Title:
COMPOSITE CURRENT COLLECTOR AND PREPARATION METHOD THEREFOR, AND ELECTRODE PLATE AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/206688
Kind Code:
A1
Abstract:
The present invention relates to a composite current collector and a preparation method therefor, and an electrode plate and a secondary battery. The composite current collector comprises: a porous polymer film and aluminum-plated layers, which are arranged on surfaces of two sides of the porous polymer film, wherein the pore diameter D50 of the porous polymer film is less than or equal to 60 nm, and the porosity thereof is less than 80%. In the process of manufacturing a lithium battery, after the composite current collector is subjected to a rolling process, cases of electrode plate breakage are significantly reduced, and the unit weight of the composite current collector is reduced, thereby significantly improving the energy density of the battery.
Inventors:
WANG CHENGHAO (CN)
LI XUEFA (CN)
ZHANG GUOPING (CN)
LI XUEFA (CN)
ZHANG GUOPING (CN)
Application Number:
PCT/CN2022/095412
Publication Date:
November 02, 2023
Filing Date:
May 27, 2022
Export Citation:
Assignee:
JIANGYIN NANOPORE INNOVATIVE MATERIALS TECH LTD (CN)
International Classes:
H01M4/66; H01M4/13; H01M4/80; H01M10/05
Foreign References:
| CN111883778A | 2020-11-03 | |||
| CN110380058A | 2019-10-25 | |||
| CN206849946U | 2018-01-05 | |||
| CN214254470U | 2021-09-21 | |||
| US20200313155A1 | 2020-10-01 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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