Btr New Material Group Co., Ltd.

Chengkun Zhou

Dongdong Li

Haihui Zhou

Jianguo Ren

Min Yue

Youyuan Huang

Xuan Wu

Xingyang Liu

Provided are a natural graphite, a modified natural graphite material prepared therefrom, a preparation method, and applications. The natural graphite has the following characteristics: a particle size D50 smaller than 10 μm, and D90/D10<2.5; a 002 interplanar spacing ranging from 0.336 to 0.360 nm, I/I≤35; a saturated tap density greater than or equal to 0.6 g/cc and smaller than 1.3 g/cc; and a specific surface area greater than or equal to 1.0 m/g and smaller than 10.0 m/g. The provided natural graphite has specific particle size, orientation, tap density and surface area and can serve as a raw material for preparing modified natural graphite material, and the prepared modified natural graphite material has high isotropy and thus has better rate performance and cycle performance.

Natural graphite, modified natural graphite material prepared therefrom, preparation method, and applications

A natural graphite-based modified composite material, a preparation method therefor, and a lithium ion battery comprising the modified composite material. The natural graphite-based modified composite material comprises natural graphite and non-graphitized carbon coated on the inner and outer surfaces of the natural graphite. The preparation method comprises: (1) subjecting spherical natural graphite to isotropic treatment; (2) performing granularity control and shaping treatment; (3) subjecting the inner surface and the outer surface of the material obtained in step (2) to simultaneous modification; and (4) performing carbonization, so as to obtain a natural graphite-based modified composite material.

Natural graphite-based modified composite material, preparation method therefor, and lithium ion battery comprising modified composite material

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Guangdong, China

Chengkun Zhou