Title:
PREPARATION METHOD FOR COMPOSITE CURRENT COLLECTOR, AND COMPOSITE CURRENT COLLECTOR
Document Type and Number:
WIPO Patent Application WO/2024/000803
Kind Code:
A1
Abstract:
The present invention relates to a preparation method for a composite current collector, and a composite current collector. The preparation method for a composite current collector comprises the following steps: ionizing metal nickel to generate nickel ions; and under the action of a magnetic field, bombarding the two oppositely disposed surfaces of a thin film substrate layer with the nickel ions at a high speed, so as to form metal nickel layers on the two oppositely disposed surfaces of the thin film substrate layer. In the present invention, the nickel ions are used for bombarding the surfaces of the thin film substrate layer at a high speed, such that the nickel ions can be bonded to negatively charged polar groups on the surfaces of the thin film substrate layer to generate chemical bonds; and by arranging the metal nickel layers between a metal coating and the thin film substrate layer, the binding force and the stripping force between the metal coating and the thin film substrate layer can be improved, such that the metal coating and the thin film substrate layer are not prone to falling off, thereby ensuring the electrical properties and safety of a battery, and moreover the problems of defective products due to liability to layering during a slitting process and serious product defects caused by the phenomena of material falling during a sheet preparation process can be solved.
Inventors:
WANG CHENGHAO (CN)
LI XUEFA (CN)
ZHANG GUOPING (CN)
LI XUEFA (CN)
ZHANG GUOPING (CN)
Application Number:
PCT/CN2022/116777
Publication Date:
January 04, 2024
Filing Date:
September 02, 2022
Export Citation:
Assignee:
YANGZHOU NANOPORE INNOVATIVE MATERIALS TECH LTD (CN)
International Classes:
H01M4/66; C23C14/20; C23C14/24; H01M4/64
Foreign References:
| CN106981665A | 2017-07-25 | |||
| CN111748764A | 2020-10-09 | |||
| CN114015994A | 2022-02-08 | |||
| CN113745525A | 2021-12-03 | |||
| JP2010218971A | 2010-09-30 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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