▎ 摘　　要

NOVELTY - A hierarchical structure porous carbon-nickel cobalt sulfide-graphene supercapacitor electrode active material is prepared by adding graphene oxide to distilled water, ultrasonically dispersing, reacting at 180-200 degrees C for 6-12 hours, filtering, drying to obtain graphene hydrogel, adding graphene hydrogel, polyvinyl alcohol, sodium alginate and chitosan to distilled water, ultrasonically dispersing, stirring for 5-10 hours, filtering, dialyzing, freeze-drying at -20 degrees C to -5 degrees C for 10-20 hours to obtain sodium alginate-chitosan-graphene composite hydrogel, adding sodium alginate-chitosan-graphene composite hydrogel to distilled water, adding nickel nitrate and cobalt nitrate, ultrasonically dispersing, stirring for 12-24 hours, vacuum drying, adding glycol, citric acid and thioacetamide, stirring, performing microwave treatment, filtering, washing and drying to obtain petal-like nickel cobalt sulfide loaded composite hydrogel and calcining in atmosphere furnace. USE - Hierarchical structure porous carbon-nickel cobalt sulfide-graphene supercapacitor electrode active material. ADVANTAGE - The supercapacitor electrode active material has three-dimensional conductive network which accelerates the transmission and diffusion of electrons and promotes the reversible progress of the pseudo-capacitance redox reaction, so that the hierarchical porous supercapacitor electrode active material exhibits excellent specific capacitance.