Ansari, Akhalakur Rahman and Ansari, Sajid Ali and Parveen, Nazish and Ansari, Mohammad Omaish and Osman, Zurina (2021) Silver nanoparticles embedded on reduced graphene oxide@copper oxide nanocomposite for high performance supercapacitor applications. Materials, 14 (17). ISSN 1996-1944, DOI https://doi.org/10.3390/ma14175032.
Full text not available from this repository.Abstract
In this work, silver (Ag) decorated reduced graphene oxide (rGO) coated with ultrafine CuO nanosheets (Ag-rGO@CuO) was prepared by the combination of a microwave-assisted hydrothermal route and a chemical methodology. The prepared Ag-rGO@CuO was characterized for its morphological features by field emission scanning electron microscopy and transmission electron microscopy while the structural characterization was performed by X-ray diffraction and Raman spectroscopy. Energy-dispersive X-ray analysis was undertaken to confirm the elemental composition. The electrochemical performance of prepared samples was studied by cyclic voltammetry and galvanostatic charge-discharge in a 2M KOH electrolyte solution. The CuO nanosheets provided excellent electrical conductivity and the rGO sheets provided a large surface area with good mesoporosity that increases electron and ion mobility during the redox process. Furthermore, the highly conductive Ag nanoparticles upon the rGO@CuO surface further enhanced electrochemical performance by providing extra channels for charge conduction. The ternary Ag-rGO@CuO nanocomposite shows a very high specific capacitance of 612.5 to 210 Fg(-1) compared against rGO@CuO which has a specific capacitance of 375 to 87.5 Fg(-1) and the CuO nanosheets with a specific capacitance of 113.75 to 87.5 Fg(-1) at current densities 0.5 and 7 Ag-1, respectively.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Uncontrolled Keywords: | Reduced graphene oxide; Metal; Metal oxide; Electrochemical devices |
| Subjects: | Q Science > Q Science (General) Q Science > QC Physics |
| Divisions: | Faculty of Science > Department of Physics |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 20 Jul 2022 02:28 |
| Last Modified: | 20 Jul 2022 02:28 |
| URI: | http://eprints.um.edu.my/id/eprint/28071 |
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