GRAPHITIZED POROUS SILICON-CARBON ANODE MATERIAL, PREPARATION METHOD THEREOF AND LITHIUM ION BATTERY

The present disclosure relates to the technical field of anode material of lithium ion battery, and discloses a graphitized porous silicon-carbon anode material, a preparation method thereof, and a lithium ion battery. The silicon-carbon anode material comprises a core and a carbon coating layer coated on an outer surface of the core, and is characterised in that the core sequentially comprises an inner layer and a shallow surface layer from inside to outside, the silicon-carbon anode material is internally provided with pores in gradient distribution, and the porosity is gradiently decreased from inside to outside along the inner layer, the shallow surface layer and the carbon coating layer; and the core comprises a silicon-carbon composite comprising nano-silicon particles, a conductive agent and a graphitized carbon material. The graphitized silicon-carbon anode material can solve the problems that a porous structure is prone to crack and the multiplying power is reduced.