▎ 摘　　要

NOVELTY - The preparation method of graphene-iron-reduced graphene oxide composite material involves (1) dissolving gelatin, trisodium citrate and ferric nitrate nonahydrate in deionized water, transferring to a hydrothermal reactor after completely dissolved, hydrothermally-reacting, centrifuging after the hydrothermal reaction is finished, and drying, and (2) dissolving reduced graphene oxide solution and the sample in deionized water, stirring at 65-75 degrees C for 0.5-1.5 hour, uniformly mixing, transferring to a hydrothermal reactor, hydrothermally reacting, centrifuging after finishing the reaction, and drying. USE - Preparation method of graphene-iron-reduced graphene oxide composite material (claimed) for use as electrode material of supercapacitor. ADVANTAGE - The method enables preparation of graphene-iron-reduced graphene oxide composite material with shortened synthesis time and excellent electrochemical performance, by simple and environmentally-friendly process.