Title:
COMPOSITE CURRENT COLLECTOR AND MANUFACTURING METHOD THEREFOR, ELECTRODE SHEET, SECONDARY BATTERY AND ELECTRIC APPARATUS
Document Type and Number:
WIPO Patent Application WO/2024/060176
Kind Code:
A1
Abstract:
The present application relates to a composite current collector and a manufacturing method therefor, an electrode sheet, a secondary battery, and an electric apparatus. The composite current collector comprises a metal foil, the metal foil comprises a first surface and a second surface which are opposite in position, the first surface is provided with a first conductive polymer layer, the second surface is provided with a second conductive polymer layer, and the first conductive polymer layer and the second conductive polymer layer are made of the same or different material, and both comprise a polymer material and a conductive agent. The composite current collector effectively improves the tensile strength of a current collector, solves the problem that the metal foil is broken in the production process of a lithium ion battery, and facilitates the thinning of the metal foil or the use of a thinner metal foil to improve the energy density of the electrode sheet. In addition, the presence of conductive polymer layers can isolate an electrolyte and reduce or avoid the corrosion of the metal foil by the electrolyte.
Inventors:
ZHENG YI (CN)
SUN CHENGDONG (CN)
LIU YIXIU (CN)
SUN CHENGDONG (CN)
LIU YIXIU (CN)
Application Number:
PCT/CN2022/120745
Publication Date:
March 28, 2024
Filing Date:
September 23, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/04; H01M4/66
Foreign References:
| CN110718674A | 2020-01-21 | |||
| CN103985877A | 2014-08-13 | |||
| CN110556511A | 2019-12-10 | |||
| CN110943215A | 2020-03-31 |
Attorney, Agent or Firm:
ACIP LAW OFFICES (CN)
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