TERNARY POSITIVE ELECTRODE MATERIAL FOR LITHIUM-ION BATTERY AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2023/165626

A1

Disclosed in the present invention is a ternary positive electrode material for a lithium-ion battery. The ternary positive electrode material has a coated structure; an inner core comprises a lithium composite metal oxide, and an outer coating layer is in a wrinkled shape; the wrinkle-shaped outer coating layer coats the surface of the lithium composite metal oxide; and the outer coating layer is mainly a cobalt-containing lithium metal oxide. The positive electrode material is prepared by mixing a lithium source and a ternary precursor material at a molar ratio, subjecting the resulting mixture to multi-stage high-temperature sintering in an oxygen atmosphere, cooling same to room temperature, mixing the resulting lithium composite metal oxide with a cobalt source, or with a cobalt source and a compound of an M element, and sintering same in an oxygen atmosphere, so as to obtain a ternary positive electrode material. The product of the present invention can significantly reduce a residual lithium compound on a surface of a high-nickel material, effectively improve the specific capacity and cycle life of the material, and also significantly reduce the DCR of the material.

FENG XIN (CN)
ZHAO XUEMIN (CN)
LUO GUI (CN)
HUANG MIN (CN)
TANG BO (CN)
LI YAN (CN)
TAN XINXIN (CN)
LI XU (CN)

PCT/CN2023/082662

September 07, 2023

March 21, 2023

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BASF SHANSHAN BATTERY MAT CO LTD (CN)

H01M4/36

CN110474026A	2019-11-19
CN104934571A	2015-09-23
CN108550830A	2018-09-18
CN110247031A	2019-09-17
CN113363492A	2021-09-07
US5798190A	1998-08-25

CHANGSHA ZONEYOUNG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)

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