Single-pot microwave synthesis of MnMoO₄ nanorods electrode for cost-effective and sustainable supercapacitor application

In this study, manganese molybdate (MnMoO₄) nanorods were prepared using a single-pot low-cost microwave combustion method (MCM). The structural properties of MnMoO₄ nanorods were examined by powder X-ray diffraction (PXRD) analysis, Fourier transform-infrared (FTIR), and Raman spectroscopy. Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM) were used to analyse the formation of nanorod-structured morphologies. The elemental distribution, composition, and electronic configuration were confirmed using energy-dispersive X-ray spectrometer (EDS) and X-ray photoelectron spectrometer (XPS) analyses. Further, the electrochemical (EC) behaviour of MnMoO₄ nanorods were examined by cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques as coated electrodes in 1 M KOH aqueous electrolyte solution. It reveals significant specific capacitance (C_sp) of 505 F g⁻¹ at 0.5 A g⁻¹ and outstanding capacitive retention up to 87.2% after 5000 charge–discharge cycles at the current density (CD) of 8 A g⁻¹. These results of EC behaviour suggest that MnMoO₄ nanorod has a promising energy storage application.