▎ 摘　　要

NOVELTY - High-stability silicon-carbon anode material comprises 5-50 wt.% silicon-carbon composite material, 40-85 wt.% nitrogen and sulfur co-doped porous carbon, and 0.5-10 wt.% graphene. The silicon-carbon composite material is prepared by coating organic matter layer on surface of elemental silicon to crack carbon. USE - High-stability silicon-carbon anode material used for lithium ion battery (claimed). ADVANTAGE - The anode material utilizes silicon covered with carbon to relieve volume expansion, and has improved wettability material, and increased storage capacity, uniformity and compactness. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of high-stability silicon-carbon anode material comprising dispersing elemental silicon in organic carbon source solution to obtain mixed solution with solid content of 10-50%, stirring mixture for 2 hours, evaporating to dryness, carbonizing residue in tubular furnace, and grinding to obtain silicon-carbon composite material; preparing nitrogen and sulfur co-doped porous carbon in anhydrous ethanol solution, dispersing silicon-carbon composite material in solution, stirring, adding graphene oxide dispersion, sonicating mixture for 0.5-3 hours, adding polyacrylamide dropwise for coagulation, removing solid material, and drying; and reduce graphene oxide to graphene in dried material by tube furnace, cooling, grinding, and sieving.