Title:
ELECTRODE SHEET, ELECTRODE ASSEMBLY, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/021025
Kind Code:
A1
Abstract:
Embodiments of the present application provide an electrode sheet, an electrode assembly, a battery cell, a battery, and an electric device. The electrode sheet comprises: a current collector, which comprises a tab, a first area, and a second area that are sequentially arranged in a first direction; and an expansion member provided in at least part of the first area adjacent to the second area, the expansion member being configured to expand after being infiltrated by an electrolyte, wherein the first area and the second area are coated with an active substance layer, the thickness of the active substance layer corresponding to the first area is less than the thickness of the active substance layer corresponding to the second area, and the expansion member is provided between the active substance layer and the first area. By means of the technical solution provided by the present application, lithium precipitation of the electrode sheet during long cycles can be inhibited, so that the cycle performance of the battery is improved.
Inventors:
DU XIANGLONG (CN)
Application Number:
PCT/CN2022/108992
Publication Date:
February 01, 2024
Filing Date:
July 29, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/13; H01M4/66; H01M10/0525
Foreign References:
| CN113140697A | 2021-07-20 | |||
| CN114447408A | 2022-05-06 | |||
| CN109841794A | 2019-06-04 | |||
| CN113330601A | 2021-08-31 | |||
| CN215299297U | 2021-12-24 | |||
| CN212934696U | 2021-04-09 | |||
| JP2000285923A | 2000-10-13 | |||
| CN113629357A | 2021-11-09 | |||
| CN111952518A | 2020-11-17 |
Attorney, Agent or Firm:
LONGSUN LEAD IP LTD. (CN)
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