▎ 摘　　要

NOVELTY - A graphene-based lithium iron phosphate nano composite anode material preparing method involves mixing solution of graphite and polymer in water or organic solvent to obtain suspension, followed by dissolving iron source, phosphorus source and lithium source in water or organic solvent to obtain mixture. The mixture is stirred in the suspension under homogeneous reaction condition, and cooled to collect precipitate. The precipitate is washed with water or ethanol, and dried to obtain graphene-lithium iron phosphate composite nanoparticle, which is carbonized in an inert gas atmosphere. USE - Method for preparing a graphene-based lithium iron phosphate nano composite anode material that is utilized in lithium battery. ADVANTAGE - The method enables preparing a graphene-based lithium iron phosphate nano composite anode material with strong coupling interface, improved charge transmitting efficiency, and high specific surface area. DETAILED DESCRIPTION - A graphene-based lithium iron phosphate nano composite anode material preparing method involves mixing solution of graphite and polymer with weight ratio of 400-100000 at a weight ratio is 1: 1 in water or organic solvent to obtain suspension, followed by dissolving iron source, phosphorus source and lithium source at a molar ratio of 1:1-1.5:2.7-3 in water or organic solvent to obtain mixture. The mixture is stirred in the suspension under homogeneous reaction condition at 180 degrees C for 2-24 hours, and cooled to room temperature to collect precipitate. The precipitate is washed with water or ethanol, and dried to obtain graphene-lithium iron phosphate composite nanoparticle. The nanoparticle is carbonized in an inert gas atmosphere at 650 degrees C for 3-10 hours to obtain finished product, where the organic solvent is ethanediol or of ethyl alcohol.