▎ 摘　　要

NOVELTY - A nitrogen-sulfur double-doped graphene/graphite composite material is prepared by ultrasonically dispersing graphene oxide and thiourea in deionized water to disperse thiourea in aqueous solution, adding ascorbic acid, ultrasonically treating to dissolve all ascorbic acid, heating under water bath condition until solution is viscous state, adding natural graphite, strongly and magnetically stirring to uniformly disperse natural graphite, transferring to water bath, heating and self-assembling, cooling to room temperature to obtain black columnar hydrogel, soaking in mixed solution of deionized water and ethanol, freeze-drying for 36-48 hours to obtain black columnar aerogel, putting into quartz boat, and calcining in tubular furnace for 3-5 hours. USE - The method is used for preparing nitrogen-sulfur double-doped graphene/graphite composite material in lithium ion battery anode material (claimed). ADVANTAGE - The material is suitable for industrial production in large scale, improves electrochemical performance of lithium ion battery anode material, and simplifies operation process.