Mascarenhas, F.J.Rodney, J.D.Mishra, P.Badekai Ramachandra, B.R.2026-02-042023Inorganic Chemistry Communications, 2023, 156, , pp. -13877003https://doi.org/10.1016/j.inoche.2023.111253https://idr.nitk.ac.in/handle/123456789/21686There is a requirement for the evolution of clean energy sources since the energy demand has exponentially increased. Therefore, substantial research is being implemented to efficiently convert renewable energy and capture it in energy storage devices. In this regard, fabricating unique, advanced, and potent supercapacitor materials has been laborious and demanding. Herein, we report a facile one-pot hydrothermal method for synthesizing copper selenide (Cu<inf>2</inf>Se)-graphene oxide (GO) nanocomposite. Among the various compositions developed, Cu<inf>2</inf>Se-5GO showed the highest specific capacitance of 219 F/g at 5 mV/s when used as an electrode material in a 2 M KOH solution. Also, the composition showed a capacitance retention of 90.6 % after 10,000 charge–discharge cycles. Therefore, the collective effect of copper selenide and graphene oxide has proved the material to be upsurging, accessible, and utilizable for prospective electrochemical energy storage devices. © 2023 Elsevier B.V.Copper selenideGraphene oxideHydrothermal methodNanocompositeSupercapacitor