▎ 摘　　要

NOVELTY - A lithium iron phosphate composite material preparing method involves mixing ferric chloride and phosphate at ratio of 1: 1 as solutions, ultrasonically treating and uniformly mixing, synchronously adding gold/graphene oxide composite material in an ethylene glycol solution of aniline and uniformly mixed solution, and adding urea. The reaction kettle is heated, naturally cooled, filtered, washed and vacuum-dried, grinded to obtain solid powder of iron phosphate precursor, followed by uniformly mixing the solid powder of the iron phosphate with lithium carbonate, calcining, and cooling. USE - Method for preparing lithium iron phosphate composite material. ADVANTAGE - The material has good large current charging-discharging performance and excellent cyclic service life, and can be prepared in simple and cost effective manner. DETAILED DESCRIPTION - A lithium iron phosphate composite material preparing method involves mixing ferric chloride and phosphate at ratio of 1: 1 as solutions, ultrasonically treating and uniformly mixing, synchronously adding gold/graphene oxide composite material in an ethylene glycol solution of aniline and uniformly mixed solution, transferring into a reaction kettle, and adding urea. The reaction kettle is heated at 130 plus minus 5 degrees C, for 10 hours and more, naturally cooled at room temperature, filtered, washed and vacuum-dried, grinded to obtain solid powder of iron phosphate precursor, followed by uniformly mixing the solid powder of the iron phosphate with lithium carbonate at mole ratio of 1: 1, calcining at 650-700 degrees C for 4.5-5 hours under the mixed atmosphere of nitrogen and hydrogen, naturally cooling at room temperature to obtain product.