▎ 摘　　要

NOVELTY - Preparing graphene doped with nitrogen and sulfur, comprises mixing graphene, nitrogen-sulfur doping source and agate ball uniformly, carrying out ball milling reaction, washing, filtering, and freeze-drying after the ball milling reaction to obtain nitrogen and sulfur double-doped graphene. USE - The method is useful for preparing graphene doped with nitrogen and sulfur. ADVANTAGE - The method has the characteristics of large specific surface area and high specific capacitance, and exhibits excellent rate performance and stability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) graphene doped with nitrogen and sulfur obtained by the method as mentioned above; and (2) preparing supercapacitor material, comprising mixing 80-90 pts. wt. nitrogen, sulfur double-doped graphene, 5-10 pts. wt. conductive acetylene black and 5-10 pts. wt. Polyvinylidene fluoride binder in the solvent, preparing the slurry, coating the slurry evenly on the substrate, and extruding the super capacitor electrode material.