▎ 摘　　要

NOVELTY - A graphene electrode (100) comprises: a metal foil (10); a non-doped graphene layer (24); and a hetero-atom (23) doped graphene layer (22), where the hetero-atom doped graphene layer is separated from the metal foil by the non-doped graphene layer. USE - As graphene electrode in energy storage device i.e. lithium ion battery, supercapacitor or fuel cell (all claimed). ADVANTAGE - The graphene electrode exhibits improved electrical characteristic (such as high capacity, high carrier mobility, and low irreversible capacity); and is suitable for being used in energy storage devices. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) fabricating a graphene electrode involving providing the metal foil; forming the graphene layer on the metal foil; and subjecting the graphene layer to a dry-process surface modification treatment, thereby doping the hetero-atoms into the graphene layer surface, where the steps for forming the graphene layer comprise: forming the coating on the metal foil, where the coating is formed from a graphene-containing composition, and subjecting the coating to a drying process, obtaining the graphene layer; and (2) an energy storage device comprising a first electrode, where the first electrode is the graphene electrode; a second electrode; and an isolation membrane disposed between the first electrode and the second electrode. DESCRIPTION OF DRAWING(S) - The figure shows a cross-section view of a graphene electrode. Metal foil (10) Graphene layer (20) Hetero-atom doped graphene layer (22) Hetero-atom (23) Non-doped graphene layer (24) Graphene electrode (100)