▎ 摘　　要

NOVELTY - The preparation of graphene fiber, involves placing partial graphene oxide inside composite ion solution and ultrasonically dispersing to obtain graphene oxide solution, adding chloroacetic acid solution, stirring at 70-75 degrees C for 1-3 hours, cooling to room temperature, carrying out multi-stage filtration and drying to obtain carboxylated graphene oxide, ultrasonically dispersing the material in N-dimethylformamide solution and spinning the resulting solution. USE - Preparation of graphene fiber used for energy storage device, photovoltaic device and sensor. ADVANTAGE - The method enables preparation of graphene fiber with increased conductivity and high flexibility by simple and economical process.