Graphene oxide@Fe3o4@Tungstate modified ionic liquid as a novel electrode material for high- performance supercapacitor

In this study, using Fe3O4, graphene oxide (GO), Na2WO4, and ionic liquid (IL), GO@ Fe3O4-IL-W as a novel nanocomposite has been synthesized to obtain a high-performance super-capacitor. The morphologies and structures of materials have been characterized by Fourier-transform infrared (FT-IR) spectroscopy, thermal gravimetric analysis (TGA), X-ray diffraction (XRD), vibrating-sample magnetometer (VSM), scanning electron microscopy (FESEM), and energy diffraction X-ray (EDX) analysis. The behavior of electrochemical and supercapacitive nanocomposite has been investigated using cyclic voltammetry (CV), gal-vanostatic charge/discharge (GCD), and electrochemical impedance spectroscopy (EIS). The fabricated electrode material exhibited high specific capacitance (332.45 F/g at 0.2 A/g) and excellent electrochemical performance based on the cyclic stability (capacitance retention of 91.3% after 10,000 cycles). Furthermore, a symmetric supercapacitor device based on GO@ Fe3O4-IL-W was successfully assembled and an energy density of 7.38 Wh/kg at a power density of 40 W/kg has been obtained. Consequently, the GO@ Fe3O4-IL-W nano -composite electrode material is expected to be a promising material for supercapacitor applications and other energy devices. (c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

In this study, a novel nanocomposite GO@Fe3O4-IL-W was successfully synthesized for high-performance supercapacitors. The morphologies and structures of the materials were characterized using various techniques. The electrochemical behavior of the nanocomposite was investigated, and it exhibited high specific capacitance and excellent cyclic stability. Additionally, a symmetric supercapacitor device based on GO@Fe3O4-IL-W showed promising energy storage capabilities.