Exceptional Cyclic Stability and Performance Characteristics of a Nanostructured rGO–CNT-WO3 Supercapacitor Electrode
J. Environ. Nanotechnol., Volume 13, No 4 (2024) pp. 341-350
Abstract
This study investigated the WO3-rGO hybrid, a material with great potential as a supercapacitor electrode. This material was produced using a straightforward one-pot hydrothermal synthesis process. A range of analytical techniques including X-ray diffraction, Raman spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller analysis were used to investigate the structural, morphological, compositional, and surface properties of the prepared materials. The improvement in electrochemical supercapacitive qualities was assessed by comparing pure hexagonal phased WO3 with different hybrids, which varied based on the concentration of rGO added to it. This evaluation was conducted using cyclic voltammetry, galvanostatic charge/discharge, and electrochemical impedance spectroscopy. The WO3@rGO(1:5) composite demonstrated a significant increase in capacitance value, reaching 948 F/g. This surpassed the individual capacitance values of rGO (71.11 F/g) and WO3 (94.22 F/g) at a current density of 4 A/g. Furthermore, the WO3@rGO(1:5) composite exhibited excellent cycling stability, maintaining 95% of its initial capacitance across 10000 cycles, indicating a promising rate capability and good cycling stability performance.
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