Title:
SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/104038
Kind Code:
A1
Abstract:
In order to overcome the problem of an insufficient high-temperature performance of existing secondary batteries, the present invention provides a secondary battery. The secondary battery comprises a positive electrode, a negative electrode and a non-aqueous electrolyte, wherein the positive electrode comprises a positive electrode material layer, the positive electrode material layer comprises a positive electrode active material, and the positive electrode active material comprises a cobalt-containing compound; the negative electrode comprises a negative electrode material layer; and the non-aqueous electrolyte comprises a solvent, an electrolyte salt and a compound as represented by structural formula 1, wherein R1 is selected from an unsaturated hydrocarbyl group having 3-6 carbon atoms, R2 is selected from an alkylene group having 2-5 carbon atoms, and n = 1 or 2. The secondary battery satisfies the condition (aa). The secondary battery provided in the present invention effectively reduces the damage, to a highly compacted negative electrode, of Co ions dissolved out from the cobalt-containing compound during a cycling process of the battery, reduces the capacity loss of the secondary battery during high-temperature cycling, and improves the high-temperature cycling performance of the secondary battery.
Inventors:
QIAN YUNXIAN (CN)
LIU ZHONGBO (CN)
DENG YONGHONG (CN)
WANG YONG (CN)
HUANG XIONG (CN)
LIU ZHONGBO (CN)
DENG YONGHONG (CN)
WANG YONG (CN)
HUANG XIONG (CN)
Application Number:
PCT/CN2022/136962
Publication Date:
June 15, 2023
Filing Date:
December 06, 2022
Export Citation:
Assignee:
SHENZHEN CAPCHEM TECHNOLOGY CO LTD (CN)
International Classes:
H01M10/0525; H01M4/13; H01M4/525
Foreign References:
| CN114373980A | 2022-04-19 | |||
| JP2018163867A | 2018-10-18 | |||
| JP2019192639A | 2019-10-31 | |||
| CN111129586A | 2020-05-08 | |||
| CN111129588A | 2020-05-08 | |||
| CN112635823A | 2021-04-09 | |||
| CN112242563A | 2021-01-19 |
Attorney, Agent or Firm:
SHENZHEN ZHONGDING INTELLECTUAL PROPERTY AGENCY (CN)
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