▎ 摘　　要

NOVELTY - Preparing graphene, comprises disposing 1/4-1/2 anode electrode in electrolyte, performing charging and discharging cycles in preset voltage interval with constant current density, after few cycles, the part of anode electrode not immersing in the electrolyte completely expands, stripping to obtain solid graphene/salt mixture; the anode electrode comprises graphite paper, graphite rods and/or graphite plates; the cathode electrode comprises zinc foil, magnesium foil, aluminum foil and/or graphite paper; the electrolyte comprises neutral salt electrolyte; dissolving and dispersing the mixture with water, separating, washing and drying to obtain graphene. USE - The graphene is useful in the super capacitor material with excellent electrochemical performance (claimed). ADVANTAGE - The graphene: has low degree of oxidation and few defects. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) the graphene is prepared by the above mentioned method, and (2) super capacitor comprising graphene.