HIGH-NICKEL LITHIUM NICKEL MANGANESE COBALT TERNARY POSITIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR

WIPO Patent Application WO/2023/050763

A1

The present invention provides a high-nickel lithium nickel manganese cobalt ternary positive electrode material and a preparation method therefor. The preparation method comprises the following steps: mixing NixCoyMnz(OH)2, lithium hydroxide, and a transition metal nano oxide, and then performing primary calcination on the mixture to obtain a matrix material, wherein x≥0.8, and x+y+z=1; and mixing cobalt phosphate, a zirconium source, and the matrix material, and then performing secondary calcination on the mixture to obtain a high-nickel lithium nickel manganese cobalt ternary positive electrode material. Based on this, the positive electrode material of the present invention has better electrochemical performance, and the problem in the prior art of poor electrochemical performance of a battery caused by poor structural stability and poor chemical stability of the high-nickel ternary positive electrode material, and incapability of effectively controlling an SEI layer formed on the surface of the high-nickel ternary positive electrode material in the battery circulation process is effectively solved.

MA JIALI (CN)
ZHANG SHUTAO (CN)
LI ZITAN (CN)
JIANG WEIJUN (CN)
WANG ZHUANG (CN)
WANG YAZHOU (CN)
BAI YAN (CN)
YANG HONGXIN (CN)

PCT/CN2022/085905

April 06, 2023

April 08, 2022

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SVOLT ENERGY TECH CO LTD (CN)

H01M4/505; H01M4/525

CN113871613A	2021-12-31
CN110176583A	2019-08-27
CN108206280A	2018-06-26
CN109713251A	2019-05-03
CN112768643A	2021-05-07
US20180145332A1	2018-05-24
CN112289994A	2021-01-29

KANGXIN PARTNERS, P.C. (CN)

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