Title:
ELECTRODE SHEET, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/065726
Kind Code:
A1
Abstract:
The present application provides an electrode sheet, a battery cell, a battery, and an electric device. The electrode sheet comprises: a current collector, comprising a tab area, a thinning area, and a non-thinning area, and the thinning area being located between the non-thinning area and the tab area; and a film layer, provided on the thinning area and the non-thinning area. The film layer comprises a first active material arranged on the thinning area and a second active material arranged on the non-thinning area, the thickness of the film layer of the thinning area is smaller than that of the film layer of the non-thinning area, and the specific surface area of the first active material is larger than that of the second active material. A lithium precipitation phenomenon can be obviously improved in the thinning area of the electrode sheet, so that the polarization of the electrode sheet in a battery cycle process is reduced, the cycle performance of the battery is improved, and the service life of the battery is prolonged.
Inventors:
DU XIANGLONG (CN)
Application Number:
PCT/CN2022/123380
Publication Date:
April 04, 2024
Filing Date:
September 30, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/13; H01M4/36
Foreign References:
| CN114665064A | 2022-06-24 | |||
| CN109980177A | 2019-07-05 | |||
| CN111816838A | 2020-10-23 | |||
| JP2017059297A | 2017-03-23 |
Attorney, Agent or Firm:
LONGSUN LEAD IP LTD. (CN)
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