CN112736222B - Preparation method of bipolar electrode - Google Patents
Preparation method of bipolar electrode Download PDFInfo
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- CN112736222B CN112736222B CN202011567430.3A CN202011567430A CN112736222B CN 112736222 B CN112736222 B CN 112736222B CN 202011567430 A CN202011567430 A CN 202011567430A CN 112736222 B CN112736222 B CN 112736222B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000011241 protective layer Substances 0.000 claims abstract description 44
- 239000007773 negative electrode material Substances 0.000 claims abstract description 39
- 239000007774 positive electrode material Substances 0.000 claims abstract description 39
- 239000000853 adhesive Substances 0.000 claims abstract description 24
- 230000001070 adhesive effect Effects 0.000 claims abstract description 24
- 239000010410 layer Substances 0.000 claims abstract description 19
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 238000000576 coating method Methods 0.000 claims abstract description 18
- 229920002545 silicone oil Polymers 0.000 claims abstract description 16
- 239000011267 electrode slurry Substances 0.000 claims abstract description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims abstract description 10
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 10
- 239000010703 silicon Substances 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims abstract description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 24
- 239000011888 foil Substances 0.000 claims description 22
- 229910052782 aluminium Inorganic materials 0.000 claims description 20
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 19
- 229910052802 copper Inorganic materials 0.000 claims description 17
- 239000010949 copper Substances 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910052759 nickel Inorganic materials 0.000 claims description 12
- 229920006254 polymer film Polymers 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 6
- 230000000996 additive effect Effects 0.000 claims description 6
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052737 gold Inorganic materials 0.000 claims description 6
- 239000010931 gold Substances 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- 238000007747 plating Methods 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- 239000002905 metal composite material Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 239000010405 anode material Substances 0.000 abstract description 5
- 239000010406 cathode material Substances 0.000 abstract description 5
- 238000005056 compaction Methods 0.000 abstract description 5
- 239000011247 coating layer Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000011889 copper foil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 239000006256 anode slurry Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000006257 cathode slurry Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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
-
- 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
-
- 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
-
- 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
- H01M4/0435—Rolling or calendering
-
- 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
- H01M2004/029—Bipolar 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention provides a bipolar electrode and a preparation method thereof, and the preparation method comprises the following steps: s1, taking the two protective layers and respectively coating silicone oil on the two protective layers to form silicone oil layers; s2, respectively coating the silicon oil layers of the two protective layers with positive electrode slurry and negative electrode slurry, and drying to obtain a positive electrode material and a negative electrode material with the protective layers; s3, rolling the positive electrode material and the negative electrode material respectively; s4, taking a bipolar current collector, and respectively coating positive conductive adhesive and negative conductive adhesive on the surfaces of the two sides of the bipolar current collector; and S5, respectively attaching the positive electrode material and the negative electrode material to the positive electrode conductive adhesive and the negative electrode conductive adhesive of the bipolar current collector, applying pressure F to the positive electrode material and the negative electrode material at a temperature T to enable the positive electrode material and the negative electrode material to be attached to the bipolar current collector, and removing the protective layer to obtain the bipolar electrode. The invention can lead the anode material and the cathode material to reach the ideal compaction density, thereby better exerting the performance of the battery.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a preparation method of a bipolar electrode.
Background
In the manufacturing process of the lithium battery, after the surface of the current collector is coated with the positive electrode slurry or the negative electrode slurry and baked, the positive electrode material and the negative electrode material need to be rolled so as to achieve the purposes of enhancing the peeling strength, reducing the ion transmission distance, improving the battery performance and the like.
In the rolling process of the traditional lithium battery pole piece, the requirements of the positive electrode material and the negative electrode material on the rolling pressure are different, and the positive electrode material and the negative electrode material are respectively attached to independent current collectors, so that the traditional lithium battery pole piece can be independently rolled without being influenced. However, for the bipolar battery, the positive electrode material and the negative electrode material are simultaneously coated on two sides of the same bipolar current collector, and when the bipolar current collector is rolled, the positive electrode material and the negative electrode material on the two sides of the bipolar current collector are subjected to the same pressure, so that the situation that one of the positive electrode material and the negative electrode material is insufficiently or excessively compacted can be caused, and further the battery performance is affected.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a preparation method of a bipolar electrode.
The invention provides a preparation method of a bipolar electrode, which comprises the following steps:
s1, taking the two protective layers and respectively coating silicone oil on the two protective layers to form silicone oil layers;
s2, respectively coating the silicon oil layers of the two protective layers with positive electrode slurry and negative electrode slurry, and drying to obtain a positive electrode material and a negative electrode material with the protective layers;
s3, rolling the positive electrode material and the negative electrode material respectively;
s4, taking a bipolar current collector, and respectively coating positive conductive adhesive and negative conductive adhesive on the surfaces of the two sides of the bipolar current collector;
and S5, respectively attaching the positive electrode material and the negative electrode material to the positive electrode conductive adhesive and the negative electrode conductive adhesive of the bipolar current collector, applying pressure F to the positive electrode material and the negative electrode material at a temperature T to enable the positive electrode material and the negative electrode material to be attached to the bipolar current collector, and removing the protective layer to obtain the bipolar electrode.
Preferably, the protective layer in step S1 is a metal foil, a composite metal foil, or a polymer film.
Preferably, the viscosity of the silicone oil is 10-500cps in step S1, and the surface density of the silicone oil layer is 5-20g/m 2 。
Preferably, the drying temperature in step S2 is 100 ℃ to 120 ℃, and the drying time is 10 hours to 15 hours.
Preferably, the thickness of the positive electrode conductive paste and the negative electrode conductive paste in step S4 is 1 to 10 μm.
Preferably, the positive conductive paste in step S4 is formed by mixing one or more of gold, silver, copper, aluminum, zinc, iron, nickel, and graphite particles with a resin matrix and an additive, and the negative conductive paste is formed by mixing one or more of gold, silver, copper, aluminum, zinc, iron, nickel, and graphite particles with a resin matrix and an additive.
Preferably, the thickness of the bipolar current collector described in step S4 is 5-30 μm.
Preferably, the bipolar current collector in step S4 is a metal composite foil formed by aluminum and one or both of copper and nickel.
Preferably, the bipolar current collector in step S4 is a polymer foil formed by plating one or two of aluminum, copper and nickel on the surface of the polymer film or the porous polymer film.
Preferably, the temperature T is 10-80 ℃ and the pressure F is 200-800kg in step S5.
According to the preparation method of the bipolar electrode, the positive electrode material and the negative electrode material are respectively rolled and then transferred onto the bipolar current collector, so that the positive electrode material and the negative electrode material can reach ideal compaction density, the performance of the battery is better exerted, and the situation of insufficient compaction or over-pressure caused by the fact that the positive electrode material and the negative electrode material on two sides of the same bipolar current collector are subjected to the same pressure is avoided. The invention does not relate to rolling of the bipolar current collector, and does not influence the structure of the bipolar current collector, so that the bipolar current collector can be compatible with more materials.
Drawings
FIG. 1 is a flow chart of a method for preparing a bipolar electrode according to the present invention;
FIG. 2 is a schematic diagram of a bipolar electrode fabricated according to one embodiment;
FIG. 3 is a schematic diagram of a bipolar electrode fabricated in accordance with example two;
FIG. 4 is a structural view of a positive electrode material with a protective layer in an embodiment;
FIG. 5 is a structural view of a negative electrode material with a protective layer in an example.
Detailed Description
Referring to fig. 1, the invention provides a method for preparing a bipolar electrode, comprising the following steps:
s1, taking the two protective layers and respectively coating silicone oil on the two protective layers to form silicone oil layers;
in this embodiment, the protective layer is a metal foil, a composite metal foil, or a polymer film. The viscosity of the silicone oil is 10-500cps, and the surface density of the silicone oil layer is 5-20g/m 2 。
S2, respectively coating the silicon oil layers of the two protective layers with positive electrode slurry and negative electrode slurry, and drying to obtain a positive electrode material and a negative electrode material with the protective layers;
in the embodiment, the drying temperature is 100-120 ℃, and the drying time is 10-15 hours.
And S3, rolling the positive electrode material and the negative electrode material respectively.
S4, taking a bipolar current collector, and respectively coating positive conductive adhesive and negative conductive adhesive on the surfaces of the two sides of the bipolar current collector;
in this embodiment, the thickness of the bipolar current collector is 5 to 30 μm, and the bipolar current collector is a metal composite foil formed by aluminum and one or both of copper and nickel, or a polymer foil formed by aluminum plating, copper and nickel on the surface of a polymer film or a porous polymer film. The thickness of the positive conductive adhesive and the negative conductive adhesive is 1-10 μm. The positive conductive adhesive is formed by mixing one or more of gold, silver, copper, aluminum, zinc, iron, nickel and graphite particles with a resin matrix and an additive. The negative conductive adhesive is formed by mixing one or more of gold, silver, copper, aluminum, zinc, iron, nickel and graphite particles with a resin matrix and an additive.
And S5, respectively attaching the positive electrode material and the negative electrode material to the positive electrode conductive adhesive and the negative electrode conductive adhesive of the bipolar current collector, applying pressure F to the positive electrode material and the negative electrode material at a temperature T to enable the positive electrode material and the negative electrode material to be attached to the bipolar current collector, and removing the protective layer to obtain the bipolar electrode. In this embodiment, the temperature T is 10-80 deg.C, and the pressure F is 200-800 kg.
According to the invention, the anode slurry and the cathode slurry are coated on the mutually independent protective layers 5, the ideal compaction density is achieved after rolling, and then the rolled anode material and cathode material are transferred onto the bipolar current collector 1, so that the situation of insufficient compaction or over-pressure caused by the fact that the anode material and the cathode material on two sides of the same bipolar current collector 1 are subjected to the same pressure is avoided. The rolling of the bipolar current collector 1 is not involved, the structure of the bipolar current collector 1 is not affected, and therefore the bipolar current collector 1 made of more materials can be compatible, the protective layer 5 used in the invention can be reused, and the waste of materials is avoided.
To verify the feasibility and accuracy of this embodiment, two examples are listed below.
Example one
Selecting 20 μm aluminum foil as protective layer 5, coating silicon oil layer 6 on one side of protective layer 5, wherein the viscosity of silicon oil is 100cps, and the surface density of silicon oil layer 6 is 5g/m 2 (ii) a Respectively coating positive electrode slurry and negative electrode slurry on the surfaces of the two protective layers 5 coated with the silicone oil and baking at the baking temperature of 110 ℃ for 12 hours to obtain a positive electrode material and a negative electrode material with the protective layers; the protective layers 5 coated with the positive electrode material 3 and the negative electrode material 4 are respectively rolled to obtain the rolled positive electrode material 3 and the rolled negative electrode material 4, as shown in fig. 4 and 5.
A metal composite foil formed by compounding 20-micron aluminum foil 11 and copper foil 12 is used as the bipolar current collector 1, aluminum conductive adhesive with the thickness of 1.5 microns is coated on the surface of one side of the bipolar current collector 1, and copper conductive adhesive with the thickness of 1.5 microns is coated on the surface of the other side of the bipolar current collector 1. And (3) attaching the rolled positive electrode material 3 on the surface of the protective layer 5 to the aluminum foil surface of the bipolar current collector 1, and attaching the rolled negative electrode material 4 on the surface of the protective layer 5 to the copper foil surface of the bipolar current collector 1. And then applying 400kg of pressure to the two protective layers at the temperature of 25 ℃, and pressing the positive electrode material 3 and the negative electrode material 4 on the surface of the protective layer 5 onto the bipolar current collector 1 to obtain the bipolar electrode, as shown in fig. 2.
Example two
Selecting a PET film with the thickness of 25 mu m as a protective layer 5, coating a silicon oil layer 6 on one side of the protective layer 5, wherein the viscosity of the silicon oil is 200cps, and the surface density of the silicon oil layer 6The degree is 8g/m 2； Respectively coating positive electrode slurry and negative electrode slurry on the surfaces of the two protective layers 5 coated with the silicone oil and baking at the baking temperature of 110 ℃ for 12 hours to obtain a positive electrode material and a negative electrode material with the protective layers; the protective layer 5 coated with the cathode material 3 or the anode material 4 is rolled to obtain the rolled cathode material 3 and anode material 4, as shown in fig. 4 and 5.
Selecting a polymer foil material with an aluminum coating layer 11 and a copper coating layer 12 on the surface of a polymer film 13 as a bipolar current collector 1, wherein the polymer film 13 is a PP film with the thickness of 12 microns, the aluminum coating layer 11 on the surface is 1 micron, and the copper coating layer 12 on the surface is 0.8 micron; and coating aluminum conductive adhesive with the thickness of 1.5 mu m on the surface of the aluminum plating layer 11 of the polymeric foil, and coating copper conductive adhesive with the thickness of 1.5 mu m on the surface of the copper plating layer 12 of the polymeric foil. And (3) attaching the positive electrode material 3 on the surface of the rolled protective layer 5 to an aluminum-plated layer 11 of the polymeric foil, and attaching the negative electrode material 4 on the surface of the rolled protective layer 5 to a copper-aluminum layer 12 of the polymeric foil. Subsequently, the positive electrode material 3 and the negative electrode material 4 on the surface of the protective layer 5 are transferred to a polymer foil at a temperature of 40 ℃ and a pressure of 300kg, and a bipolar electrode is obtained, as shown in fig. 3.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A preparation method of a bipolar electrode is characterized by comprising the following steps:
s1, taking the two protective layers and respectively coating silicone oil on the two protective layers to form silicone oil layers;
s2, respectively coating the silicon oil layers of the two protective layers with positive electrode slurry and negative electrode slurry, and drying to obtain a positive electrode material and a negative electrode material with the protective layers;
s3, rolling the positive electrode material and the negative electrode material respectively, wherein the rolling pressures of the positive electrode material and the negative electrode material are different;
s4, taking the bipolar current collector, and respectively coating the surfaces of the two sides of the bipolar current collector with positive conductive adhesive and negative conductive adhesive;
s5, respectively attaching the positive electrode material and the negative electrode material to the positive electrode conductive adhesive and the negative electrode conductive adhesive of the bipolar current collector, applying pressure F to the positive electrode material and the negative electrode material at a temperature T to enable the positive electrode material and the negative electrode material to be attached to the bipolar current collector, and removing the protective layer to obtain the bipolar electrode;
in step S5, the temperature T is 10-80 ℃, and the pressure F is 200-800 kg; the bipolar electrode is used for a lithium battery.
2. The method for preparing a bipolar electrode according to claim 1, wherein the protective layer in step S1 is a metal foil, a composite metal foil, or a polymer film.
3. The method for preparing a bipolar electrode according to claim 1, wherein the viscosity of the silicone oil is 10 to 500cps and the areal density of the silicone oil layer is 5 to 20g/m in step S1 2 。
4. The method for preparing a bipolar electrode according to any one of claims 1 to 3, wherein the drying temperature is 100 ℃ to 120 ℃ and the drying time is 10 to 15 hours in step S2.
5. The method for preparing a bipolar electrode according to any one of claims 1 to 3, wherein the thickness of the positive electrode conductive paste and the negative electrode conductive paste in step S4 is 1 to 10 μm.
6. The method for preparing a bipolar electrode according to any one of claims 1 to 3, wherein the positive conductive paste is one or more of gold, silver, copper, aluminum, zinc, iron, nickel, and graphite particles mixed with a resin matrix and an additive in step S4, and the negative conductive paste is one or more of gold, silver, copper, aluminum, zinc, iron, nickel, and graphite particles mixed with a resin matrix and an additive.
7. The bipolar electrode preparation method according to any one of claims 1 to 3, wherein the thickness of the bipolar current collector in step S4 is 5 to 30 μm.
8. The method for preparing a bipolar electrode according to any one of claims 1 to 3, wherein the bipolar current collector in step S4 is a metal composite foil formed by aluminum and one or both of copper and nickel.
9. The method for preparing a bipolar electrode according to any one of claims 1 to 3, wherein the bipolar current collector in step S4 is a polymer foil formed by plating one or two of aluminum, copper and nickel on the surface of the polymer film.
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| JP2011253804A (en) * | 2010-05-07 | 2011-12-15 | Nissan Motor Co Ltd | Electrode structure, method of manufacturing the same and bipolar battery |
| CN103219521B (en) * | 2012-01-20 | 2015-07-08 | 北京好风光储能技术有限公司 | Bipolarity current collector and preparation method |
| JP5621824B2 (en) * | 2012-10-02 | 2014-11-12 | 日産自動車株式会社 | Battery electrode and manufacturing method thereof |
| TWI502792B (en) * | 2012-12-27 | 2015-10-01 | Eternal Materials Co Ltd | Membrane electrode and method of preparing same |
| JP2018049791A (en) * | 2016-09-23 | 2018-03-29 | 株式会社豊田自動織機 | Power storage device |
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| CN106898825B (en) * | 2017-05-03 | 2019-02-05 | 江苏强劲新能源科技有限公司 | A kind of preparation method of bipolarity Zinc ion battery |
| CN107240721B (en) * | 2017-05-27 | 2020-01-31 | 深圳市雄韬电源科技股份有限公司 | Bipolar electrode, lithium ion battery and manufacturing method of lithium ion battery |
| CN108390068A (en) * | 2018-02-09 | 2018-08-10 | 合肥国轩高科动力能源有限公司 | Bipolar current collector and preparation method thereof |
| CN108777286A (en) * | 2018-05-31 | 2018-11-09 | 合肥国轩高科动力能源有限公司 | Surface modification method of metal lithium |
| CN111430671B (en) * | 2019-12-26 | 2022-06-21 | 蜂巢能源科技有限公司 | Bipolar pole piece and preparation method thereof, lithium ion battery and preparation method thereof |
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