Title:
NEGATIVE ELECTRODE ACTIVE MATERIAL, MANUFACTURING METHOD, SECONDARY BATTERY, AND ELECTRICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/036485
Kind Code:
A1
Abstract:
The present application relates to a negative electrode active material, which comprises graphite particles having internal pores and a lithium salt coating layer coating the internal pores of the graphite particles and particle outer surfaces, wherein the weight ratio of a lithium element in the internal pores of the graphite particles to a lithium element on the graphite particle outer surfaces is 1-10:1. The present application relates to a manufacturing method for the negative electrode active material, a corresponding secondary battery, and an electrical device. The internal pores and particle surfaces of the negative electrode active material are all coated with lithium salts, so that the negative electrode active material has higher structural stability, thereby effectively improving the first coulombic efficiency and the cycling stability of the corresponding battery.
Inventors:
FENG JINGJIE (CN)
LI XING (CN)
ZHANG CHENCHEN (CN)
WANG PU (CN)
LI XING (CN)
ZHANG CHENCHEN (CN)
WANG PU (CN)
Application Number:
PCT/CN2022/112832
Publication Date:
February 22, 2024
Filing Date:
August 16, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/583; H01M4/587
Foreign References:
| CN113644241A | 2021-11-12 | |||
| JP2004063321A | 2004-02-26 | |||
| JP2008186732A | 2008-08-14 | |||
| EP2913299A1 | 2015-09-02 | |||
| US20200044240A1 | 2020-02-06 |
Attorney, Agent or Firm:
ACIP LAW OFFICES (CN)
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