NEGATIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREFOR, AND LITHIUM ION BATTERY

WIPO Patent Application WO/2023/124871

A1

The present application relates to a negative electrode material, a preparation method therefor, and a use thereof. The negative electrode material comprises an active substance, a buffer layer located on a surface of the active substance, and a carbon layer, the buffer layer being formed on the surface of the active substance, and the carbon layer comprising an amorphous carbon material located on a surface of the buffer layer and a carbon nanomaterial extending towards and/or away from the buffer layer. In the particle structure of the negative electrode material, the buffer layer has a particular degree of toughness, which can effectively buffer volume expansion of the negative electrode material, and in addition, extension of the carbon nanomaterial also provides a particular buffering effect, which can further buffer the volume expansion of the negative electrode material, so that stress among particles of the negative electrode material during a charging or discharging process is reduced, thereby improving structural stability of the negative electrode material and further improving a cycling capacity retention rate of a battery.

CHEN XI (CN)
PANG CHUNLEI (CN)
LIANG TENGYU (CN)
REN JIANGUO (CN)
HE XUEQIN (CN)

PCT/CN2022/137453

July 06, 2023

December 08, 2022

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BTR NEW MAT GROUP CO LTD (CN)
DINGYUAN NEW ENERGY TECH CO LTD (CN)

H01M4/38; H01M4/583; H01M10/0525

CN112374482A	2021-02-19
CN110148722A	2019-08-20
CN103199252A	2013-07-10
CN1673073A	2005-09-28
JP2008004460A	2008-01-10

UNI-INTEL PATENT AND TRADEMARK LAW FIRM (CN)

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