▎ 摘　　要

NOVELTY - An electrode material preparation method involves utilizing phosphoric acid, ferrous sulfate heptahydrate and lithium hydroxide monohydrate as raw materials and utilizing ascorbic acid as reducing agent and carbon source and ethylene glycol solution as reducing agent and stabilizer to synthesize lithium iron phosphate precursor by precipitation method, under stirring conditions, adding ammonia water to lithium iron phosphate precursor, under continuous stirring, adjusting pH to 9-11, performing hydrothermal reaction at 170-190 degrees C for 11-13 hours and obtaining lithium iron phosphate. The lithium iron phosphate is ultrasonically dispersed in ethanol followed by slowly dropping silver/graphene oxide solution, stirring and drying to obtain quadrangular columnar lithium iron phosphate/silver/graphene oxide composite electrode material. USE - Method for preparing electrode material. ADVANTAGE - The method enables preparing electrode material with excellent charge and discharge performance and cycle life and high capacity in a simple manner at large scale by utilizing wide source of raw materials.