▎ 摘　　要

NOVELTY - Method for producing a graphene material, involves preparing graphene oxide, heat-treating the graphene oxide at 300-700° C, dispersing the heat-treated graphene oxide in a dispersion medium to prepare a thermally reduced graphene oxide dispersion, and hydrothermally treating the thermally reduced graphene oxide dispersion at 150-250° C. USE - The method is used for producing a graphene material which is used in a graphene electrode for an electric double layer capacitor (all claimed). ADVANTAGE - The graphene material has excellent physical properties, such as electrical properties through a production process which does not use a reducing agent, is economical and efficient to produce graphene materials through a low-risk process, and is easy to scale up for mass production. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) (1) a graphene material having substantially no aggregation of graphene sheets and having an oxygen content of 7% or less by XPS analysis; and (2) (2) a graphene electrode containing the graphene material.