication date: 20220218 |
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