▎ 摘　　要

NOVELTY - Preparing titanium dioxide-graphene negative electrode material involves adding tetrabutyl titanate to anhydrous ethanol, and then adding a graphene aqueous solution, and uniformly stirring at normal temperature. The amount of absolute ethanol is mixed with 50-5000 milliliter anhydrous ethanol per gram of tetrabutyl titanate. The amount of the aqueous graphene solution added is 0.5-300 milliliter per gram of tetrabutyl titanate, and the concentration of the graphene aqueous solution is 1-10 milligram per milliliter. The mixture is centrifuged, and the obtained precipitate is freeze-dried to obtain a composite nanosheet of titanium dioxide/graphene after drying. The obtained titanium dioxide/graphene composite nanosheet is subjected to high temperature phosphating treatment in a phosphorus-containing atmosphere to obtain a phosphorus-doped titanium oxide/graphene composite nanosheet. USE - Method for preparing titanium dioxide-graphene negative electrode material. ADVANTAGE - The method enables to preparing titanium dioxide-graphene negative electrode material whcih is helps to improves conductivity of composite electrode material, improves sodium ion transport capacity of titanium dioxide surface and improves sodium storage performance of titanium dioxide/graphene composite electrode.