Single-step hydrothermal strategy of hybrid ternary CuO/TiO2/rGO nanocomposites-unveiling the power of quasi-solid-state electrolyte with an enriched energy density for an asymmetric supercapacitor fabrication

In this present study, CuO/TiO2/rGO (CTG) hybrid ternary composite was synthesized via a single-step hydrothermal route for an asymmetric supercapacitor application. The PXRD pattern and XPS analysis confirms the formation of prepared ternary composites. As analyzed by FE-SEM and HR-TEM techniques, both CuO and TiO2 nanoparticles were anchored on the conducting two-dimensional rGO matrix, which facilitates efficient electron transport during electrochemical tests. From the electrochemical investigations, the CTG-2 composite revealed a high rise in capacitance value of 1077 Fg-1, overcoming the individual capacitance of CuO (173.4 Fg-1), TiO2 (206.2 Fg-1), rGO (269 Fg-1), and composite CTG-1 (690 Fg-1) at a current density of 1 Ag-1 with an unveiled remarkable capacitance performance of 88.4