Nanostructured MoS/BiVO Composites for Energy Storage Applications.

We report the optimized synthesis and electrochemical characterization of a composite of few-layered nanostructured MoS along with an electroactive metal oxide BiVO. In comparison to pristine BiVO, and a composite of graphene/BiVO, the MoS/BiVO nanocomposite provides impressive values of charge storage with longer discharge times and improved cycling stability. Specific capacitance values of 610 Fg (170 mAhg) at 1 Ag and 166 Fg (46 mAhg) at 10 Ag were obtained for just 2.5 wt% MoS loaded BiVO. The results suggest that the explicitly synthesized small lateral-dimensioned MoS particles provide a notable capacitive component that helps augment the specific capacitance. We discuss the optimized synthesis of monoclinic BiVO, and few-layered nanostructured MoS. We report the discharge capacities and cycling performance of the MoS/BiVO nanocomposite using an aqueous electrolyte. The data obtained shows the MoS/BiVO nanocomposite to be a promising candidate for supercapacitor energy storage applications.