▎ 摘　　要

NOVELTY - The preparation method of sulfur and nitrogen co-doped graphene involves (i) using graphite as raw material, preparing oxidized graphite by modified Hummers method, (ii) dispersing oxidized graphite in water to obtain graphene oxide solution, (iii) taking certain amount of graphene oxide solution, adding ammonia, adjusting pH value, adding sodium sulfate, ultrasonically processing to obtain the mixed solution, (iv) refluxing the mixed solution at low temperature in an oil bath, and (v) suction filtering the solution through a membrane filter, and drying. USE - Preparation of sulfur and nitrogen co-doped graphene used as metal-free catalyst in fuel cell and metal air battery applications (claimed). ADVANTAGE - The method enables the preparation of sulfur and nitrogen co-doped graphene at low temperature, with excellent oxygen reduction performance, anti-methanol performance, and stability.