▎ 摘　　要

NOVELTY - The method involves adding polyacrylonitrile to N, N-dimethylformamide to obtain precursor solution, using electro spinning the precursor solution to obtain spinning film, carbonizing the spinning film under the action of protective gas to form a base carbon material, carrying out electro catalytic reduction of carbon dioxide gas source to obtain a gaseous product mixed with hydrocarbon gas and hydrogen, and introducing into a tubular furnace, calcining, cooling, washing and drying to obtain the carbon material electrode of the graphene. USE - The method is useful for preparing graphene electrode taking carbon dioxide reduction product as carbon source, where the graphene electrode is useful in a liquid flow battery. ADVANTAGE - The method avoids the contradiction between the carbon product and hydrogen in the carbon dioxide reduction process, the graphene shape is controllable, at the same time, the method does not need additional hydrogen, it is energy-saving and environment-friendly, meeting the double-carbon target.