Title:
COMPOSITE CURRENT COLLECTOR AND PREPARATION METHOD THEREFOR, AND ELECTRODE PLATE AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/206687
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 polymer base membrane, and aluminum-plated layers, which are arranged on the surfaces of two sides of the polymer base membrane, wherein the aluminum-plated layer comprises a first sub-layer and a second sub-layer; the first sub-layer is closer to the polymer base membrane than the second sub-layer; and the particle size of aluminum particles in the first sub-layer is 10 nm to 30 nm, and the particle size of aluminum particles in the second sub-layer is 80 nm to 100 nm. The composite current collector not only has relatively high conductivity, but also has relatively high surface energy; and during a coating process of an active substance, the interface internal resistance between a battery electrode plate and a current collector can be significantly improved, thereby improving the capacity and cycling performance of a lithium battery.
Inventors:
WANG CHENGHAO (CN)
LI XUEFA (CN)
ZHANG GUOPING (CN)
LI XUEFA (CN)
ZHANG GUOPING (CN)
Application Number:
PCT/CN2022/095406
Publication Date:
November 02, 2023
Filing Date:
May 27, 2022
Export Citation:
Assignee:
JIANGYIN NANOPORE INNOVATIVE MATERIALS TECH LTD (CN)
International Classes:
H01M4/64; H01M4/134; H01M4/1395; H01M4/66
Foreign References:
| CN108531876A | 2018-09-14 | |||
| JP2002170571A | 2002-06-14 | |||
| CN114361461A | 2022-04-15 | |||
| CN108777308A | 2018-11-09 | |||
| CN110943228A | 2020-03-31 | |||
| JP2012079821A | 2012-04-19 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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