POSITIVE ELECTRODE ACTIVE MATERIAL, POSITIVE ELECTRODE SHEET, SECONDARY BATTERY, BATTERY MODULE, BATTERY PACK, AND ELECTRIC DEVICE

WIPO Patent Application WO/2023/082182

A1

Provided in the present application is a positive electrode active material with a core-shell structure, which material comprises an inner core and a shell coating the inner core, wherein the inner core comprises Li1+xMn1-yAyP1-zRzO4, in which x = -0.100 to 0.100, y = 0.001 to 0.500, z = 0.001 to 0.100, A is selected from one or more of Zn, Al, Na, K, Mg, Mo, W, Ti, V, Zr, Fe, Ni, Co, Ga, Sn, Sb, Nb and Ge, and is optionally one or more of Fe, Ti, V, Ni, Co and Mg, and R is selected from one or more of B, Si, N and S; and the shell comprises a first coating layer coating the inner core and a second coating layer coating the first coating layer, wherein the first coating layer comprises a pyrophosphate MP2O7 and a phosphate XPO4, in which M and X are each independently selected from one or more of Li, Fe, Ni, Mg, Co, Cu, Zn, Ti, Ag, Zr, Nb or Al, and the second coating layer contains carbon.

JIANG YAO (CN)
OUYANG CHUYING (CN)
ZHANG XINXIN (CN)
DENG BIN (CN)
ZHAO XUSHAN (CN)
WANG ZHIQIANG (CN)
YUAN TIANCI (CN)
LIU SHAOJUN (CN)
CHEN SHANGDONG (CN)
XU BO (CN)

PCT/CN2021/130350

May 19, 2023

November 12, 2021

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CONTEMPORARY AMPEREX TECHNOLOGY CO LTD (CN)

H01M4/36

CN110416525A	2019-11-05
CN109888201A	2019-06-14
CN101339994A	2009-01-07
CN112635722A	2021-04-09
CN106058225A	2016-10-26
US20170365859A1	2017-12-21

PEKSUNG INTELLECTUAL PROPERTY LTD. (CN)

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