Comparative study of synthesis methods and electrochemical performance of nickel molybdate (NiMoO₄) nanostructures for supercapacitor applications

This study investigates the comparative synthesis methods and electrochemical performance of nickel molybdate (NiMoO₄) nanoparticles, focusing on their potential applications in supercapacitors. Nickel molybdate nanoparticles were synthesized using co-precipitation and microwave combustion methods. Comprehensive characterization techniques, including UV-DRS, XRD, FT-IR, PL, SEM, and TGA, were employed to analyse the structural, optical, morphology and thermal properties of the samples. Electrochemical evaluations revealed that the co-precipitated nanoparticles (NMCP) exhibited a specific capacitance of 168 F g⁻¹ at a current density of 1 A g^-1. In contrast, the microwave-combusted nanoparticles (NMMC) demonstrated superior performance with a specific capacitance of 224 F g⁻¹ at the 1 A g^-1 current density. These findings indicate that the microwave combustion method produces nickel molybdate nanoparticles with enhanced electrochemical performance, making them more suitable for high-performance supercapacitor applications.