CN111048787A - Manufacturing method of flexible composite current collector - Google Patents
Manufacturing method of flexible composite current collector Download PDFInfo
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- CN111048787A CN111048787A CN201911267762.7A CN201911267762A CN111048787A CN 111048787 A CN111048787 A CN 111048787A CN 201911267762 A CN201911267762 A CN 201911267762A CN 111048787 A CN111048787 A CN 111048787A
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/665—Composites
- H01M4/667—Composites in the form of layers, e.g. coatings
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
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- 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 provides a manufacturing method of a flexible composite current collector, wherein the flexible composite current collector comprises a supporting layer, first conducting layers positioned on two sides of the supporting layer and second conducting layers positioned on the outer sides of the first conducting layers, and the manufacturing method comprises the following steps of (1) preparing the supporting layer: manufacturing a supporting layer; (2) vacuum plating: plating the first conductive layer to two sides of the supporting layer in a vacuum environment in a plating mode; (3) coating: preparing a conductive paste, and attaching the conductive paste to the first conductive layer in a coating manner, namely forming the second conductive layer on the first conductive layer, thereby forming a sample; (4) rolling: and rolling the formed sample to obtain the flexible composite current collector. According to the manufacturing method, the second conducting layer is attached to the first conducting layer in a coating mode, the damage of rolling to the first conducting layer is reduced through the second conducting layer, and the cost of multi-layer vacuum plating is reduced.
Description
Technical Field
The invention belongs to the technical field of current collector manufacturing, and particularly relates to a manufacturing method of a flexible composite current collector.
Background
Along with the increase of the requirements of people on energy density, the lightweight design of the battery is more and more emphasized by people, besides the improvement of the proportion of active substances in a formula in the slurry mixing process, the reduction of the quality of a current collector also becomes a method, and the current method for reducing the quality of the current collector is mainly realized by perforating a foil material and an organic supporting layer and adding a metal conducting layer.
However, when the conventional foil with direct perforation is rolled for sheet making, especially in a high-compaction state, the deformation of the manufactured pole piece can be caused; the conductive layer is constructed on the surface layer of the organic supporting layer in a rolling, transfer, electrolysis, vacuum, magnetic control and other modes, so that the extension during rolling is large due to the large extension of the organic supporting layer, and the two sides of the organic supporting layer are not conducted, so that the internal resistance of the current collector is large; therefore, according to the traditional manufacturing scheme of the flexible current collector, the elongation of the current collector is high, and the conducting layer and the supporting layer are easily extruded by positive and negative electrode materials in the rolling stage, so that the cycle performance of the battery is influenced.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a method for manufacturing a flexible composite current collector.
In order to achieve the above objects or other objects, the present invention is achieved by the following technical solutions:
a manufacturing method of a flexible composite current collector comprises a supporting layer, a first conducting layer positioned on two sides of the supporting layer and a second conducting layer positioned on the outer side of the first conducting layer, and comprises the following steps,
(1) preparing a support layer: manufacturing a supporting layer with the thickness of 4-15um by taking one of polyethylene, polypropylene, polyethylene terephthalate and polyethylene glycol terephthalate as a raw material;
(2) vacuum plating: plating the first conducting layer on two sides of the supporting layer manufactured in the step (1) in a plating mode in a vacuum environment of not higher than 10 & lt-4 & gt Pa;
(3) coating: the conductive paste is prepared by taking conductive particles, a film-forming agent, a solvent and an auxiliary agent as raw materials, wherein when the conductive particles are metal particles, the viscosity of the conductive paste is 10-45 MPa.s, and the solid content is 45-80%; when the conductive particles are nonmetal particles, the viscosity of the conductive slurry is 50-100 MPa.s, and the solid content is 8-15%; attaching the prepared conductive slurry to the first conductive layer in the step (2) in a coating manner, and baking and rolling to form a second conductive layer on the first conductive layer, thereby forming a sample of the composite current collector;
(4) rolling: and (4) rolling the sample formed in the step (3) to obtain the flexible composite current collector.
Further, after the vacuum plating in the step (2) is completed and before the coating in the step (3) is started, punching is further included: and forming a plurality of rows of connecting holes on the supporting layer and the first conducting layers on two sides in a mechanical punching or laser punching mode, wherein the aperture of each connecting hole is 50-100 um.
Further, the pitch of two adjacent rows of connecting holes in the multiple rows of connecting holes is 100-2000um, and the pitch of two adjacent connecting holes in each row of connecting holes is 100-2000 um.
Further, in the step (2), the thickness of the first conductive layer is 1-3 um.
Further, in the step (3), the thickness of the second conducting layer is 1-5 um.
Further, in the step (3), the non-metal particles are one of carbon black, graphite flakes and graphene; the metal particles are high-purity gold particles or high-purity silver particles.
Further, in the step (3), the baking temperature is 80-120 ℃, and the baking time is 8-15h
Further, in the step (4), the rolling temperature is 105-110 ℃ of hot roller.
Has the advantages that:
the flexible composite current collector manufactured by the manufacturing method comprises a first conducting layer and a second conducting layer, wherein the second conducting layer is attached to the first conducting layer in a coating mode, so that the cost of multilayer vacuum plating is reduced;
the roll pressing after the coating is finished can be helpful for further film forming and curing of the second conducting layer, the current collector is extended and shaped in advance, and the extension rate of the subsequent battery pole piece in the roll pressing process is reduced;
the current collector does not have a second conducting layer or has a small size, and the second conducting layer can reduce the mechanical damage of positive electrode particles to the first conducting layer in rolling of the current collector sheet due to the fact that the first conducting layer is thin; the coating thickness can be used as a buffer layer between the positive electrode particles and the first conducting layer after reaching the later 1um, and the positive electrode particles with the diameter of 3-15um are resisted, so that the direct contact with the first conducting layer is avoided, the elongation rate of the current collector and the internal resistance of the battery are reduced, and the cycle performance of the battery is improved;
according to the invention, the formed current collector is perforated, so that a plurality of rows of connecting holes are formed, slurry can enter the connecting holes in the subsequent coating process, the two formed second conducting layers are connected, and the second conducting layers can be in contact with the supporting layer.
Drawings
FIG. 1 is a schematic diagram of a completed structure prepared in example 5 of the present invention;
in the figure: 1. a support layer; 2. a first conductive layer; 3. a second conductive layer; 4. and connecting the holes.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Before the present embodiments are further described, it is to be understood that the scope of the invention is not limited to the particular embodiments described below; it is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention.
The flexible composite current collector comprises a supporting layer, first conducting layers positioned on two sides of the supporting layer and second conducting layers positioned on the outer sides of the first conducting layers, and the manufacturing method comprises the following steps:
(1) preparing a support layer: one of polyethylene, polypropylene, polyethylene terephthalate and polyethylene terephthalate is used as a raw material to manufacture a supporting layer with the thickness of 4-15 um;
(2) vacuum plating: plating first conducting layers on two sides of the supporting layer manufactured in the step (1) in a vacuum environment with the pressure of 10 & lt-4 & gt Pa or less in a plating mode, wherein the first conducting layers are made of one of copper, aluminum, nickel and stainless steel, and the thickness of the first conducting layers is 1-3 microns;
(3) coating: preparing conductive slurry by taking conductive particles, a film forming agent, a solvent and an auxiliary agent as raw materials, wherein the solvent is one or more of alcohol esters such as ethanol, isopropanol and the like, and the film forming agent is a silane coupling agent; when the conductive particles are high-purity gold particles or high-purity silver particles, the viscosity of the conductive paste is 10-45 MPa.s, and the solid content is 45-80%; when the conductive particles are one of carbon black, graphite flakes and graphene, the viscosity of the conductive slurry is 50-100 MPa.s, and the solid content is 8-15%; attaching the prepared conductive slurry to the first conductive layer in the step (2) in a coating manner, and baking and rolling to form a second conductive layer on the first conductive layer, wherein the thickness of the second conductive layer is 1-5 um, so that a sample of the composite current collector is formed;
(4) rolling: and (4) carrying out hot rolling on the sample formed in the step (3) at 105-110 ℃ to obtain the flexible composite current collector.
The further technical scheme of the invention is that after the vacuum plating in the step (2) is finished and before the coating in the step (3) is started, the method also comprises a punching step, and the method specifically comprises the following steps: form the multirow connecting hole on the first conducting layer of supporting layer and both sides with mechanical punching or laser beam drilling's mode, the aperture of connecting hole is 50-100um, the hole pitch of two adjacent rows of connecting holes is 100 ~ 2000um in the multirow connecting hole, the hole pitch of two adjacent connecting holes is 100 ~ 2000um in every row of connecting hole, the multirow connecting hole of formation in the follow-up coating process, the thick liquids can get into in the connecting hole, connect between the two-layer second conducting layer that makes the formation, and can form the contact between messenger's second conducting layer and the supporting layer, the both ends of mass flow body are connected to this kind of construction mode, the internal resistance at mass flow both ends has been uniformized, make the battery current more even in the use.
Example 1
A method for manufacturing a flexible composite current collector comprises the following steps,
(1) preparing a support layer: manufacturing a supporting layer with the thickness of 10um by taking polyethylene terephthalate as a raw material;
(2) vacuum plating: plating a first conductive layer with a conductive aluminum layer to two sides of the supporting layer manufactured in the step (1) in a plating mode in a vacuum environment with the pressure of not higher than 10-4Pa, wherein the plating thickness is 1 um;
(3) coating: preparing conductive paste by using graphene, a film-forming agent, a solvent and an auxiliary agent as raw materials, wherein the viscosity of the conductive paste is 80MPa.s, and the solid content of the conductive paste is 10%; attaching the prepared conductive slurry to the first conductive layer in the step (2) in a coating manner, baking at 110 ℃, and rolling to form a second conductive layer on the first conductive layer, wherein the thickness of the second conductive layer is 1um, so that a sample of the composite current collector is formed;
(4) rolling: and (4) carrying out hot rolling on the sample formed in the step (3) at 105 ℃, thus obtaining the flexible composite current collector.
Example 2
A method for manufacturing a flexible composite current collector comprises the following steps,
(1) preparing a support layer: manufacturing a supporting layer with the thickness of 4um by taking polyethylene terephthalate as a raw material;
(2) vacuum plating: plating a conductive copper layer serving as a first conductive layer to two sides of the supporting layer manufactured in the step (1) in a vacuum environment with the pressure of not higher than 10-4Pa in a plating mode, wherein the plating thickness is 1 um;
(3) coating: preparing conductive paste by using graphene, a film-forming agent, a solvent and an auxiliary agent as raw materials, wherein the viscosity of the conductive paste is 75MPa.s, and the solid content of the conductive paste is 8%; attaching the prepared conductive slurry to the first conductive layer in the step (2) in a coating manner, baking at 110 ℃, and rolling to form a second conductive layer on the first conductive layer, wherein the thickness of the second conductive layer is 3um, so as to form a sample of the composite current collector;
(4) rolling: and (4) carrying out hot rolling on the sample formed in the step (3) at 110 ℃, thus obtaining the flexible composite current collector.
Example 3
A method for manufacturing a flexible composite current collector comprises the following steps,
(1) preparing a support layer: manufacturing a supporting layer with the thickness of 8um by taking polyethylene terephthalate as a raw material;
(2) vacuum plating: plating a conductive aluminum layer serving as a first conductive layer to two sides of the supporting layer manufactured in the step (1) in a plating mode in a vacuum environment of not more than 10-4Pa, wherein the plating thickness is 3 um;
(3) coating: preparing conductive paste by using graphene, a film-forming agent, a solvent and an auxiliary agent as raw materials, wherein the viscosity of the conductive paste is 50MPa.s, and the solid content of the conductive paste is 10%; attaching the prepared conductive slurry to the first conductive layer in the step (2) in a coating manner, baking at 110 ℃, and rolling to form a second conductive layer on the first conductive layer, wherein the thickness of the second conductive layer is 1um, so that a sample of the composite current collector is formed;
(4) rolling: and (4) carrying out hot rolling on the sample formed in the step (3) at 105 ℃, thus obtaining the flexible composite current collector.
Example 4
A method for manufacturing a flexible composite current collector comprises the following steps,
(1) preparing a support layer: manufacturing a supporting layer with the thickness of 10um by taking polyethylene terephthalate as a raw material;
(2) vacuum plating: plating a first conductive layer with a conductive aluminum layer to two sides of the supporting layer manufactured in the step (1) in a plating mode in a vacuum environment with the pressure of not higher than 10-4Pa, wherein the plating thickness is 1 um;
(3) coating: preparing conductive paste by using high-purity silver particles, a film-forming agent, a solvent and an auxiliary agent as raw materials, wherein the viscosity of the conductive paste is 30MPa.s, and the solid content is 55%; attaching the prepared conductive slurry to the first conductive layer in the step (2) in a coating manner, baking at 120 ℃, and rolling to form a second conductive layer on the first conductive layer, wherein the thickness of the second conductive layer is 1um, so that a sample of the composite current collector is formed;
(4) rolling: and (4) carrying out hot rolling on the sample formed in the step (3) at 110 ℃, thus obtaining the flexible composite current collector.
Example 5
A method for manufacturing a flexible composite current collector comprises the following steps,
(1) preparing a support layer: manufacturing a supporting layer with the thickness of 10um by taking polyethylene terephthalate as a raw material;
(2) vacuum plating: plating a first conductive layer with a conductive aluminum layer to two sides of the supporting layer manufactured in the step (1) in a plating mode in a vacuum environment with the pressure of not higher than 10-4Pa, wherein the plating thickness is 1 um;
(3) punching: forming a plurality of rows of connecting holes on the supporting layer and the first conducting layers on two sides in a laser drilling mode, wherein the aperture of each connecting hole is 10 microns, the pitch of two adjacent rows of connecting holes in the plurality of rows of connecting holes is 20mm, and the pitch of two adjacent connecting holes in each row of connecting holes is 20 mm;
(4) coating: preparing conductive paste by using graphene, a film-forming agent, a solvent and an auxiliary agent as raw materials, wherein the viscosity of the conductive paste is 80MPa.s, and the solid content of the conductive paste is 10%; attaching the prepared conductive slurry to the first conductive layer in the step (2) in a coating manner, baking at 110 ℃, and rolling to form a second conductive layer on the first conductive layer, wherein the thickness of the second conductive layer is 1um, so that a sample of the composite current collector is formed;
(5) rolling: and (4) carrying out hot rolling on the sample formed in the step (3) at 105 ℃, thus obtaining the flexible composite current collector.
Comparative example 1
A manufacturing method of a flexible composite current collector comprises the following steps:
the supporting layer with the thickness of 10um is made of polyethylene glycol terephthalate and is not higher than 10-4And evaporating and aluminizing in a vacuum environment of Pa, and cooling in a liquid nitrogen environment to form conductive aluminum layers with the thickness of 1um on two sides of the supporting layer, thereby obtaining the double-layer conductive composite current collector.
The performance of the composite current collectors manufactured in examples 1 to 5 and comparative example 1, the performance of the composite current collector prepared into a corresponding pole piece, and the performance of the composite current collector prepared into a corresponding battery were respectively detected, and the detection data are shown in table 1.
TABLE 1
As can be seen from Table 1, in example 1, compared with comparative example 1, the sheet resistance of the foil is not changed much, but the resistivity of the prepared pole piece is obviously reduced, the elongation rate in the rolling process is also relieved to a certain extent, and the internal resistance of the battery is obviously reduced; in embodiment 3, the sheet resistance of the foil is improved by increasing the thickness of the plating layer, and the performance of the pole piece can also be improved by coating the second conductive layer; embodiment 4, the coating of metal conductive particles is adopted, and on the basis of reducing the sheet resistance of the foil, the specific resistance elongation rate of a pole piece and the internal resistance of a battery are reduced; compared with the embodiment 1, the embodiment 5 has the advantages that the punching process is carried out, the resistivity of the pole piece is reduced, the peeling strength of the pole piece is improved to a large extent, the internal resistance of the pole piece is more uniform, and the internal resistance of the battery is reduced.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (8)
1. A manufacturing method of a flexible composite current collector is characterized by comprising a supporting layer (1), a first conducting layer (2) positioned on two sides of the supporting layer and a second conducting layer (3) positioned on the outer side of the first conducting layer, and comprises the following steps,
(1) preparing a support layer: one of polyethylene, polypropylene, polyethylene terephthalate and polyethylene terephthalate is used as a raw material to manufacture a supporting layer with the thickness of 4-15 um;
(2) vacuum plating: at not higher than 10-4Plating the first conducting layer on two sides of the supporting layer manufactured in the step (1) in a Pa vacuum environment in a plating mode;
(3) coating: the conductive paste is prepared by taking conductive particles, a film-forming agent, a solvent and an auxiliary agent as raw materials, wherein when the conductive particles are metal particles, the viscosity of the conductive paste is 10-45 MPa.s, and the solid content is 45-80%; when the conductive particles are nonmetal particles, the viscosity of the conductive slurry is 50-100 MPa.s, and the solid content is 8-15%; attaching the prepared conductive slurry to the first conductive layer in the step (2) in a coating manner, and baking and rolling to form a second conductive layer on the first conductive layer, thereby forming a sample of the composite current collector;
(4) rolling: and (4) rolling the sample formed in the step (3) to obtain the flexible composite current collector.
2. The method for manufacturing the flexible composite current collector as claimed in claim 1, wherein after the step (2) of vacuum plating is completed and before the step (3) of coating is started, the method further comprises the step of punching: and a plurality of rows of connecting holes (4) are formed on the supporting layer and the first conducting layers on two sides in a mechanical punching or laser punching mode, and the aperture of each connecting hole is 50-100 um.
3. The method for manufacturing the flexible composite current collector as claimed in claim 2, wherein the pitch between two adjacent rows of the plurality of rows of connection holes is 100-.
4. The method for manufacturing the flexible composite current collector as claimed in claim 1, wherein in the step (2), the thickness of the first conductive layer is 1-3 um.
5. The manufacturing method of the flexible composite current collector as claimed in claim 1, wherein in the step (3), the thickness of the second conductive layer is 1-5 um.
6. The method for manufacturing the flexible composite current collector as claimed in claim 1, wherein in the step (3), the non-metal particles are one of carbon black, graphite flakes and graphene; the metal particles are high-purity gold particles or high-purity silver particles.
7. The method for manufacturing the flexible composite current collector as claimed in claim 1, wherein in the step (3), the baking temperature is 80-120 ℃ and the baking time is 8-15 h.
8. The manufacturing method of the flexible composite current collector as claimed in claim 1, wherein in the step (4), the rolling temperature is 105-110 ℃.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112151809A (en) * | 2020-10-30 | 2020-12-29 | 蜂巢能源科技有限公司 | Flexible current collector, preparation method thereof and lithium ion battery |
| CN112290027A (en) * | 2020-09-22 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | Lightweight bipolar current collector and bipolar battery |
| CN112909443A (en) * | 2021-03-26 | 2021-06-04 | 厦门海辰新能源科技有限公司 | Tab assembly, preparation method thereof and battery cell |
| CN112952104A (en) * | 2021-03-10 | 2021-06-11 | 浙江南都电源动力股份有限公司 | Novel negative current collector, negative electrode formed by same and lithium ion battery |
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| WO2022100218A1 (en) * | 2020-11-16 | 2022-05-19 | Oppo广东移动通信有限公司 | Current collector, battery and electronic device |
| CN114613932A (en) * | 2022-03-24 | 2022-06-10 | 深圳吉阳智能科技有限公司 | Pole piece structure and battery |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993150A (en) * | 2015-07-04 | 2015-10-21 | 广东烛光新能源科技有限公司 | Flexible device and preparation method thereof |
| CN105762366A (en) * | 2016-05-04 | 2016-07-13 | 江苏深苏电子科技有限公司 | Composite current collector of lithium ion battery and manufacturing method of composite current collector |
| CN106654285A (en) * | 2016-11-18 | 2017-05-10 | 浙江大学 | Flexible current collector for lithium battery and preparation method thereof |
| CN108682788A (en) * | 2018-04-02 | 2018-10-19 | 合肥国轩高科动力能源有限公司 | A kind of flexibility electrode of lithium cell |
| CN109873166A (en) * | 2017-12-05 | 2019-06-11 | 宁德时代新能源科技股份有限公司 | Current collector, pole piece thereof and electrochemical device |
-
2019
- 2019-12-11 CN CN201911267762.7A patent/CN111048787A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993150A (en) * | 2015-07-04 | 2015-10-21 | 广东烛光新能源科技有限公司 | Flexible device and preparation method thereof |
| CN105762366A (en) * | 2016-05-04 | 2016-07-13 | 江苏深苏电子科技有限公司 | Composite current collector of lithium ion battery and manufacturing method of composite current collector |
| CN106654285A (en) * | 2016-11-18 | 2017-05-10 | 浙江大学 | Flexible current collector for lithium battery and preparation method thereof |
| CN109873166A (en) * | 2017-12-05 | 2019-06-11 | 宁德时代新能源科技股份有限公司 | Current collector, pole piece thereof and electrochemical device |
| CN108682788A (en) * | 2018-04-02 | 2018-10-19 | 合肥国轩高科动力能源有限公司 | A kind of flexibility electrode of lithium cell |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290027A (en) * | 2020-09-22 | 2021-01-29 | 合肥国轩高科动力能源有限公司 | Lightweight bipolar current collector and bipolar battery |
| CN112151809B (en) * | 2020-10-30 | 2022-02-22 | 蜂巢能源科技有限公司 | Flexible current collector, preparation method thereof and lithium ion battery |
| CN112151809A (en) * | 2020-10-30 | 2020-12-29 | 蜂巢能源科技有限公司 | Flexible current collector, preparation method thereof and lithium ion battery |
| WO2022100218A1 (en) * | 2020-11-16 | 2022-05-19 | Oppo广东移动通信有限公司 | Current collector, battery and electronic device |
| CN112952104A (en) * | 2021-03-10 | 2021-06-11 | 浙江南都电源动力股份有限公司 | Novel negative current collector, negative electrode formed by same and lithium ion battery |
| CN112909443A (en) * | 2021-03-26 | 2021-06-04 | 厦门海辰新能源科技有限公司 | Tab assembly, preparation method thereof and battery cell |
| CN113097432A (en) * | 2021-03-30 | 2021-07-09 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| WO2022228580A1 (en) * | 2021-04-30 | 2022-11-03 | 珠海冠宇电池股份有限公司 | Electrode plate and preparation method therefor, and lithium-ion battery |
| WO2023051773A1 (en) * | 2021-09-30 | 2023-04-06 | 比亚迪股份有限公司 | Current collector, electrode sheet, and method for preparing current collector |
| CN114613932A (en) * | 2022-03-24 | 2022-06-10 | 深圳吉阳智能科技有限公司 | Pole piece structure and battery |
| CN114613932B (en) * | 2022-03-24 | 2024-04-19 | 深圳吉阳智能科技有限公司 | Pole piece structure and battery |
| CN114784291A (en) * | 2022-05-31 | 2022-07-22 | 宁波鸿翼新材料有限公司 | Flexible current collector with composite structure and preparation method thereof |
| CN114784291B (en) * | 2022-05-31 | 2024-05-14 | 浙江鸿翼新材料有限公司 | Flexible current collector with composite structure and preparation method thereof |
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