▎ 摘　　要

NOVELTY - The method for the preparation of vulcanized cobalt-nickel/graphene/carbon nanofiber composite material involves (1) adding polyacrylonitrile powder to N,N-dimethylformamide and stirring to prepare uniform viscous dispersion, (2) electrostatic spinning polyacrylonitrile to prepare polyacrylonitrile nanofiber membrane, (3) pre-oxidizing polyacrylonitrile nanofiber membrane under an air atmosphere to obtain pre-oxidized polyacrylonitrile nanofiber membrane, (4) mechanically stirring the chopped pre-oxidized polyacrylonitrile nanofiber membrane in a solution of graphene oxide. USE - Method is useful for the preparation of vulcanized cobalt-nickel/graphene/carbon nanofiber composite material, which is useful as a high-performance electro-catalysis material and an electrode material for lithium ion batteries and solar batteries (claimed). ADVANTAGE - The vulcanized cobalt-nickel/graphene/carbon nano fiber composite material has three-dimensional porous space structure, high conductivity and stable chemical properties. DETAILED DESCRIPTION - The method for the preparation of vulcanized cobalt-nickel/graphene/carbon nanofiber composite material involves (1) adding polyacrylonitrile powder to N,N-dimethylformamide and stirring to prepare uniform viscous dispersion, (2) electrostatic spinning polyacrylonitrile to prepare polyacrylonitrile nanofiber membrane, (3) pre-oxidizing polyacrylonitrile nanofiber membrane under an air atmosphere to obtain pre-oxidized polyacrylonitrile nanofiber membrane, (4) mechanically stirring the chopped pre-oxidized polyacrylonitrile nanofiber membrane in a solution of graphene oxide to obtain uniform graphene oxide/polyacrylonitrile nanofibers paste, (5) freeze-drying the uniform graphene oxide/polyacrylonitrile nanofibers paste to obtain graphene oxide/polyacrylonitrile nanofiber gel, (6) carbonizing graphene oxide/polyacrylonitrile nanofiber gel at high temperature under inert gas protection to obtain graphene/carbon nanofiber gel, (7) dissolving cobalt salts, nickel salts, thiourea and ethylenediamine in deionized water, stirring to obtain a uniform aqueous salt solution, (8) adding graphene/carbon nanofiber gel to the aqueous salt solution, transferring to an autoclave and performing hydrothermal reaction to obtain vulcanized cobalt-nickel/graphene/carbon nanofiber composite material, and (9) heat-treating the composite material under inert gas protection to improve the crystal structure of nickel-cobalt sulfide. An INDEPENDENT CLAIM is included for the vulcanized cobalt-nickel/graphene/carbon nanofiber composite material prepared by the above method.