US 12,463,204 B2
Negative electrode material and preparation method therefor, and lithium-ion battery
Haihui Zhou, Guangdong (CN); Junhui Lai, Guangdong (CN); Tao Xu, Guangdong (CN); Jianguo Ren, Guangdong (CN); and Xueqin He, Guangdong (CN)
Assigned to BTR NEW MATERIAL GROUP CO., LTD., Guangdong (CN)
Appl. No. 17/623,303
Filed by BTR NEW MATERIAL GROUP CO., LTD., Guangdong (CN)
PCT Filed May 27, 2021, PCT No. PCT/CN2021/096485
§ 371(c)(1), (2) Date Dec. 28, 2021,
PCT Pub. No. WO2021/239063, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 202010470772.7 (CN), filed on May 28, 2020.
Prior Publication US 2022/0367857 A1, Nov. 17, 2022
Int. Cl. H01M 4/36 (2006.01); C01B 32/21 (2017.01); H01M 4/02 (2006.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/366 (2013.01) [C01B 32/21 (2017.08); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); C01P 2002/02 (2013.01); C01P 2004/03 (2013.01); C01P 2004/32 (2013.01); C01P 2004/61 (2013.01); C01P 2004/84 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A negative electrode material, wherein the negative electrode material comprises a first graphite core and a composite coating layer coated on the first graphite core, and the composite coating layer comprises a second graphite inner layer located on a surface of the first graphite core and an amorphous carbon outer layer located on a surface of the second graphite inner layer, and the second graphite inner layer comprises a plurality of graphite microcrystals, wherein a ratio of the median particle diameter of the first graphite core to a median particle diameter of the graphite microcrystal is 5:1-50:1.