Title:
POSITIVE ELECTRODE SHEET AND PREPARATION METHOD THEREFOR, SECONDARY BATTERY, AND ELECTRIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/092501
Kind Code:
A1
Abstract:
A positive electrode sheet and a preparation method therefor, a secondary battery, and an electric device. The positive electrode sheet comprises a positive electrode current collector and a positive electrode film layer disposed on at least one side of the positive electrode current collector. The positive electrode film layer comprises a positive electrode active material and a silicon-compound-containing additive as represented by formula mMxQ·nSiyQz, wherein M is one or more of an alkali metal, an alkaline earth metal, Al, Fe and Zn; Q is one or more of O, F, Cl, Br, I and At; the value of x depends on M; the values of y and z depend on Q; m and n are positive integers; and the silicon-compound-containing additive comprises small particles with an average volume particle size Dv50 of 0.01-1 um. The silicon-compound-containing additive with a specific particle size in the positive electrode film layer of the positive electrode sheet can significantly reduce the direct-current internal resistance of a corresponding secondary battery and improve the cycling performance of the battery.
Inventors:
XIE TINGZHEN (CN)
XU BAOYUN (CN)
OUYANG SHAOCONG (CN)
FU CHENGHUA (CN)
LIN YUNMEI (CN)
XU BAOYUN (CN)
OUYANG SHAOCONG (CN)
FU CHENGHUA (CN)
LIN YUNMEI (CN)
Application Number:
PCT/CN2022/128964
Publication Date:
May 10, 2024
Filing Date:
November 01, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/62; H01M4/13; H01M10/0525
Foreign References:
| JP2017228435A | 2017-12-28 | |||
| CN108780889A | 2018-11-09 | |||
| JP2013073832A | 2013-04-22 | |||
| CN111162247A | 2020-05-15 | |||
| JP2018110065A | 2018-07-12 |
Attorney, Agent or Firm:
ACIP LAW OFFICES (CN)
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