US 12,009,513 B2
Lithium-ion battery anode material and preparation method thereof, anode, and lithium-ion battery
Zhengfu Jiang, Shenzhen (CN); Shicai Li, Shenzhen (CN); Xiaopeng Jiao, Shenzhen (CN); Yongqing Gan, Shenzhen (CN); and Xiao Shi, Shenzhen (CN)
Assigned to BYD COMPANY LIMITED, Shenzhen (CN)
Appl. No. 17/255,188
Filed by BYD COMPANY LIMITED, Shenzhen (CN)
PCT Filed Jun. 19, 2019, PCT No. PCT/CN2019/091902
§ 371(c)(1), (2) Date Dec. 22, 2020,
PCT Pub. No. WO2019/242647, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 201810654565.X (CN), filed on Jun. 22, 2018.
Prior Publication US 2021/0280860 A1, Sep. 9, 2021
Int. Cl. H01M 4/38 (2006.01); H01M 4/134 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/386 (2013.01) [H01M 4/134 (2013.01); H01M 4/366 (2013.01); H01M 4/382 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A lithium-ion battery anode material, comprising:
a core-shell structured composite material, comprising:
a core material, an inner shell material, and an outer shell material, wherein:
the core material comprises graphite particles; and
the inner shell material comprises a continuous phase and a dispersing phase, wherein:
the dispersing phase comprises nano silicon-based particles,
 wherein a chemical formula of the nano silicon-based particles is SiOx, 0<x<2; and
the continuous phase comprises carbon; and
the outer shell material comprises lithium metal, wherein:
an inner shell thickness of the core-shell structured composite material is 0.5 μm-2 μm; and
an outer shell thickness of the core-shell structured composite material is 0.1 μm-5 μm.