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

Abstract

Two-dimensional\n(2D) layered carbon heterostructures with controlled\nporosity and high graphitic degree have attracted considerable attention\nin recent years. They provide a crucial role in optimizing the overall\nperformance of different devices in various applications. Here, we\nhave introduced a practical approach utilizing reduced graphene oxide\n(rGO) and metal–organic framework (MOF) synergy to achieve\n2D nanoporous highly graphitic carbons. These hybrid materials have\nbeen employed for supercapacitor application and have exhibited an\n∼5-fold increase in capacitance (334 F g^–1) compared to bare graphene oxide (GO) precursors. The symmetric\nsupercapacitor device performance shows the highest specific energy\nof 17.6 Wh kg^–1 and specific power of 25000 W kg^–1 in an ionic liquid electrolyte (1-butyl-3-methylimidazolium\ntetrafluoroborate [bmim]­[BF₄]). The high carbon content\nwithout any impurities provides a good retention of 97.24% up to 10000\ncycles. This strategy provides a versatile route for developing various\nmultilayered electrode materials on a large scale.