US 11,658,292 B2
Silicon-based anode material and preparation method thereof, lithium ion battery
Liangqin Wei, Shanghai (CN); Fei Ma, Shanghai (CN); Dongdong Liu, Shanghai (CN); Yuhu Wu, Shanghai (CN); Zhihong Wu, Shanghai (CN); Xiaoyang Ding, Shanghai (CN); and Fengfeng Li, Shanghai (CN)
Assigned to SHANGHAI SHANSHAN TECH CO., LTD., Shanghai (CN)
Appl. No. 16/954,513
PCT Filed Dec. 30, 2019, PCT No. PCT/CN2019/129889
§ 371(c)(1), (2) Date Jun. 16, 2020,
PCT Pub. No. WO2021/134198, PCT Pub. Date Jul. 8, 2021.
Prior Publication US 2022/0328806 A1, Oct. 13, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/04 (2006.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [H01M 4/0428 (2013.01); H01M 4/134 (2013.01); H01M 4/386 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 13 Claims
OG exemplary drawing
1. A method for preparing a silicon-based anode material, comprising:
passing a silicon substrate material through a vapor deposition gas to coat a surface of the silicon substrate material with a carbon deposition layer of a certain thickness, wherein the vapor deposition gas includes a first carbon source gas and a second carbon source gas,
wherein, a volume percentage of the first carbon source gas and the second carbon source gas in the vapor deposition gas increases or decreases at different reaction stages for forming the carbon deposition layer, a side of the carbon deposited layer close to the silicon base material is more or less dense than the other side of the carbon deposited layer.