▎ 摘　　要

NOVELTY - A graphene-supported hollow octahedral iron phosphate cathode material preparing method involves dissolving commercially available graphene in deionized water to form graphene oxide uniformly dispersed suspension A. The analytical solution of the soluble divalent ferrous salt, urea and ammonium dihydrogen phosphate are added into the mixed solution of deionized water, stirred and added to the suspension A, mixed with solution B, followed by mixing the mixed solution B by microwave reaction to obtain the product C, collecting the product C by centrifugation, washing and freeze-drying. USE - Method for preparing graphene-supported hollow octahedral iron phosphate cathode material for lithium ion battery. ADVANTAGE - The method enables preparing cathode material with high yield in short time, quick, and cost effective manner. DETAILED DESCRIPTION - A graphene-supported hollow octahedral iron phosphate cathode material preparing method involves dissolving commercially available graphene in deionized water through ultrasonic processing to form graphene oxide uniformly dispersed suspension A. The analytical solution of the soluble divalent ferrous salt, urea and ammonium dihydrogen phosphate or diammonium phosphate are added to the molar ratio of 1: 1: (0.5-5) into the mixed solution of deionized water and ethylene glycol or glycerol, where the volume ratio of water to ethylene glycol or glycerin is 5: (1-5), stirred and added to the suspension A, mixed with solution B, followed by mixing the mixed solution B by microwave reaction to obtain the product C, collecting the product C by centrifugation, where the concentration of the iron salt in the solution B is 0.05-0.5 mol/ L, the concentration of the graphene oxide is 0.5-2.5 mg/l, washing and freeze-drying to obtain finished product.