▎ 摘　　要

NOVELTY - Preparation of porous graphene-coated lithium-vanadium phosphate involves adding citric acid and ammonium hydrogen phosphate to water, uniformly stirring, obtaining a colorless and transparent solution, adding vanadium pentoxide powder to the colorless and transparent solution, uniformly stirring, obtaining an orange solution, adding lithium carbonate to the orange solution, heating in a water bath under stirring, obtaining a dark green solution, adding porous graphene prepared by recycling graphite from waste power batteries to the dark green solution, stirring, heat-treating obtained dark black solution, drying obtained sol, grinding, adding obtained dark black powder to a reactor, introducing a mixed gas of argon and hydrogen, heating, cooling to room temperature, pressing obtained powder into a sheet material, placing the sheet material in the reactor, introducing mixed gas of argon and hydrogen, heating, then cooling to room temperature, and grinding into powder. USE - Preparation of porous graphene-coated lithium-vanadium phosphate. ADVANTAGE - The method enables economical preparation of porous graphene-coated lithium-vanadium phosphate with high yield. The porous graphene provides more active sites to lithium-vanadium phosphate, and the pores on porous graphene have favorable transmission of electrons and electrolyte.