▎ 摘　　要

NOVELTY - Preparation of graphene fiber comprises adding graphene oxide to deionized water, ultrasonically dispersing to obtain aqueous solution of graphene oxide, mixing the aqueous solution of graphene oxide with chloroacetic acid, heating at 60-80 degrees C while stirring for 0.5-3 hours, cooling to room temperature, filtering, drying to obtain carboxylated graphene oxide, dispersing carboxylated graphene in N,N-dimethylformamide by ultrasonic dispersion to obtain spinning dope and performing wet spinning. USE - Method for preparing graphene fiber (claimed) used for energy storage devices, photovoltaic devices and sensors. ADVANTAGE - The method is simple and easy for industrial production. The product has excellent conductivity and high flexibility.