▎ 摘　　要

NOVELTY - Lithium-ion battery anode material with nanometer structure, which is a grain shell structure formed by uniformly coating 20-300 nm of lithium iron phosphate, lithium vanadium phosphate or lithium cobalt oxide, and graphene in a mass ratio of (50-1):1 on the layer of graphene, is claimed. The shell is a porous carbon with a thickness of 1-20 nm, where the source of carbon is glucose, sucrose or citric acid. The mass of the shell is 1-30%. USE - Used as a lithium-ion battery anode material. ADVANTAGE - The anode material has good conductivity, recycling property, high capacity, and uniform and small particle size with simple and easy industrial production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the lithium-ion battery anode material with nanometer structure, comprising: (i) adding black lead oxide into lithium cobalt oxide solution prepared by taking lithium nitrate and cobalt nitrate as raw materials, where the solution of raw material and black lead oxide is in a mass ratio of 1:(0.01-0.3), uniformly stirring, reacting at 80-100 degrees C, obtaining gel, drying and grinding the gel, obtaining a primary product; (ii) placing the primary product into a vacuum heating furnace at a vacuum of 0.01-10 kPa, heating to 200-600 degrees C at a speed of 5-20 degrees C/minute, pre-sintering the primary product at a constant temperature for 5-10 hours to obtain a nuclear material; and (iii) grinding the nuclear material with glucose or sucrose or citric acid in a mass ratio of 1:(0.02-0.2), uniformly grinding, placing into a sintering furnace, heating at 500-800 degrees C at a speed of 5-20 degrees C/minute and sintering at constant temperature for 5-12 hours.