Fabrication of Nd2S3 based rGO nanohybrid via hydrothermal route and evaluation of capacitive features toward supercapacitor application

Abstract

The two-dimensional metal sulphide acts as potent electrodes for supercapacitors; instead, they require further cycle stability and performance rate improvements before they can be used in real-world applications. Improved supercapacitor efficacy can be achieved by developing binder-free and hierarchical carbon nanohybrid electrode materials. Herein, we report the fabrication of a binder-free Nd2S3-based rGO nanohybrid electrode via the hydrothermal route for energy-saving equipment. Several analytical tools were used to determine the physiochemical features of the all-synthesized electrode materials. Several electrochemical tests, such as cyclic voltammetry and galvanostatic charge–discharge (GCD), were utilized to determine the pseudocapacitive nature of fabricated materials. The Cs from GCD of Nd2S3/reduced GO nanohybrid (782.46 F g−1) was greater than Nd2S3 (332.69 F g−1) and reduced GO (470.18 F g−1). Furthermore, the Nd2S3/reduced GO electrode shows excellent cyclic stability with a rate capability of 90 % over 5000th cycles. It facilitates the perfect connection for fast electrolyte ion diffusion between the electrolyte and electrode surface. Incorporating rGO into rare earth metal sulphide significantly enhances the capacitive characteristics of the electrode due to providing a larger surface area and enriching active zones. These findings suggest that supercapacitors may be constructed using binder-free Nd2S3/reduced GO electrodes, resulting in better electrochemical characteristics.