Title:
NEGATIVE ELECTRODE SHEET, ELECTROCHEMICAL DEVICE COMPRISING NEGATIVE ELECTRODE SHEET, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/140982
Kind Code:
A1
Abstract:
The present application provides a negative electrode sheet, an electrochemical device comprising the negative electrode sheet, and an electronic device. As a negative electrode material layer of the negative electrode sheet contains silicon-based particles and graphite particles, pores are produced in the silicon-based particles, so that the porosity of the silicon-based particles α1 and the silicon content B in the silicon-based particles satisfy P = 0.5 α1/(B-α1B), 0.2 ≤ P ≤ 1.6, and thus lithium intercalation expansion of the silicon-based particles can be effectively alleviated, thereby improving the cycle performance and solving the problem of expansion deformation of the electrochemical device.
Inventors:
LIAO QUNCHAO (CN)
Application Number:
PCT/CN2020/140378
Publication Date:
July 07, 2022
Filing Date:
December 28, 2020
Export Citation:
Assignee:
NINGDE AMPEREX TECHNOLOGY LTD (CN)
International Classes:
H01M4/134; H01M4/38
Foreign References:
| CN107204431A | 2017-09-26 | |||
| CN108199023A | 2018-06-22 | |||
| CN109273680A | 2019-01-25 | |||
| CN106876665A | 2017-06-20 | |||
| US20160118655A1 | 2016-04-28 |
Other References:
See also references of EP 4050676A4
Attorney, Agent or Firm:
PATENTSINO IP FIRM (CN)
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