Supercapacitor with highly conductive graphene foam electrode

摘要

A supercapacitor electrode comprising solid graphene foam impregnated with a liquid or gel electrolyte, wherein the solid graphene foam is composed of a plurality of pores and pore walls, the pore walls being essentially 0% non-carbon element Or a non-pure graphene material containing 0.001 wt% to 5 wt% of non-carbon element, and the non-pure graphene is formed of graphene oxide, reduced graphene oxide, graphene fluoride, chloride When selected from graphene, graphene bromide, graphene iodide, graphene hydride, nitrogenated graphene, chemically functionalized graphene, or combinations thereof, and the solid graphene foam is measured in a dry state without an electrolyte, 0 Physical density of .01 to 1.7 g / cm3, specific surface area of 50 to 3,200 m2 / g, unit Thermal conductivity of at least 200 W / mK heavy per and / or having a unit density per 2,000 S / cm or more electrical conductivity, supercapacitor electrodes. [Selection] Figure 3