▎ 摘　　要

NOVELTY - The electrode has a sandwich structure. The electrode comprises a first reduced graphene oxide (RGO) thin film layer (1), a nano-carbon layer (2) and a second RGO thin film layer (3). The nano-carbon layer is arranged between the first and second RGO thin film layers. USE - Electrode having flexible self-supporting structure. ADVANTAGE - The electrode structure is unique, the preparation method is simple and the cost is low, and it has high area specific capacitance and excellent circulation stability when used in super capacitor electrode, and has wide application prospect. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of electrode of flexible self-supporting structure. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the electrode structure. First reduced graphene oxide thin film layer (1) Nano-carbon layer (2) Second reduced graphene oxide thin film layer (3)