Anchoration of hydrothermally developed FeSe nanoparticles on rGO nanosheets as electrode for energy storage devices

Abstract

A perpetual discrepancy exists between demand and supply due to the inherent fluctuation of renewable energy sources. A possible approach for addressing this persistent issue involves the advancement of appropriate materials for consumption in energy storage systems. An example of a device that can potentially serve as energy storage is a supercapacitor equipped with highly effective electrode materials. This study synthesizes FeSe, rGO and FeSe@rGO electrodes via hydrothermal route. Specific capacitance (Cs) of FeSe, rGO and FeSe@rGO electrode was measured by GCD analysis as 517, 799, and 1408 F g−1 at 1 A g−1. The synthesized FeSe@rGO nanohybrid exhibits outstanding performance and high cycling stability up to 10000th cycles. Furthermore, the enhanced supercapacitance of the nanohybrid has been ascribed to the synergistic interaction between FeSe and rGO, which delivers higher surface area and enhanced active sites. Further, symmetric two-electrode study revealed excellent electrode material with specific capacitance (Cs) of 553 at 1 A g−1 with capacitive retention of 66.36 % after 1000th cycle. However, the electrochemical investigation demonstrated that the FeSe@rGO nanohybrid structure exhibited superior performance and could be used in different electrochemical applications.