▎ 摘　　要

NOVELTY - The capacitor has a positive pole, a negative pole, a diaphragm, organic electrolyte, and shell. The active substance of the positive pole is made of graphene, and the negative pole is made of activated carbon. The organic electrolyte is composed of solvent such as acetonitrile (CH3CN), and solute such as bicyclic piperazine pyrryl quaternary ammonium tetrafluoroborate salt (SBPP-BF4). The diaphragm is made of polyethylene micro-porous film, or polypropylene micro-porous film or composite film or inorganic ceramic film, or paper or non-woven fabrics. USE - High-power double-electric layer capacitor. ADVANTAGE - The working voltage of the high-power double-electric layer capacitor can be improved by adopting the different active substances of the positive pole and the negative pole, and solute bicyclic piperidine-based quaternary ammonium tetrafluoroborate salt with very stable electro-chemical properties, and the working voltage can be improved from traditional 2.7V to 3.2V. Thus, the specific energy and the specific power of the capacitor can be improved efficiently, in which the specific energy can reach 8 Wh/kg, the specific power can reach 10000 W/kg, and the circulating service life can reach 1 million times.