Synthesis, and structural characterization of FeMoO4/r-GO nanocomposite as an electrode material for energy storage application

Abstract

Improving the energy density of electrochemical supercapacitors requires the urgent development of novel electroactive materials. Metal molybdate-based nanostructures are promising candidates as effective electrode materials for the next generation of energy storage solutions. In the present work, a FeMoO₄/r-GO nanocomposite was synthesized via the hydrothermal method and used as anode material for supercapacitor application. The structural, and topographical properties were investigated by XRD, FE-SEM, and TEM analysis. Field Emission Scanning Electron Microscopy (FE-SEM) and Transmission electron microscope (TEM) images of FeMoO₄/reduced graphene oxide (r-GO) composites show an irregular, rod-like structure coated with r-GO sheets. The FeMoO₄/r-GO nanocomposite electrode material exhibited a remarkable specific capacitance of 240 F/g at the current density of 1 A/g, which is significantly higher than the 167 F/g capacitance of pure FeMoO₄. The continued charge–discharge (GCD) (5,000) life cycle performance of FeMoO₄/r-GO was the retention and coulombic efficiency of 90 % to 86 % after 10 A/g.