▎ 摘　　要

NOVELTY - Graphene electrode does not contain a conductive material and a binder, consists essentially of graphene, and has a density of 0.2-0.7 mg/cm3. USE - The graphene electrode is used in electricity storage device such as electric double layer capacitor (all claimed) and lithium ion batteries. ADVANTAGE - The graphene electrode does not contain a conductive material or binder, has flexibility and self-supporting properties, and has excellent properties as an electrode for power storage devices (especially for electric double layer capacitors), and is produced in an efficient and environmentally friendly manner. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a method for producing the graphene electrode, involving preparing a graphene oxide dispersion and a thermally reduced graphene oxide dispersion, mixing the graphene oxide dispersion and the thermally reduced graphene oxide dispersion to prepare a mixed dispersion in which the graphene oxide and the thermally reduced graphene oxide are dispersed, vacuum filtering the mixed dispersion on a substrate to produce an intermediate structure composed of graphene oxide and thermally reduced graphene oxide, drying the intermediate structure and peeling it from the substrate to obtain a self-supporting structure, and heat treating the self-supporting structure to reduce graphene oxide in the self-supporting structure; and an electricity storage device comprising an electrode and an electrolyte, where the electrode is made of the graphene electrode.