▎ 摘　　要

NOVELTY - Preparing sodium vanadium phosphate electrode material of vanadium position chromium doped composite graphene comprises (1) taking sodium source, phosphorus source, ammonium metavanadate and ascorbic acid as raw materials, using water as solvent, and preparing the sodium vanadium phosphate by hydrothermal method, (2) (2-1) taking sodium vanadium phosphate, graphene oxide and hydrazine hydrate as raw materials, and using ethanol or ethylene glycol solution as solvent to make slurry, and (2-2) using the chromium-containing citric acid solution as bottom liquid, adding the slurry to the bottom liquid, and preparing chromium-doped composite graphene sodium vanadium phosphate (Na3V2-xCrx(PO4)3)/graphene xerogel, where the chromium-containing citric acid solution is prepared by adding chromium source and citric acid to water, and (3) sintering the xerogel to obtain chromium-doped composite graphene sodium vanadium phosphate/graphene electrode material. USE - The method is useful for preparing sodium vanadium phosphate electrode material of vanadium position chromium doped composite graphene. ADVANTAGE - The electrode material has excellent specific capacity, cycle performance and rate capability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for sodium vanadium phosphate electrode material of vanadium position chromium doped composite graphene prepared by the above method.