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Carbon materials, especially carbon nanotubes (CNTs) and graphene (graphene) from domain because of its large Π key, thus has the very good electrical conductivity.Take graphene as an example. It refers to a sheet of graphite with a monatomic layer thickness, in which carbon atoms are hybridized by sp2 to form a honeycomb two-dimensional structure.The carbon-carbon bond length of graphene is 0.142 nm.Experiments show that the mobility of graphene the carrier at room temperature as high as 15000 s - 1 cm2 V - 1, its corresponding resistivity is 10-6 Ω cm.Resistivity is the lowest of all known materials.In addition, the theoretical specific surface area of graphene is as high as 2630 m2/g