A two-dimensional highly ordered mesoporous carbon/graphene nanocomposite for electrochemical double layer capacitors: effects of electrical and ionic conduction pathways

Abstract

A two-dimensional highly ordered mesoporous carbon/graphene nanocomposite (MCG) was synthesized by replicating a KIT-6/graphene nanocomposite. The MCG exhibited a high Brunauer–Emmett–Teller surface area of 1179 m² g⁻¹ and a large total pore volume of 0.94 cm³ g⁻¹. On account of its large surface area and high electrical conductivity with 2D morphology, MCG showed a very high specific capacitance of 276 F g⁻¹ at 1 A g⁻¹ and maintained 86% of initial capacitance at 100 A g⁻¹ in 1.0 M TEABF4/AN.