▎ 摘　　要

NOVELTY - Polyacrylonitrile dispersion is electrostatic spun, pre-oxidized in air and soaked in graphene oxide solution, to obtain polyacrylonitrile nanofiber/graphene oxide composite film. The obtained polyacrylonitrile nanofiber/graphene oxide composite film is high-temperature carbonized, to obtain graphene/carbon nanofiber composite membrane. Salt solution comprising molybdenum and sulfur salts and graphene/carbon nanofiber composite film are thermally reacted in solvent, to obtain molybdenum disulfide/graphene/carbon nanofiber composite material. USE - Preparation of molybdenum disulfide/graphene/carbon nanofiber composite material used as electrocatalytic material, and electrode material for lithium-ion battery and solar cell (all claimed). ADVANTAGE - The method enables preparation of molybdenum disulfide/graphene/carbon nanofiber composite material having high specific surface area and excellent conductivity. DETAILED DESCRIPTION - Polyacrylonitrile powder is added to N,N-dimethylformamide solvent and stirred, to obtain uniform, viscous polyacrylonitrile dispersion. The obtained polyacrylonitrile dispersion is electrostatic spun, to obtain polyacrylonitrile nanofiber membrane. The polyacrylonitrile spun membrane is pre-oxidized in air, to obtain pre-oxidized polyacrylonitrile nanofiber membrane. The pre-oxidized polyacrylonitrile nanofiber membrane is soaked in graphene oxide solution, to obtain polyacrylonitrile nanofiber/graphene oxide composite film. The obtained polyacrylonitrile nanofiber/graphene oxide composite film is high-temperature carbonized in inert gas, to obtain graphene/carbon nanofiber composite membrane. Molybdenum and sulfur salts are dissolved in solvent, to obtain homogeneous salt solution. The salt solution and graphene/carbon nanofiber composite film are thermally reacted in solvent at 180-240 degrees C for 10-24 hours, to obtain molybdenum disulfide/graphene/carbon nanofiber composite material.