▎ 摘　　要

NOVELTY - Fabricating high-performance carbon fiber, comprises a mixing step to making a graphene carbon fiber composition by mixing a composition for fabricating carbon fiber and graphene powder, where the composition for fabricating carbon fiber includes one of polyacrylonitrile (PAN)-based carbon fiber, pitch-based carbon fiber and/or rayon-based carbon fiber, and a heat treatment step of the graphene carbon fiber composition, where the graphene powder serves as a seed of nanoribbon-shaped graphite to be formed during carbon fiber fabricating processes. USE - The method is useful for fabricating high-performance carbon fiber. ADVANTAGE - The method fabricates high-performance carbon fiber (or graphite fiber) with lowered graphitization temperature by using graphene carbon fiber composition including nano-sized graphene. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for fabricating high-performance carbon fiber, comprising a mixing step to fabricate a graphene suspension by mixing a composition for fabricating carbon fiber with graphene powder to form a graphene carbon fiber composition, and dispersing the graphene carbon fiber composition in a solvent, where the composition for fabricating carbon fiber includes one of PAN-based carbon fiber, pitch-based carbon fiber and/or rayon-based carbon fiber, a fabrication step to fabricate mixed-fiber by controlling a viscosity of the graphene suspension and performing a fiberization process of the graphene suspension, a stabilization step to stabilize the fibers by heating at 200-400 degrees C under atmosphere, and a heat treatment step of fabricating nano ribbon-shaped graphite by graphitization the flame resistant fiber at a temperature less than 2500 degrees C, where the graphene powder included in the graphene carbon fiber composition serves as a seed of graphite to be formed during high-performance carbon fiber fabricating processes.