▎ 摘　　要

NOVELTY - A lithium ion battery nitrogen doped carbon coated graphene material is prepared by using hummer method in graphite oxide, ultrasonically peeling, forming graphene oxide suspension, adding cyanamide solution, uniformly stirring, putting into reaction kettle, closing for hydrothermal reaction, washing with deionized water, drying, and heat treating under protective atmosphere. USE - Method for preparing lithium ion battery nitrogen doped carbon coated graphene material (claimed). ADVANTAGE - The method is simple, and has strong operability.