▎ 摘　　要

NOVELTY - The method involves forming graphite surface area. Filtering and drying processes of carboxyl graphene are performed. The carboxyl graphene is added to polar solvent i.e. distilled water. Ultrasonic dispersion of the carboxyl graphene is about 1 to 24h. Two current collectors are fixed in an electrolyte and respectively connected with a constant-voltage power supply anode and a constant-voltage power supply cathode. The current collectors are fixed into a muffle furnace at 500 to 1000 degrees centigrade for about 0.5 to 5h to obtain a graphite electrode sheet. USE - Graphene electrode sheet preparation method. ADVANTAGE - The method enables improving power density of an ultra-capacitor. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a graphene electrode sheet. DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram illustrating a graphene electrode sheet preparation method.'(Drawing includes non-English language text)'