▎ 摘　　要

NOVELTY - Producing nanoporous graphene sheet-type structured high and low surface area carbon sheets from petroleum coke (petcoke), comprises (a) cleaning petroleum coke with deionized water and drying in oven at 80-120 degrees C for 12-24 hours, (b) grinding the resultant dried petcoke, (c) sloid state mixing of ground dried pet coke with potassium hydroxide in a weight ratio of 1:3-1:0.5, (d) annealing the resulted mixture at 800-1000 degrees C under argon atmosphere for 1-4 hours, (e) washing the pyrolyzed carbon thoroughly with 1-2 M hydrochloric acid and deionized water until it is neutral, and (f) drying the resultant pyrolyzed carbon at 80-100 degrees C for 12-24 hours to obtain porous carbon sheets having porous, high surface area graphene type structured carbon, where the low surface area carbon is produced by heating petcoke in tubular furnace under argon atmosphere at 10 degrees C/minute up to 1000 degrees C for 5 hours, and the high surface area carbon is produced by chemical activation of petcoke. USE - The method is useful for producing nanoporous graphene sheet-type structured high and low surface area carbon sheets from petroleum coke (petcoke) for supercapacitor and lithium-ion capacitor applications (claimed) electrochemical performance greatly as it increase the electronic and ionic conductivity of porous carbon material. ADVANTAGE - This method provides graphene having characteristics of high specific surface area, good electrical conductivity and wettability.