Hydrothermal preparation of reduced graphene oxide/tungsten trioxide nanocomposites with enhanced electrochemical performance
Document Type
Article
Publication Date
1-1-2017
Abstract
A series of rGO/WO3 nanocomposites have been synthesized in this study using the single-step hydrothermal approach by varying the concentration of WO3 for supercapacitor applications. Accordingly, the effect of different WO3 contents on the electrochemical performance of rGO/WO3 was extensively studied. It was noteworthy that rGO/WO3 nanocomposite with mass ratio of 1:100 showed the highest specific capacitance (i.e., 274 F g−1 at current density of 0.7 A g−1) at 150 °C with a reaction time of 20 h. By careful control of the synthesis parameters, rGO/WO3 with fibers-like structure could be obtained. Correspondingly, this structure can lower the resistance and shorten the diffusion pathway coupled with offering more reactive sites for electrolyte. A possible growth mechanism of WO3 deposited on rGO was also proposed in the presence work. Additionally, this piece of work also provided a better understanding the roles of fiber-like WO3 anchored on rGO/WO3 nanocomposites for efficient electrochemical capacitor.
Keywords
Diffusion pathways, Electrochemical capacitor, Electrochemical performance, Hydrothermal preparation, Reduced graphene oxides, Specific capacitance, Supercapacitor application, Synthesis parameters
Divisions
nanotechnology
Publication Title
Journal of Materials Science: Materials in Electronics
Volume
28
Issue
19
Publisher
Springer