▎ 摘　　要

NOVELTY - Preparation of nickel oxide-graphene fiber supercapacitor electrode material involves centrifuging aqueous graphene oxide dispersion, ultrasonically processing to obtain an graphene oxide spinning solution, injecting the resultant into a coagulation bath containing calcium chloride/ethanol solution, soaking to obtain graphene oxide fiber, reducing the graphene oxide fiber by treating with hydroiodic acid to obtain a graphene fiber, mixing the graphene fiber and precursor solution of nickel oxide obtained using e.g. nickel sulfate hexahydrate and carrying out hydrothermal reaction. USE - Preparation of nickel oxide-graphene fiber supercapacitor electrode material (claimed). ADVANTAGE - The method is simple, economical and produces supercapacitor electrode material with large specific surface area. The supercapacitor fabricated with nickel oxide-graphene fiber electrode material has excellent specific capacitance, magnification characteristics and electrochemical stability. DETAILED DESCRIPTION - Preparation of nickel oxide-graphene fiber supercapacitor electrode material involves centrifuging aqueous graphene oxide dispersion, ultrasonically processing to obtain an graphene oxide spinning solution, injecting the resultant into a coagulation bath containing calcium chloride/ethanol solution, immersing for 20-30 minutes, washing the resultant with deionized water and ethanol to remove the remaining coagulation solution, collecting the graphene oxide fiber on a support, drying at high-temperature, treating the resultant with hydroiodic acid at 90-120 degrees C for 8-12 hours, heating at 1000 degrees C in a reducing atmosphere of hydrogen and argon, cooling to obtain a graphene fiber, mixing nickel sulfate hexahydrate, sodium hydroxide and water, stirring to obtain a precursor solution, transferring the graphene fiber into a reaction kettle, adding precursor solution, carrying out hydrothermal reaction at 140-180 degrees C for 12-24 hours, cooling to room temperature, washing, drying and annealing at 300 degrees C.