▎ 摘　　要

NOVELTY - The producing method involves exposing a suspension or slurry to ultrasonication at an energy level for a sufficient length of time to produce a graphene suspension containing isolated graphene sheets dispersed in liquid medium. This is done after dispersing particles of coke or coal powder in a liquid medium containing an optional surfactant or dispersing agent to produce a suspension or slurry. The method also involves shaping and drying the graphene suspension to form supercapacitor electrode that is porous and has a specific surface area greater than 200 square meter per gram. USE - Producing method for graphene-based supercapacitor electrode from a supply of coke or coal powder containing domains of hexagonal carbon atoms and/or hexagonal carbon atomic interlayers with an interlayer spacing. ADVANTAGE - The graphene production process requires a reduced amount of undesirable chemicals or elimination of these chemicals all together, shortened process time, less energy consumption, lower degree of graphene oxidation, reduced or eliminated effluents of undesirable chemical species into the drainage. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart showing method of producing graphene-based electrode.