▎ 摘　　要

NOVELTY - A sandwich-shaped hollow spherical lithium ion battery anode material is prepared by dispersing manganese carbonate and graphene oxide in water, reducing to obtain a reduced graphene oxide, adding hydrochloric acid to remove manganese carbonate template spheres to obtain reduced graphene oxide hollow spheres, dispersing the reduced graphene oxide hollow spheres, tungsten chloride and thioacetamide in water to perform hydrothermal reaction, growing tungsten disulfide on the surface of the reduced graphene oxide hollow spheres to obtain tungsten disulfide doped thio reduced graphene, reacting the tungsten disulfide doped thio reduced graphene, 3-aminopropyltrimethoxysilane and anhydrous ethanol under reflux condition, mixing with a graphene oxide aqueous phase dispersion, mixing with melamine, heat-treating the obtained product, and reducing outermost graphene oxide to reduced graphene oxide. USE - Sandwich-shaped hollow spherical lithium ion battery anode material. ADVANTAGE - The sandwich-shaped hollow spherical lithium ion battery anode material has excellent electrochemical performance, and can be prepared by simple method. The anode electrode material improves volume expansion of the existing tungsten disulfide. DETAILED DESCRIPTION - Sandwich-shaped hollow spherical lithium ion battery anode material is prepared by dispersing manganese carbonate and graphene oxide in water, freeze-drying, heat treating in an inert protective gas atmospheres at 250-300 degrees C to obtain reduced graphene oxide, adding hydrochloric acid to remove the manganese carbonate template spheres to obtain reduced graphene oxide hollow spheres, dispersing the reduced graphene oxide hollow spheres, tungsten chloride and thioacetamide in water for hydrothermal reaction, growing tungsten disulfide on the surface of the reduced graphene oxide hollow spheres through in situ processing to obtain tungsten disulfide doped thio reduced graphene, performing hydrothermal reaction at 120-200 degrees C for 10-30 hours, reacting the tungsten disulfide doped thio reduced graphene, 3-aminopropyltrimethoxysilane and anhydrous ethanol under reflux conditions, cooling and removing impurities, mixing with graphene oxide aqueous phase dispersion and leaving still, grinding melamine and mixing by suction filtration and drying, achieving nitrogen doping of the inner layer of reduced graphene oxide and the outer layer of graphene oxide by nitrogen, heat-treating the obtained product, exhausting air by introducing a mixed gas of inert protective atmospheres/hydrogen, raising the temperature from 20-25 degrees C to 700-800 degrees C at a rate of 5-10 degrees C/minute for 1-5 hours, cooling to room temperature, reducing the outermost graphene oxide to reduced graphene oxide, obtaining nitrogen doped graphene coated tungsten disulfide doped thio reduced graphene sandwich-shaped hollow spherical lithium ion battery anode material. The molar ratio of carbon element in the reduced graphene oxide hollow spheres to tungsten element in tungsten chloride is 1-10: 1. The molar ratio of tungsten element in tungsten chloride to sulfur element in thioacetamide is 1: 2-10. An INDEPENDENT CLAIM is included for preparation of sandwich-shaped hollow spherical lithium ion battery anode material.