Electrochemical Performance of a MoSe2/V2O5 Nanocomposite: A Promising Electrode Material for Supercapacitor Applications

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Abstract
Energy storage systems in the next generation face the challenge of developing efficient and durable electrodes for supercapacitors. In this study, a MoSe2/V2O5 nanocomposite was synthesized and systematically evaluated through a hydrothermal process. In a structural and spectroscopic study, it was found that the MoSe2 nanosheets successfully integrated with V2O5, leading to a reduced crystallite size of ~18 nm and a hierarchical porous morphology. The specific capacitance of hybrid electrodes was 50 Fg−1 at 0.75 Ag−1, which is almost double that of virgin MoSe2. At a current density of 3 Ag−1, it maintained more than 82% of its capacitance, exhibiting exceptional rate capability. The Ragone plots showed a decreased charge-transfer resistance (0.7) and an energy density of 4.57 Wh kg−1 at a power density of 0.088 W kg−1. After detailed study, it is concluded that the MoSe2/V2O5 nanocomposite could be a potential electrode material for high-performance supercapacitors because it combines high energy density with quick power delivery.

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