▎ 摘　　要

NOVELTY - Method for preparing graphene-modified silicon-carbon negative electrode material, involves (a) adding silicon-containing material to crosslinking agent aqueous solution, and uniformly stirring to obtain modified aqueous solution of silicon-containing material, and recording aqueous solution as solution (A), (b) adding carbon material to other crosslinking agent aqueous solution, and uniformly stirring, (c) adding graphene oxide aqueous solution to obtained solution (A), and uniformly stirring to obtain modified silicon-containing material/graphene oxide mixed solution, (d) adding obtained solution (B) to modified silicon-containing material/graphene oxide mixed solution, and stirring, and recording mixed solution as solution (C), and (e) performing solid-liquid separation on obtained solution (C), drying, and calcining at high temperature under protection of inert gas to obtain target product. USE - Method for preparing graphene-modified silicon-carbon negative electrode material. ADVANTAGE - The method improves the first effect and capacity retention rate after cycle with composite material without crosslinking agent and other crosslinking agent. DETAILED DESCRIPTION - Method for preparing graphene-modified silicon-carbon negative electrode material, involves (a) adding silicon-containing material to crosslinking agent aqueous solution, and uniformly stirring to obtain modified aqueous solution of silicon-containing material, and recording aqueous solution as solution (A), (b) adding carbon material to other crosslinking agent aqueous solution, and uniformly stirring to obtain modified aqueous solution of carbon material, and recording aqueous solution as solution (B), (c) adding graphene oxide aqueous solution to obtained solution (A), and uniformly stirring to obtain modified silicon-containing material/graphene oxide mixed solution, (d) adding obtained solution (B) to modified silicon-containing material/graphene oxide mixed solution, and uniformly stirring to obtain modified silicon-containing material/graphene oxide/modified carbon material mixed solution, and recording mixed solution as solution (C), and (e) performing solid-liquid separation on obtained solution (C), drying, and calcining at high temperature under protection of inert gas to obtain target product.