▎ 摘　　要

NOVELTY - Manufacture of molybdenum carbide/graphene/carbon nanofiber composite involves carbonizing polyacrylonitrile nanofiber/oxidized graphene composite film at high temperature under inert gas atmosphere to obtain a graphene/carbon nanofiber composite film, immersing the graphene/carbon nanofiber composite film in nitric acid, heating, performing acidification treatment, dissolving ammonium heptamolybdate and glucose in water to obtain homogeneous salt solution, hydrothermally-reacting the salt solution and acidified graphene/carbon nanofiber composite film, washing, drying and carbonizing. USE - Manufacture of molybdenum carbide/graphene/carbon nanofiber composite used for electrode material for lithium-ion battery and supercapacitor (all claimed), and high-performance electrocatalytic material. ADVANTAGE - The method enables efficient manufacture of molybdenum carbide/graphene/carbon nanofiber composite with high specific surface area and excellent electroconductivity. DETAILED DESCRIPTION - Manufacture of molybdenum carbide/graphene/carbon nanofiber composite involves adding polyacrylonitrile powder into N,N-dimethylformamide solvent, stirring to obtain homogeneous viscous polyacrylonitrile dispersion liquid, electrospinning the polyacrylonitrile dispersion liquid to obtain a polyacrylonitrile nanofiber membrane, pre-oxidizing the polyacrylonitrile nanofiber membrane in air atmosphere to obtain a pre-oxidized polyacrylonitrile nanofiber membrane, immersing the pre-oxidized polyacrylonitrile nanofiber membrane in an oxidized graphene solution to obtain a polyacrylonitrile nanofiber/oxidized graphene composite film, carbonizing the composite film at high temperature under inert gas atmosphere to obtain a graphene/carbon nanofiber composite film, immersing the graphene/carbon nanofiber composite film in nitric acid solution, heating, performing acidification treatment, dissolving ammonium heptamolybdate and glucose in water to obtain homogeneous salt solution, carrying out one-step hydrothermal reaction of the salt solution and acidified graphene/carbon nanofiber composite film, washing the film, drying and carbonizing at high temperature under an inert atmosphere.