Title:
ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/115563
Kind Code:
A1
Abstract:
The present application provides an electrochemical device and an electronic device. The electrochemical device comprises a negative electrode plate, wherein the negative electrode plate comprises a negative electrode active material layer, and the negative electrode active material layer comprises silicon-based material particles and a binder. The negative electrode plate satisfies: (B+C)/7 < A < (B+C)/1.8, wherein A represents the weight loss rate of the negative electrode active material layer of the negative electrode plate when the negative electrode active material layer is heated to 480ºC in an Ar atmosphere and with the mass percentage as the unit; B represents the relative percentage content fluctuation value of silicon in the silicon-based material particles; and C represents the content of silicon in the negative electrode plate with the mass percentage as the unit. The negative electrode plate satisfies (B+C)/7 < A < (B+C)/1.8, such that the cycle performance, rate capability and expansion performance of the electrochemical device can be significantly improved.
Inventors:
LIAO QUNCHAO (CN)
Application Number:
PCT/CN2021/141317
Publication Date:
June 29, 2023
Filing Date:
December 24, 2021
Export Citation:
Assignee:
NINGDE AMPEREX TECHNOLOGY LTD (CN)
International Classes:
H01M4/134
Domestic Patent References:
| WO2021057929A1 | 2021-04-01 | |||
| WO2020256395A2 | 2020-12-24 |
Foreign References:
| CN113711385A | 2021-11-26 | |||
| CN113258052A | 2021-08-13 | |||
| CN107785541A | 2018-03-09 | |||
| CN108550837A | 2018-09-18 |
Attorney, Agent or Firm:
EAST & CONCORD PARTNERS et al. (CN)
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