Vulcanized cobalt-nickel/graphene/carbon nano fiber composite material and preparation method thereof

The invention belongs to the technical field of transition metal sulfide-carbon materials, and particularly relates to a vulcanized cobalt-nickel/graphene/carbon nano fiber composite material and a preparation method thereof. The preparation method includes the steps that polyacrylonitrile nano fibers are prepared through electrostatic spinning, oxidized graphene/polyacrylonitrile nano fiber aerogel is prepared through mechanical stirring and freezing drying, then graphene/carbon nano fiber aerogel is prepared through high-temperature carbonization, and finally, vulcanized cobalt-nickel nanosheets grow in situ on the graphene/carbon nano fiber aerogel through the one-step hydrothermal method. The vulcanized cobalt-nickel/graphene/carbon nano fiber composite material prepared through the method has the advantages that the material has a three-dimensional porous space structure, conductivity is good and chemical properties are stable, and can serve as an ideal high-performance electro-catalysis material and electrode materials of new energy devices such as lithium ion batteries and solar batteries.