Sonochemical synthesis of Ag2WO4/RGO-based nanocomposite as a potential material for supercapacitors electrodes

The goal of this research is to synthesize a reduced graphene oxide/silver tungstate (Ag2WO4/RGO)-based nanocomposite by the incorporation of the Ag2WO4 nanoparticles into the RGO nanosheets through sonochemical method. The structural, chemical, and morphological properties of the prepared Ag2WO4/RGO nanocomposite were characterized by field emission scanning electron microscopy (FE-SEM), Fourier transforminfrared spectroscopy (FT-IR), and X-ray diffraction (XRD) methods. The Ag2WO4/RGO nanocomposite was utilized as an efficient modifier for the supercapacitor electrodes. The electrochemical performance of Ag2WO4/ RGO-based electrodes was investigated in 2 M H2SO4 solution by the electrochemical techniques such as continuous cyclic voltammetry (CCV), cyclic voltammetry (CV), galvanostatic charge/discharge, and electrochemical impedance spectroscopy (EIS). The Ag2WO4/RGO-based electrodes presented a specific capacitance of 534 F/g at the scan rate of 5 mV/s and energy density of 68 Wh/kg. CCV assessments of Ag2WO4/RGO-based electrodes showed exceptional cyclic stability (retention of 102.1% of its primary specific capacitance after 5000 cycles) and mechanical stability. The outstanding performance of the Ag2WO4/RGO nanocomposite revealed that it possesses the merits of both of Ag2WO4 nanoparticles and RGO nanosheets and confirms its suitability for the construction of the supercapacitors.

Automated summary

The goal of this research was to synthesize an Ag2WO4/RGO nanocomposite through sonochemical method and investigate its electrochemical performance for supercapacitor electrodes. The Ag2WO4/RGO-based electrodes exhibited high specific capacitance, energy density, excellent cyclic stability, and mechanical stability, making it a promising material for supercapacitor construction.