Title:
NEGATIVE ELECTRODE ACTIVE MATERIAL AND PREPARATION METHOD THEREFOR, AND SECONDARY BATTERY AND ELECTRICAL DEVICE CONTAINING NEGATIVE ELECTRODE ACTIVE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2024/077607
Kind Code:
A1
Abstract:
The present application provides a negative electrode active material and a preparation method therefor, and a secondary battery and an electrical device containing the negative electrode active material. The negative electrode active material comprises a carbon matrix and a filler material; the degree of graphitization of the carbon matrix is less than or equal to 87%; the carbon matrix comprises a plurality of pore structures; at least part of the filler material is located in the pore structures of the carbon matrix; and the filler material comprises one or more elements that can undergo an alloying reaction with Li. The negative electrode active material provided by the present application have high specific capacity, high initial Coulombic efficiency, low volume expansion, high conductivity, and good cycle stability.
Inventors:
WU KAI (CN)
WANG JIAZHENG (CN)
LV ZIJIAN (CN)
DONG XIAOBIN (CN)
WANG JIAZHENG (CN)
LV ZIJIAN (CN)
DONG XIAOBIN (CN)
Application Number:
PCT/CN2022/125432
Publication Date:
April 18, 2024
Filing Date:
October 14, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/36; H01M4/38
Foreign References:
| CN109301225A | 2019-02-01 | |||
| CN114127985A | 2022-03-01 | |||
| CN104269521A | 2015-01-07 | |||
| CN114759157A | 2022-07-15 | |||
| CN114520313A | 2022-05-20 | |||
| US5888430A | 1999-03-30 |
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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