<p>In this work, the CuV₂O₆/GCN nanocomposite was synthesized using the hydrothermal technique. This nanocomposite is used as a supercapacitor’s electrode. Structural characterization using XRD and FTIR confirmed the crystallinity and the presence of functional groups. The BET analysis helps determine the total surface area, while SEM analysis reveals the surface morphology of CuV₂O₆, GCN, and CuV₂O₆/GCN. The incorporation of CuV₂O₆ between the GCN layers used as spacer significantly increases the BET surface area and enhances charge transfer across the electrode–electrolyte interface. The electrochemical performance of the proposed CuV₂O₆/GCN nanocomposite electrode-based supercapacitor was investigated in a 2&#xa0;M KOH electrolyte using electrochemical impedance spectroscopy (EIS), galvanostatic charge–discharge (GCD), and cyclic voltammetry (CV). At a current density of 1 A g⁻¹, the specific capacitance of CuV₂O₆/GCN in 2&#xa0;M KOH was found to be 1527 F g⁻¹. The CuV₂O₆/GCN electrode in KOH has average specific energy and specific power densities of 1057 and 3781 W kg⁻¹, respectively. EIS investigations verify that Rs value is 2.43 Ω for GCN, 1.92 Ω for CuV₂O₆, and 1.23 Ω for CuV₂O₆/GCN nanocomposites. The CuV₂O₆/GCN electrode material is therefore an additional option for the supercapacitor electrode material. The remarkable 83% cycle capacitance retention was also obtained after 2000 cycles. The outcomes demonstrate the CuV₂O₆/GCN electrode’s exceptional stability and efficient performance in supercapacitors.</p>