▎ 摘　　要

NOVELTY - Preparing porous silicon carbon anode material involves dispersing the silicon material in the solvent and mixing uniformly, then adding the graphene oxide dispersion and the transition metal ion solution, mixing, and simultaneously adding polyacrylamide and sodium hypophosphite solution dropwise. The transition metal ion is reduced to transition metal M attached to the surface of the silicon material, the graphene oxide dispersion liquid coagulates and adheres to the surface of the silicon material to generate a silicon material precipitation material, the surface of the silicon material contains transition metal M and graphene oxide, taken the precipitated material of silicon material and dried. The precipitation material is heated at a high temperature to reduce graphene oxide to graphene in a protective atmosphere and prefabricated layer is formed on the surface of the silicon material. USE - Method for preparing porous silicon carbon anode material. DETAILED DESCRIPTION - Preparing porous silicon carbon anode material involves dispersing the silicon material in the solvent and mixing uniformly, then adding the graphene oxide dispersion and the transition metal ion solution, mixing, and simultaneously adding polyacrylamide and sodium hypophosphite solution dropwise. The transition metal ion is reduced to transition metal M attached to the surface of the silicon material, the graphene oxide dispersion liquid coagulates and adheres to the surface of the silicon material to generate a silicon material precipitation material, the surface of the silicon material contains transition metal M and graphene oxide, taken the precipitated material of silicon material and dried. The precipitation material is heated at a high temperature to reduce graphene oxide to graphene in a protective atmosphere and prefabricated layer is formed on the surface of the silicon material. The prefabricated layer includes transition metal M and graphene cooled to obtain a coated prefabricated layer silicon material, pickled the silicon material covering the prefabricated layer to remove the transition metal M in the prefabricated layer to form a graphite silicon material with a porous structure, added the graphite silicon material with a porous structure to a carbon precursor, and performed carbon coating treatment to form a crude product of porous silicon carbon anode material. The crude product of the porous silicon-carbon negative electrode material is carbonized to obtain product.