Hydrothermally prepared Ag2MoO4 nanoparticles anchored on nitrogen doped rGO for asymmetric supercapacitor application

Abstract

The energy density and the specific capacitance are two important parameters for improving energy storage devices. In this study, we introduce the novel incorporation of nitrogen-doped reduced graphene oxide (NRGO) into Ag₂MoO₄ nanoparticles, for use in asymmetric supercapacitor applications. The synthesized compounds were confirmed and characterized using structural, functional, nitrogen adsorption-desorption, surface, elemental analyses, and electrochemical properties. Here, the AMONRGO composite materials exhibited the pebble stone-like structure of Ag₂MoO₄ on the NRGO surface, observed by FESEM techniques. At 1 Ag^-1, the Ni foam coated with the AMONRGO (II) nanocomposite demonstrates a good C_sp of 648 Fg^-1. It displayed retention of 91 % of its initial capacitance over 5000 charge/discharge cycles. In an asymmetric supercapacitor (ASC) device, the electrodes of AMONRGO (II) || AC demonstrated an exceptional energy density (E_d) of 44.13 Whkg^-1 at a discharge rate (597.79 Wkg^-1). The results suggest that the AMONRGO electrodes exhibit promising electrochemical performance for the supercapacitor application.