Title:
POSITIVE ELECTRODE ACTIVE MATERIAL HAVING CORE-SHELL STRUCTURE AND PREPARATION METHOD THEREFOR, POSITIVE ELECTRODE SHEET, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND ELECTRICAL APPARATUS
Document Type and Number:
WIPO Patent Application WO/2023/245345
Kind Code:
A1
Abstract:
The present application provides a positive electrode active material and a preparation method therefor, a positive electrode sheet, a secondary battery, a battery module, a battery pack, and an electrical apparatus. The positive electrode active material comprises a core containing LimAxMn1- yByP1-zCzO4-nDn, a first coating layer containing crystalline pyrophosphates LiaMP2O7 and/or Mb(P2O7)c and coating the core, a second coating layer containing an oxide M'dOe and coating the first coating layer, and a carbon-containing third coating layer coating the second coating layer. The positive electrode active material of the present application can reduce the generation of Li/Mn antisite defects, reduce manganese dissolution, reduce a lattice change rate, increase the capacity of a secondary battery, and improve the cycle performance, high-temperature storage performance and safety performance of the secondary battery.
Inventors:
JIANG YAO (CN)
OUYANG CHUYING (CN)
ZHANG XINXIN (CN)
XU BO (CN)
DENG BIN (CN)
WANG ZHIQIANG (CN)
YUAN TIANCI (CN)
CHEN SHANGDONG (CN)
OUYANG CHUYING (CN)
ZHANG XINXIN (CN)
XU BO (CN)
DENG BIN (CN)
WANG ZHIQIANG (CN)
YUAN TIANCI (CN)
CHEN SHANGDONG (CN)
Application Number:
PCT/CN2022/099868
Publication Date:
December 28, 2023
Filing Date:
June 20, 2022
Export Citation:
Assignee:
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)
International Classes:
H01M4/58; H01M4/36; H01M10/0525; H01M10/058
Foreign References:
| CN104577115A | 2015-04-29 | |||
| CN114256448A | 2022-03-29 | |||
| US20090117020A1 | 2009-05-07 | |||
| JP2018116856A | 2018-07-26 | |||
| GB245332009TA |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (CN)
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