Facile synthesis of ternary graphene oxide supported metal doped cobalt oxide nanostructures as an active electrode material for supercapacitor applications

We fabricated a nanostructured thin film electrode composed of graphene oxide-supported, metal-doped cobalt oxide, incorporating conducting transition metals oxides of Mn–Cu–Co mixed oxides. The resulting GO-supported Mn/Cu–Co₃O₄ composite exhibits potential for energy storage applications utilizes the cost-effective, and well-suited preparative methodology, offering a promising platform for high-performance supercapacitors comprises the novel seed layer deposition strategy on the nickel (Ni) substrate. The structure and morphological traits of the CuCo₂O₄/GO (CCG), MnCo₂O₄/GO (MCG), and MnCuCo₂O₄/GO (MCCG) thin films were systematically characterized by using various physicochemical (FT-IR, SEM-EDX, XRD, and AFM techniques) and electrochemical investigations, which includes cyclic voltammetry (CV), charge-discharge (CHDH) efficiency and EIS studies reveals the intrinsic properties of modified mixed oxide base electrodes. Cyclic voltammetric analysis revealed that MCG, CCG, and MCCG thin film electrodes achieved specific capacitances of 450, 500, and 850 F g⁻¹, respectively, at a scan rate of 2 mV/s. In addition, their charge-discharge capacitance (CHDH) was found to be 600, 500, and 823 F g⁻¹, highlighting the superior energy storage performance of the MCCG electrode. Among the other mixed oxide-based materials, MCCG based electrode exhibits stable specific capacitance over 500 charge-discharge performance utilizes the excellent cyclic stability and long-term energy storage system. EIS analysis investigates average specific capacitances of 500, 727, and 878 F g⁻¹ for, the CCG, MCG, and MCCG electrodes, respectively. The proposed synthesis approach is environmentally friendly and cost-effective, making it a promising strategy for the development and large-scale manufacturing of next-generation energy storage devices.