▎ 摘　　要

NOVELTY - A graphene film electrode material preparing method involves utilizing improved Hummers method to obtain the oxidized graphene water solution with concentration of 3-6 mg/mL. The oxidized graphene aqueous solution is mixed oxalic acid solution with concentration of 12-50 mg/mL in the same volume, mixed uniformly, poured into the PTFE container, freeze dried, pressed and formed to prepare graphene oxide film. The graphene oxide film is transferred to a container having proper oxalic acid saturated solution to the PTFE container to make it wet, performed hydrothermal reaction at 140-180 degrees C for 8-14 hours, cooled to room temperature, washed and dried to obtain the finished product. USE - Method for preparing graphene film electrode material. ADVANTAGE - The method enables preparing the graphene film electrode material with long circulation service life in simple and eco-friendly manner.