Abstract
Transition metal dichalcogenides (TMDs) emerge as promising electrode materials for next‐generation electrochemical energy‐storage devices. In the present study, vanadium disulfide (VS2), an underexplored TMD, is investigated as an electrode material for supercapacitors. VS2 nanosheets are synthesized via a single‐step hydrothermal method at 220 °C for 24 h. Multiple characterization techniques, including Fourier‐transform infrared, Raman spectroscopy, scanning electron microscope–energy dispersive X‐ray analysis, and transmission electron microscope, confirm the formation of phase‐pure VS2 nanosheets with a hexagonal structure. The specific surface area, measured using Brunauer–Emmett–Teller analysis, is 12 m2 g−1. A specific capacitance of 106 F g−1 at a current density of 1 A g−1 is demonstrated using symmetric supercapacitors fabricated using these VS2 nanosheets. Using this device, an energy density of 34 Wh kg−1 at a power density of 800 W kg−1 is achieved. Moreover, the supercapacitor maintains 94% capacitance retention after 9000 charge–discharge cycles at 5 A g−1, highlighting the potential of VS2 nanosheets as efficient electrode materials for supercapacitor applications.
Published Version
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