▎ 摘　　要

NOVELTY - Method for preparing molybdenum diselenide-cobalt diselenide/nitrogen-doped graphene aerogel composite material, involves (i) preparing graphene oxide, (ii) adding the graphene oxide to polystyrene microspheres dispersed in water, adding aniline monomer, adding a hydrochloric acid solution containing ammonium persulfate, performing ultrasonic polymerization at room temperature, quickly freezing the suspension by liquid nitrogen, freeze-drying, and calcining to obtain polyaniline/polystyrene/graphene oxide aerogel, (iii) dissolving the polyaniline/polystyrene/graphene oxide aerogel calcined in step (ii), urea, cobalt nitrate hexahydrate and ammonium heptamolybdate tetrahydrate in deionized water, aging the selenium powder dissolved in hydrazine hydrate and dripping to the above solution, and performing hydrothermal reaction, (iv) washing the product with deionized water and ethanol, and freeze-drying, and (v) calcining the product under an argon atmosphere. USE - The method is used for preparing molybdenum diselenide-cobalt diselenide/nitrogen-doped graphene aerogel composite material as electrode material for supercapacitor (all claimed). ADVANTAGE - The molybdenum diselenide-cobalt diselenide/nitrogen-doped graphene aerogel composite material has excellent electrical conductivity and high specific capacitance, and soft mechanical characteristics. DETAILED DESCRIPTION - Method for preparing molybdenum diselenide-cobalt diselenide/nitrogen-doped graphene aerogel composite material, involves (i) preparing graphene oxide, (ii) adding the graphene oxide prepared in step (i) to polystyrene microspheres dispersed in water, adding aniline monomer, adding a hydrochloric acid solution containing ammonium persulfate, performing ultrasonic polymerization at room temperature, quickly freezing the suspension by liquid nitrogen, freeze-drying, and calcining to obtain polyaniline/polystyrene/graphene oxide aerogel, (iii) dissolving the polyaniline/polystyrene/graphene oxide aerogel calcined in step (ii), urea, cobalt nitrate hexahydrate and ammonium heptamolybdate tetrahydrate in deionized water, aging the selenium powder dissolved in hydrazine hydrate and dripping to the above solution, and performing hydrothermal reaction in a PTFE reactor, (iv) washing the product obtained in step (iii) with deionized water and ethanol, and freeze-drying, and (v) calcining the product obtained in step (iv) under an argon atmosphere to obtain the molybdenum diselenide-cobalt diselenide/nitrogen-doped graphene aerogel composite material, where the molybdenum diselenide-cobalt diselenide/nitrogen-doped graphene aerogel composite material comprises molybdenum diselenide-cobalt diselenide uniformly distributed on the nitrogen-doped graphene aerogel surface to form a three-dimensional porous composite material.