▎ 摘　　要

NOVELTY - The preparation of graphene/vanadium pentoxide composite material involves weighing solid ammonium metavanadate, adding to distilled water, stirring to completely dissolve, taking graphene dispersion, dripping to the ammonium metavanadate aqueous solution in stirring state, completely dissolving, taking sulfuric acid solution, dripping into the solution, heating and stirring to generate dark red precipitate, stopping dripping sulfuric acid solution when the dark red precipitate does not increase, stopping heating, precipitating the upper clear water, washing and filtering. USE - Preparation method of graphene/vanadium pentoxide composite material for battery anode (claimed). DETAILED DESCRIPTION - The preparation method of graphene/vanadium pentoxide composite material involves (1) taking distilled water at 70-90 degrees C constant temperature, weighing solid ammonium metavanadate, adding to distilled water, and stirring to completely dissolve, (2) taking graphene dispersion, where the mass-volume ratio of solid ammonium metavanadate and graphene dispersion is 5:1-2:1, dripping to the ammonium metavanadate aqueous solution in stirring state, and completely dissolving, (3) taking 40 vol.% sulfuric acid solution, where the mass-volume ratio of solid ammonium metavanadate and sulfuric acid solution is 1:1-1:3, dripping into the solution at rate of 1-5 drops/second, heating and stirring to generate dark red precipitate, stopping dripping sulfuric acid solution when the dark red precipitate does not increase, and stopping heating, (4) continuously stirring the product in step (3), precipitating the upper clear water, washing using distilled water 1-5 times, and filtering to obtain dark red precipitate, (5) placing the prepared dark red precipitate in a vacuum drying box, and drying at 120 degrees C for 12 hours to obtain graphene/vanadium pentoxide composite, and (6) calcining the graphene/vanadium pentoxide composite after drying at 300-450 degrees C for 4-8 hours, taking out and grinding. An INDEPENDENT CLAIM is included for battery anode.