Title:
COMPOSITE NEGATIVE ELECTRODE ACTIVE MATERIAL AND PREPARATION METHOD THEREFOR, NEGATIVE ELECTRODE SHEET, SECONDARY BATTERY AND ELECTRIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/087081
Kind Code:
A1
Abstract:
A composite negative electrode active material and a preparation method therefor, a negative electrode sheet, a secondary battery and an electric device. The composite negative electrode active material comprises silicon-based negative electrode active material particles and a coating layer, which coats at least part of the surfaces of the silicon-based negative electrode active material particles, wherein the coating layer comprises a cross-linked polymer. The composite negative electrode active material is applied to a secondary battery and can make the secondary battery have good cycle performance and high energy density.
Inventors:
ZHUANG ZAIYU (CN)
ZHANG MING (CN)
YANG JIMIN (CN)
ZHANG MING (CN)
YANG JIMIN (CN)
Application Number:
PCT/CN2022/127837
Publication Date:
May 02, 2024
Filing Date:
October 27, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/36; H01M4/62
Foreign References:
| CN112956051A | 2021-06-11 | |||
| CN109301184A | 2019-02-01 | |||
| CN112420998A | 2021-02-26 | |||
| CN108054368A | 2018-05-18 | |||
| JP2020009751A | 2020-01-16 |
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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