Two-Dimensional Layered Heterostructures of Nanoporous Carbons Using Reduced Graphene Oxide and Metal–Organic Frameworks

Two-dimensional (2D) layered carbon heterostructures with controlled porosity and high graphitic degree have attracted considerable attention in recent years. They provide a crucial role in optimizing the overall performance of different devices in various applications. Here, we have introduced a practical approach utilizing reduced graphene oxide (rGO) and metal–organic framework (MOF) synergy to achieve 2D nanoporous highly graphitic carbons. These hybrid materials have been employed for supercapacitor application and have exhibited an ∼5-fold increase in capacitance (334 F g–1) compared to bare graphene oxide (GO) precursors. The symmetric supercapacitor device performance shows the highest specific energy of 17.6 Wh kg–1 and specific power of 25000 W kg–1 in an ionic liquid electrolyte (1-butyl-3-methylimidazolium tetrafluoroborate [bmim][BF4]). The high carbon content without any impurities provides a good retention of 97.24% up to 10000 cycles. This strategy provides a versatile route for developing various multilayered electrode materials on a large scale.