▎ 摘　　要

NOVELTY - Composition comprises graphene oxide or reduced graphene oxide which is mesoporous and has a specific surface area of at least 364 m2/g. USE - The composition is useful as an electrode composition (claimed) for supercapacitor electrodes. ADVANTAGE - The composition: utilizes the graphene oxide or reduced graphene oxide which has a specific surface area of at least 364 m2/g, shows from a Brunauer-Emmett-Teller surface analysis the presence of micropores and mesoporus, and shows a predominance of mesopores over micropores and macropores, identifiable by gas adsorption analysis (when dried to a powder material with a critical point dryer), where the predominance of mesopores results in the improvement of a specific capacitance and/or a gas adsorption capability for the graphene oxide or reduced graphene oxide; has a supercapacitance of at least 441 F/g (claimed); and provides the supercapacitor electrodes that exhibits higher capacitance levels, faster electron transport during the charge/discharge processes and/or better transport pathways for solvated ions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the composition, comprising critical point drying the graphene oxide material or reduced graphene oxide material with use of a critical point dryer to produce a dried graphene oxide material or reduced graphene oxide material, where the critical point dryer is used with a sample holder comprising metal mesh, optionally the metal mesh having pores having a pore width of less than or equal to 500 mu , preferably 50-250 mu .