Silver nanoparticles decorated on a three-dimensional graphene scaffold for electrochemical applications |
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| Authors: | A. Bello M. Fabiane D. Dodoo-Arhin K.I. Ozoemena N. Manyala |
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| Affiliation: | 1. Department of Physics, Institute of Applied Materials, SARChI Chair in Carbon Technology and Materials, University of Pretoria, Pretoria 0002, South Africa;2. Council for Scientific and Industrial Research, Meiring Naude Road, Brummeria, PO Box 395, Pretoria 0001, South Africa;3. Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa |
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| Abstract: | Silver metal nanoparticles were decorated by electron beam evaporation on graphene foam (GF) grown by chemical vapour deposition. X-ray diffraction, Raman spectroscopy, scanning and transmission electron microscopy, and atomic force microscopy were used to investigate the structure and morphology of the graphene foam/silver nanoparticles (GF/Ag). Both samples were tested as electrodes for supercapacitors. The GF/Ag exhibited a significantly higher capacitive performance, including a specific capacitance value of (~110 Fg−1) and excellent cyclability in a three-electrode electrochemical cell. These results demonstrate that graphene foam could be an excellent platform for metal particles for investigating improved electrochemical performance. |
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| Keywords: | Graphene foam CVD Electron beam evaporation Silver nanoparticles Electrochemical capacitor |
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