MOF-derived hierarchical FeCo3S4@graphitic carbon/rGO nanoarchitectures for high-energy and high-power supercapacitors

This research resource addresses the challenge of enhancing energy density in supercapacitors without compromising their inherent high power capability. The source paper reports the synthesis of a hierarchical FeCo3S4@graphitic carbon/reduced graphene oxide (Fe-Co-S@gC/rGO) hybrid nanocomposite via a metal-organic framework (MOF)-assisted solution-mediated assembly and a two-step thermal treatment. The resulting porous architecture integrates rGO, graphitic carbon, and cobalt sulfide-based nanostructures to optimize electrical conductivity and electrolyte accessibility. Electrochemical characterization in the paper demonstrates a high specific capacitance of 1827 F g^-1 at 0.5 A g^-1 for the optimized electrode. Furthermore, an asymmetric supercapacitor (ASC) utilizing the Fe-Co-S@gC/rGO composite as the positive electrode and rGO as the negative electrode achieved a specific

capacitance of 974.1 F g^-1 at 0.5 A g^-1, delivering an energy density of 541.2 Wh kg^-1 at a power density of 8213.4 W kg^-1, alongside durability over 12,000 charge-discharge cycles. For M.Tech researchers, this resource provides guidance on translating these experimental electrochemical parameters into equivalent circuit models and system-level simulations. This enables the evaluation of advanced hybrid energy storage systems (HESS) for renewable energy integration, focusing on charge-discharge kinetics, state-of-charge estimation, and degradation modeling.

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