▎ 摘　　要

NOVELTY - The capacitor has an electrolyte, a packaging shell and a capacitor core that are connected with each other, where the packaging shell is made of plastic or metal and the electrode is made of graphene and ruthenium oxide composite material. The electrolyte is contained sulfuric acid water solution. USE - Ultra capacitor. ADVANTAGE - The capacitor has high energy density. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for an ultra-capacitor preparing method.