| abstract |
The invention discloses a manganese dioxide/graphene superstructure electrode and a preparation method thereof, belonging to the field of electrode preparation in electrochemical energy storage technology; the electrode comprises a graphene carrier with a helical 24-hedral Gyroid structure, and a manganese dioxide layer. Firstly, a helical 24-hedral (Gyroid) superstructure template is designed, and the UV-curable resin is mixed with silica particles for photopolymerization printing to obtain a resin template; the resin template is degreasing and sintered, and the photopolymer is removed to obtain a silica superstructure. Structure template. Graphite layers were then grown on the surface of the silica superstructure template by chemical vapor deposition. After that, the silicon dioxide is etched away with an aqueous hydrofluoric acid solution to obtain a graphene superstructure electrode, and manganese dioxide nanosheets are grown on the surface of the graphene superstructure electrode to form a manganese dioxide/graphene superstructure electrode. The helical icosahedral structure has a continuous surface, on which the manganese dioxide layer can be uniformly deposited, and has a high specific surface area, and the active material loading can reach 20-100 mgcm -2 . |