▎ 摘　　要

NOVELTY - Preparing a graphene fiber composite material comprises carbonizing raw material semi-coke lignin, carrying out graphitization, carrying out electrolytic oxidation, wet spinning, reducing and wet winding molding. USE - The composite material is useful for preparing ultra-high speed flywheel battery (claimed) as energy source for electric vehicles or as auxiliary energy source for high-end energy source for electric vehicles. ADVANTAGE - The method preparing graphene fiber material has light weight tensile strength, long shelf life, large specific power and rapid charging and is easy to maintain. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene fiber composite material, prepared as mentioned above.