Synthesis of porous NiMoS4@Reduced graphene oxide hybrid composites for asymmetric supercapacitor applications

One of the biggest challenges remaining is the synthesis of a high specific capacitance supercapacitor material that is both economically feasible and efficient for use in electronics. In this instance, this study describes the synthesis of a NiMoS₄@rGO nanocomposite using a hydrothermal approach and annealing. A major factor in raising the specific capacitance of supercapacitors is the morphology of NiMoS₄@rGO. Generally speaking, a morphology with a thin electrolytic dielectric characteristic and a high surface area is essential. Galvanostatic charge–discharge (GCD) and cyclic voltammetry (CV) methods were used to analyze their electrochemical behavior of NiMoS₄@rGO electrodes. Due to its structure, the as-fabricated NiMoS₄@rGO electrode displays an impressive cyclic performance of 95% after 10,000 consecutive charge–discharge cycles in an aqueous 1 M KOH electrolyte on a three-electrode configuration, as well as a high specific capacity of 1910 Fg⁻¹ at 1 Ag⁻¹. Furthermore, with improved durability, the sandwiched NiMoO₄@rGO//Activated carbon asymmetric supercapacitor device demonstrated a sufficient energy density of 40.44 Whkg⁻¹at a power density of 780 Wkg⁻¹. The creation of electrodes with great potential for use in next-generation energy storage devices is greatly motivated by these electrochemical activities.