High performance and remarkable cyclic stability of a nanostructured RGO–CNT-WO3 supercapacitor electrode |
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Authors: | Farah Nasreen Abdul Waheed Anwar Abdul Majeed Muhammad Ashfaq Ahmad Usman Ilyas Furqan Ahmad |
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Institution: | Department of Physics, University of Engineering and Technology, Lahore 548900 Pakistan.; Institute of Metal Research, Chinese Academy of Sciences, Shenyang China ; COMSATS Institute of Information and Technology, Lahore 54000 Pakistan ; Department of Metallurgical Engineering, University of Engineering and Technology, Lahore 548900 Pakistan |
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Abstract: | One of the most pressing concerns in today''s power networks is ensuring that consumers (both home and industrial) have access to efficient and long-lasting economic energy. Due to improved power accessibility and high specific capacitance without deterioration over long working times, supercapacitor-based energy storage systems can be a viable solution to this problem. So, here, tungsten trioxide (WO3) nanocomposites containing reduced graphene oxide and carbon nanotubes i.e. (RGO-WO3), (CNT-WO3), and (RGO–CNT-WO3), as well as pure WO3 nanostructures as electrode materials, were synthesized using a simple hydrothermal process. The monoclinic phase of WO3 with high diffraction peaks is visible in X-ray diffraction analysis, indicating good crystallinity of all electrode materials. Nanoflowers of WO3 were well-decorated on the RGO/CNTs conductive network in SEM micrographs. In a three-electrode system, the specific capacitance of the RGO–CNT-WO3 electrode is 691.38 F g−1 at 5 mV s−1 and 633.3 F g−1 at 2 A g−1, which is significantly higher than that of pure WO3 and other binary electrodes. Furthermore, at 2 A g−1, it achieves a coulombic efficiency of 98.4%. After 5000 cycles, RGO–CNT-WO3 retains 89.09% of its capacitance at 1000 mV s−1, indicating a promising rate capability and good cycling stability performance.One of the most pressing concerns in today''s power networks is ensuring that consumers (both home and industrial) have access to efficient and long-lasting economic energy. |
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