Title:
NEGATIVE ELECTRODE SHEET, SECONDARY BATTERY, AND ELECTRICAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/040858
Kind Code:
A1
Abstract:
Disclosed in the present invention are a negative electrode sheet, a secondary battery, and an electrical device. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active layer provided on at least one side of the negative electrode current collector, and the negative electrode active layer comprises a first active layer and a second active layer; the first active layer is located between the second active layer and the negative electrode current collector; the first active layer comprises a first negative electrode active material, and the second active layer comprises a second negative electrode active material; the interplanar spacing d1 of (002) crystal planes of the first negative electrode active material is greater than the interplanar spacing d2 of (002) crystal planes of the second negative electrode active material. According to the present invention, by defining that the interplanar spacing d1 of (002) crystal planes of the first negative electrode active material is greater than the interplanar spacing d2 of (002) crystal planes of the second negative electrode active material, the negative electrode sheet can improve the initial coulombic efficiency of secondary batteries and keep a relatively high battery capacity.
Inventors:
JU XIAOKANG (CN)
HU MENG (CN)
ZHANG YAO (CN)
HU MENG (CN)
ZHANG YAO (CN)
Application Number:
PCT/CN2023/071003
Publication Date:
February 29, 2024
Filing Date:
January 06, 2023
Export Citation:
Assignee:
SUNWODA MOBILITY ENERGY TECH CO LTD (CN)
International Classes:
H01M4/133
Foreign References:
| CN115472777A | 2022-12-13 | |||
| CN103633293A | 2014-03-12 | |||
| CN101159324A | 2008-04-09 | |||
| CN114735672A | 2022-07-12 | |||
| JP2013137907A | 2013-07-11 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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