Fabrication of niobium selenide-based rGO hybrid nanoparticles by hydrothermal method for supercapacitor applications

The innovative development of electrode materials and their application through compositing offers promising opportunities for advancing the efficiency of future energy storage devices (ESDs), particularly in high-efficiency supercapacitors (SCs). In this study, we examine the synthesis of electrode combinations consisting of NbSe2 (niobium diselenide) and reduced graphene oxide (rGO) for applications in supercapacitors. The successful integration of rGO and NbSe2 was confirmed by Raman analysis, which identifies characteristic peaks associated with both materials. The thermal stability of the electrode material was explained using thermogravimetric analysis (TGA). The electrochemical investigations reveal that the NbSe2/rGO composite illustrates improved electrochemical performance. The excellent specific capacitance (Csp) of 1512.15 F g−1, power density (Pd = 275.5 W kg−1) and energy density (Ed = 63.76 Wh Kg−1) at 1 A g−1 observed in galvanostatic charge-discharge (GCD) analysis. Furthermore, the long duration of cycling exhibits a notable level of stability (6000th) as observed by using the chronoamperometry technique. The NbSe2/rGO composite exhibits remarkable electrochemical performance and notable structural characteristics, making it a desirable candidate for application in supercapacitors (SCs).