Ultrathin graphene piece, apparatus for preparing ultrathin graphene pieces, method for preparing ultrathin graphene pieces, capacitor, and method of manufacturing capacitor

Abstract

The problem addressed by the present invention is to provide an apparatus for preparing ultrathin graphene pieces capable of preparing ultrathin graphene pieces in which less than 10 pieces of graphene are overlapped in large quantities, a method for preparing ultrathin graphene pieces capable of preparing the ultrathin graphene pieces with high yield, an ultrathin graphene piece in which less than 10 pieces of graphene are overlapped, a capacitor having high performance by using the ultrathin graphene piece as an electrode, and an efficient method of manufacturing the capacitor. The above-described problem can be solved by using an apparatusfor preparing ultrathin graphene pieces, the apparatus comprising: a graphite electrode; a counter electrodewhich is made of graphite, a corrosion resistant alloy, or a precious metal; an electrolytic solutionin which one end sides of the two electrodesandare immersed; a containerwhich stores the electrolytic solution; and a power sourcewhich is connected to the two electrodesandvia wiringsand. The apparatus is also provided with a porous filterso as to cover at least the immersed part of the graphite electrodethat is immersed in the electrolytic solution