▎ 摘　　要

NOVELTY - A porous graphene electrode comprises 80-100 pts. wt. graphite powder, 10-20 pts. wt. concentrated sulfuric acid, 20-40 pts. wt. potassium sulfate, 10-15 pts. wt. phosphorus pentoxide, 10-25 pts. wt. of 5% hydrochloric acid and 100 pts. wt. deionized water. USE - Porous graphene electrode. ADVANTAGE - The electrode has larger specific surface area, higher specific capacitance and high activity. The method has simple operation steps. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the porous graphene electrode comprising orderly adding concentrated sulfuric acid, potassium sulfate and phosphorus pentoxide into round bottom flask, uniformly stirring, adding deionized water and stirring in water bath at 30-40 degrees C for 1-3 hours; dissolving, slowly adding graphite powder into water bath, continuously stirring and reacting for 2-10 hours, lifting flask from oil bath and naturally cooling to room temperature; pouring reactant in round bottom flask into 1-2 L big beaker, slowly adding 200-200 mL deionized water to dilute, putting in ventilation cabinet, standing for 12-48 hours, layering mixture, pouring supernatant, filtering, washing until neutral, centrifuging and vacuum-drying at 60-80 degrees C to obtain graphene oxide; dispersing graphene oxide in water, centrifuging and ultrasonically dispersing to obtain graphene oxide dispersion liquid; printing graphene oxide dispersion liquid in preset substrate into electrode and drying; washing with deionized water and drying; and placing film in sealed container for reducing, washing with water and drying.