Title:
POSITIVE ELECTRODE ACTIVE MATERIAL AND PREPARATION METHOD THEREFOR, AND POSITIVE ELECTRODE SHEET, SECONDARY BATTERY AND ELECTRIC DEVICE COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2024/065150
Kind Code:
A1
Abstract:
The present application provides a positive electrode active material and a preparation method therefor, and a positive electrode sheet, a secondary battery and an electric device comprising same. The positive electrode active material comprises a core and a shell covering the core; the core comprises LimAxMn1-yByP1-
zCzO4-nDn; the shell comprises crystalline pyrophosphate LiaMP2O7 and/or Mb(P2O7)c, crystalline phosphate XPO4, crystalline borate YpBqOr and carbon, and the shell comprises one or more coatings; and each coating independently comprises one or more of crystalline pyrophosphate LiaMP2O7 and/or Mb(P2O7)c, crystalline phosphate XPO4, crystalline borate YpBqOr and carbon. The positive electrode active material of the present application can enable the secondary battery to have a relatively high energy density, and also have improved cycle performance, safety performance and/or rate performance.
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Inventors:
YUAN TIANCI (CN)
JIANG YAO (CN)
ZHANG XINXIN (CN)
OUYANG CHUYING (CN)
KANG WEIBIN (CN)
WU LINGJING (CN)
CHEN SHANGDONG (CN)
JIANG YAO (CN)
ZHANG XINXIN (CN)
OUYANG CHUYING (CN)
KANG WEIBIN (CN)
WU LINGJING (CN)
CHEN SHANGDONG (CN)
Application Number:
PCT/CN2022/121562
Publication Date:
April 04, 2024
Filing Date:
September 27, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/58
Foreign References:
| CN104577115A | 2015-04-29 | |||
| CN114256448A | 2022-03-29 | |||
| CN112864385A | 2021-05-28 | |||
| CN101339994A | 2009-01-07 | |||
| CN109616655A | 2019-04-12 |
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
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