▎ 摘　　要

NOVELTY - The preparation method of antimony/nitrogen-doped graphene composite material involves mixing graphene oxide, 1-ethyl-3-methylimidazolium dicyanamide and antimony powder and ball milling, dispersing ball milled mixture in distilled water, freezing and drying, and carbonizing obtained product in an argon atmosphere. USE - The method is useful for preparing antimony/nitrogen-doped graphene composite material, which is useful as cathode material for sodium ion battery (all claimed). ADVANTAGE - The method enables simple preparation of antimony/nitrogen-doped graphene composite material with excellent electrochemical performance in an environmentally-friendly manner. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for antimony/nitrogen-doped graphene composite material prepared by the method.