▎ 摘　　要

NOVELTY - The production process involves exposing a supply of coke or coal powder to a supercritical fluid at a first temperature and a first pressure for a first period of time in a pressure vessel. The supercritical fluid is rapidly depressurized at a fluid release rate set to effect exfoliation and separation of the powder to produce isolated graphene sheets, which are dispersed in a liquid medium to produce a graphene suspension. The graphene suspension is shaped and dried to form a supercapacitor electrode that is porous and has a specific surface area greater than 200 square meter per gram. USE - Production process for graphene-based supercapacitor electrode for electrochemical capacitors. ADVANTAGE - The production process produces a graphene-based supercapacitor electrode suitable for a supercapacitor to have high active material mass loading, active materials with a high apparent density, high electrode thickness, high volumetric capacitance, and high volumetric energy density. The production process requires a reduced amount of undesirable chemical, shortened process time, less energy consumption, lower degree of graphene oxidation, and reduced or eliminated effluents of undesirable chemical species. DESCRIPTION OF DRAWING(S) - The drawing shows the flow diagram of the process for producing graphene-based supercapacitor electrode.