▎ 摘　　要

NOVELTY - Cobalt zinc sulfide/graphene/carbon nanofiber composite material is prepared by taking polyacrylonitrile powder, adding in N,N-dimethylformamide solvent, stirring, obtaining uniform ropy liquid, electrostatic spinning polyacrylonitrile solution to obtain polyacrylonitrile nanofiber film, pre-oxidizing in air atmosphere to obtain pre-oxidized polyacrylonitrile nanofiber film, immersing in graphene oxide solution, obtaining polyacrylonitrile nanofiber/graphene oxide composite film and subjecting to high temperature carbonization under inert gas protection. USE - Cobalt zinc sulfide/graphene/carbon nanofiber composite material used for high performance electrocatalytic material and electrode material of lithium ion battery and solar energy battery (all claimed). ADVANTAGE - The cobalt zinc sulfide/graphene/carbon nanofiber composite material has controllable morphology, high specific surface area and good conductivity. DETAILED DESCRIPTION - Cobalt zinc sulfide/graphene/carbon nanofiber composite material is prepared by taking polyacrylonitrile powder, adding in N,N-dimethylformamide solvent, stirring, obtaining uniform ropy liquid, electrostatic spinning polyacrylonitrile solution to obtain polyacrylonitrile nanofiber film, pre-oxidizing in air atmosphere to obtain pre-oxidized polyacrylonitrile nanofiber film, immersing in graphene oxide solution, obtaining polyacrylonitrile nanofiber/graphene oxide composite film, subjecting to high temperature carbonization under inert gas protection, obtaining graphene/carbon nanofiber composite film, taking cobalt salt, zinc salt, thiourea and urea, dissolving in deionized water to obtain uniform salt solution, subjecting graphene/carbon nanofiber composite film and uniform salt solution to hydrothermal reaction, and obtaining the product.