▎ 摘　　要

NOVELTY - A lithium-ion battery anode material preparing method involves preparing lithium iron phosphate, and preparing precursor. Porous graphene material is prepared by adding graphite powder to concentrated sulfuric acid, stirring and adding hydrogen peroxide, stirring at 40-45 degrees C for 1-2 minutes, adding concentrated sulfuric acid and distilled water to the mixture, and stirring for 40-50 minutes. The precursor powder and the graphene powder are sieved respectively, followed by performing two-stage sintering on the two sieved powders in a tube atmosphere furnace, to obtain a finished product. USE - Method for preparing lithium-ion battery anode material that is utilized for a portable game machine. ADVANTAGE - The material has improved conductivity, so that the cycle stability and the charging rate are enhanced and the environmental adaptability of the battery is improved. DETAILED DESCRIPTION - A lithium-ion battery anode material preparing method involves preparing lithium iron phosphate, and preparing precursor by mixing acetate, iron sulfate and ammonium carbonate, and iron, lithium and phosphorus at ratio of 1.0-1.2: 1.01.2: 1.0-1.1, mixing uniformly, dissolving the mixture in de-ionized water to prepare into 23 mol/l mixed solution, weighing 4-7% lithium iron phosphate, oxalic acid and 4-5% acetone mixed solution, uniformly stirring, placing the reaction container at 90-100 degrees C in water bath, at stirring speed of 300-400 r/minute, carrying out ultrasonic dispersion for 15-20 minutes, and drying the mixed solution to obtain precursor, and drying after taking out the precursor into powder. Porous graphene material is prepared by adding graphite powder to concentrated sulfuric acid, stirring and adding hydrogen peroxide, stirring at 40-45 degrees C for 1-2 minutes, adding concentrated sulfuric acid for 2-3 times and distilled water to the mixture, stirring for 40-50 minutes, after centrifugal separation, repeatedly washing by distilled water and ethylene glycol to obtain the graphite oxide nanometer material, placing 15-20 mg/ml graphite oxide nanometer material with graphene oxide water solution into the polytetrafluoroethylene steel reaction kettle, where the graphene oxide water solution with polytetrafluoroethylene has volume ratio of 3-4: 5, sealing the stainless steel reaction kettle, air drying, and naturally cooling the stainless steel kettle to the room temperature, absorbing water from the solution using filter paper, fully drying, ball milling to obtain the porous graphite dilute material. The precursor powder and the graphene powder are sieved respectively, followed by performing two-stage sintering on the two sieved powders in a tube atmosphere furnace, at 800-900 degrees C for 10-12 hours to obtain a finished product.