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

• AMO NRGO nanocomposites were prepared via hydrothermal method for an asymmetric supercapacitor. • The electrochemical studies shows that the AMO NRGO (II) nanocomposites has high specific capacitance of 648 Fg -1 at 1 Ag -1 using a Ni foam substrate in 3 M KOH. After 5000 cycles, it retained 91 % of its capacitance. • The asymmetric capacitor of AMO NRGO || AC exhibited high energy and power density, along with outstanding cycle stability, retaining 85 % capacitance of its initial performance after 5000 cycles. 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 Ag 2 MoO 4 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 AMO NRGO composite materials exhibited the pebble stone-like structure of Ag 2 MoO 4 on the NRGO surface, observed by FESEM techniques. At 1 Ag -1 , the Ni foam coated with the AMO NRGO (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 AMO NRGO (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 AMO NRGO electrodes exhibit promising electrochemical performance for the supercapacitor application. Graphical abstract on AMO NRGO electrodes