Investigation on physicochemical, morphological, and electrochemical properties of MnMoO4 nanoparticles for supercapacitor applications

Manganese molybdate (MnMoO₄) has emerged as a promising electrode material for pseudocapacitors due to its better redox chemistry and structural stability. In this work, MnMoO4 nanoparticles were prepared by using a facile hydrothermal method for application as electrode materials in a supercapacitor. The structural characteristics was estimated from the XRD pattern, which evidences the monoclinic crystal structure of MnMoO4. FTIR analysis proved the presence of functional groups of MoO4. The FESEM and HRTEM investigations exhibited the homogeneous distribution of spherical structures of MnMoO4. An increase in reaction time led to a corresponding decrease in bandgap values. BET study found the surface area of MnMoO4 nanoparticles as 70 m2/g. The cyclic voltammetry results revealed that the occurrence of redox peaks confirmed the 24 hrs prepared MnMoO₄ electrode showed the pseudocapacitive nature and exhibited the specific capacitance value of 863 F/g, at a low scan rate of 5 mV/s. These results highlight MnMoO₄ as a viable and efficient candidate for high-performance energy-storage applications.