LITHIUM-ION BATTERY

WIPO Patent Application WO/2022/143188

A1

In order to overcome the problems of ion dissolution and deterioration of battery performance in existing doped or surface-coated positive electrode materials under high temperature conditions, the present invention provides a lithium-ion battery, comprising a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode comprises a positive electrode material layer; the positive electrode material layer comprises a positive electrode active material; the positive electrode active material comprises LiMO2, wherein M is selected from one or more of Ni, Co, and Mn; the positive electrode active material is doped with a compound containing a metal element A and/or the positive electrode active material is coated with the compound containing the metal element A; and the non-aqueous electrolyte comprises a solvent, an electrolyte salt, and a compound represented by structural formula 1. According to the lithium-ion battery provided by the present invention, change of a unit cell of the positive electrode active material in the direction of a c/a axis can be effectively prevented, thereby preventing the collapse of a crystalline structure, and improving the overall stability of the material.

QIAN YUNXIAN (CN)
HU SHIGUANG (CN)
SUN GUIYAN (CN)
LIN XIONGGUI (CN)
DENG YONGHONG (CN)

PCT/CN2021/138672

July 07, 2022

December 16, 2021

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SHENZHEN CAPCHEM TECHNOLOGY CO LTD (CN)

H01M4/485; H01M4/36; H01M4/505; H01M4/525; H01M4/62; H01M10/0525; H01M10/0567

CN104718658A	2015-06-17
CN110504415A	2019-11-26
CN105655642A	2016-06-08
CN108933294A	2018-12-04
US20170084951A1	2017-03-23

SHENZHEN ZHONGDING INTELLECTUAL PROPERTY AGENCY (CN)

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