▎ 摘　　要

NOVELTY - Preparing nitrogen-doped mesoporous carbon material comprises (i) preparing graphene oxide by using modified hummers' method, (ii) taking nitric acid vapor as a pore-former, ensuring pore formation and surface activation of graphene oxide, (iii) taking ammonium salt as nitrogen dopant, heterogeneously self-assembling, drying and thermally treating the doped nitrogen. USE - The nitrogen-doped mesoporous carbon material is useful for preparing cathode of an alkali metal ion battery (claimed). ADVANTAGE - The material has distribution pore size of 2-50 nm, controllable nitrogen content of 1-10%, uniformly distributed nitrogen element and good electrochemical performance. The method is simple, economical, environmental friendly, and uses rich resources.