Btr New Material Group Co., Ltd.

Dingyuan New Energy Technology Co., Ltd.

Yiming Kong

Jianguo Ren

Chunlei Pang

Xueqin He

Tengyu Liang

Provided are a composite negative electrode material, a preparation method therefor and a lithium battery. The composite negative electrode material comprises silicon-containing particles and a carbon coating layer coating at least part of the surface of silicon-containing particles. In Raman spectrum, the composite negative electrode material has a silicon characteristic peak A between 450 cm-550 cm, a carbon characteristic peak B between 1300 cm-1400 cm, a carbon characteristic peak C between 1530 cm-1630 cm, and a graphene structure characteristic peak D between 2500 cm-2750 cm. The preparation method comprises: in protective atmosphere, introducing reaction gas to react with silicon-containing particles, the reaction temperature being 700° C.-1450° C., and the reaction gas comprising a carbon-containing gas, so that at least part of the surface of silicon-containing particles form a carbon coating layer, so as to obtain the composite negative electrode material.

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Guangdong, China

Yiming Kong