Title:
ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2023/082181
Kind Code:
A1
Abstract:
The present application provides an electrochemical device and an electronic device comprising same. The electrochemical device comprises a first electrode sheet, a membrane and a second electrode sheet. The first electrode sheet comprises a first groove and a first tab having one end provided in the first groove. The second electrode sheet comprises a first insulating layer provided opposite to the first tab of the first electrode sheet. The first insulating layer is directly provided on the surface of a second current collector. In the thickness direction of an electrode assembly, the projection area of the first groove is less than that of the first insulating layer, and the projection of the first groove is located in the projection of the first insulating layer. According to the present application, by providing the first insulating layer on the surface of the second current collector, the electron conduction of the second current collector is blocked, and e- cannot be extracted from an active material of a second active material layer to the second current collector, so that the chemical reaction cannot be performed. Therefore, Li+ cannot be extracted from the second electrode sheet to the opposite first electrode sheet, and the exertion of the positive electrode capacity of the second electrode sheet is reduced, thereby effectively reducing lithium precipitation in the groove.
Inventors:
YU SHUXIAN (CN)
MING BANGSHENG (CN)
MING BANGSHENG (CN)
Application Number:
PCT/CN2021/130344
Publication Date:
May 19, 2023
Filing Date:
November 12, 2021
Export Citation:
Assignee:
NINGDE AMPEREX TECHNOLOGY LTD (CN)
International Classes:
H01M10/058; H01M4/64; H01M10/0525
Foreign References:
| CN211507765U | 2020-09-15 | |||
| CN113381058A | 2021-09-10 | |||
| CN203733894U | 2014-07-23 | |||
| CN110729447A | 2020-01-24 | |||
| US20130130065A1 | 2013-05-23 |
Attorney, Agent or Firm:
SHENZHEN SCIENBIZIP INTELLECTUAL PROPERTY AGENCY CO.,LTD. (CN)
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