▎ 摘　　要

NOVELTY - Preparation of silicon/graphene nanocomposite material comprises preparing graphite oxide, under surface active agent, preparing two oxide silicon/graphene composite material, and putting thermal recovery furnace for metal magnesium to prepare silicon/graphene composite material. USE - Method of preparation of silicon/graphene composite material used for lithium ion battery cathode (claimed). ADVANTAGE - The method can prevent silicon material and is good in during insertion and the lithium ion is volume expansion to better improve cycle performance of material in material circulation for 30 times undercurrent of 200 m Angstrom /g, and can maintain of more than 1100 m Angstrom /g.