Lithium-ion battery anode material and preparation method thereof, anode, and lithium-ion battery

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:
• a weight ratio of the graphite particles to the nano silicon particles is 1:(0.02-0.2);
• a weight ratio of the graphite particles to the carbon is 1:(0.03-0.3);
• and
• a weight ratio of the graphite particles to the lithium metal is 1:(0.01-0.2).

A lithium-ion battery, comprising a lithium-ion battery anode, the lithium-ion battery anode comprises:

• 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;
• 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.