▎ 摘　　要

NOVELTY - Preparing lithium vanadium phosphate/fluorinated graphene composite anode material comprises e.g. (i) taking lithium source, vanadium source, fluorine source and phosphorus atom, mixing with deionized water, adding sodium citrate and graphene oxide, fully stirring, (ii) calcining at high-temperature under protective atmosphere, taking out and cooling, (iii) calcining, and (iv) taking the substrate, and subjecting to low temperature carbonization and high temperature synthesis in protective atmosphere to obtain lithium vanadium phosphate/fluorinated graphene composite cathode material. USE - The method is useful for preparing lithium vanadium phosphate/fluorinated graphene composite anode material. ADVANTAGE - The method: increases the contact area between the electrolyte and the composite material; shortens lithium ion transmission path; improves the lithium ion transmission efficiency, and excellent electrochemical performance. DETAILED DESCRIPTION - Preparing lithium vanadium phosphate/fluorinated graphene composite anode material comprises (i) taking lithium source, vanadium source, fluorine source and phosphorus atom according to ratio of lithium, vanadium, fluorine and phosphorus is 1:1: 1:1, mixing with deionized water, adding sodium citrate and graphene oxide, fully stirring at specific temperature to obtain mixed solution, (ii) taking carbon substrate having the surface adhering with the vanadium compound , lying flat on the liquid mixture obtained in the step (i) for many days, taking out the impregnated carbon-based on drying, calcining at high-temperature under protective atmosphere for period of time, taking out and cooling, (iii) calcining the cooled substrate, repeating the steps (i), and (ii) for no less than 2 times, (iv) taking the substrate obtained in the step (iii), and subjecting to low temperature carbonization and high temperature synthesis in protective atmosphere to obtain lithium vanadium phosphate/fluorinated graphene composite cathode material on the surface of the substrate.