Title:
POSITIVE ELECTRODE ACTIVE MATERIAL AND PREPARATION METHOD THEREFOR, POSITIVE ELECTRODE SHEET, SECONDARY BATTERY, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/041531
Kind Code:
A1
Abstract:
A positive electrode active material and a preparation method therefor, a positive electrode sheet, a secondary battery, and an electronic device. The positive electrode active material comprises: a fluorine-doped ternary positive electrode material matrix; and a coating structure covering at least part of the surface of the fluorine-doped ternary positive electrode material matrix, wherein the coating structure comprises an aluminum-rich inner coating layer close to the surface of the fluorine-doped ternary positive electrode material matrix and a titanium-rich outer coating layer distant from the surface of the fluorine-doped ternary positive electrode material matrix. The positive electrode active material can improve the structural stability and cycle performance of the secondary battery.
Inventors:
CHEN DEXIAN (CN)
WANG HUIMIN (CN)
LI QI (CN)
LV FEI (CN)
XU NING (CN)
WANG HUIMIN (CN)
LI QI (CN)
LV FEI (CN)
XU NING (CN)
Application Number:
PCT/CN2023/114239
Publication Date:
February 29, 2024
Filing Date:
August 22, 2023
Export Citation:
Assignee:
TIANJIN B&M SCIENCE AND TECH CO LTD (CN)
International Classes:
H01M4/62
Foreign References:
| CN115440981A | 2022-12-06 | |||
| CN109860574A | 2019-06-07 | |||
| US20180183045A1 | 2018-06-28 | |||
| US20200006766A1 | 2020-01-02 | |||
| CN108847477A | 2018-11-20 | |||
| CN114242976A | 2022-03-25 | |||
| CN107170968A | 2017-09-15 | |||
| CN112010306A | 2020-12-01 |
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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