▎ 摘　　要

NOVELTY - Preparation of flexible self-supporting graphene/iron manganese cyanide composite material, comprises: (1) casting oxidized graphene gel on base body to form gel film; (2) dissolving manganese sulfate in ethanol water solution to prepare manganese sulfate solution; (3) dipping gel film and base body into the manganese sulfate solution; (4) adding potassium ferricyanide into the solution to react; and (5) taking out the processed gel together with the base body, reducing to obtain graphene/iron manganese cyanide film, cleaning, and peeling the graphene body. USE - Preparation method of flexible self-supporting graphene/iron manganese cyanide composite material used in preparing electrode material (claimed). ADVANTAGE - The method has simple technique, low cost and easy operation. The graphene oxide framework can enhance the electronic conductivity of the whole composite electrode after reduction. At the same time, the ferric cyanide manganese active substance of the porous graphene gel can provide sufficient transmission channel for the ion transport in the electrode, which is good for diffusion of the electrolyte ion. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for flexible self-supporting graphene/iron manganese cyanide composite material.