Hydrothermally grown β-V₂O₅ electrode at 95°C.
The hydrothermal growth of crystalline β-V2O5 microstructures was performed on fluorine doped tin dioxide glass substrates using oxalic acid to adjust the pH of the solution for various deposition periods. It was observed that the sample grown for 48 h at pH 2 exhibited the best electrochemical response in terms of the highest specific charge and capacitance, being 772 C g(-1) and 386 F g(-1) respectively. The importance of achieving high crystalline quality samples and increased surface area toward the improvement of the electrochemical performance of β-V2O5 is highlighted.
Center of Materials Technology and Photonics, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece. Electronic address: dimitra@iesl.forth.gr.
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Vernardou
Department of Materials Science and Technology, University of Crete, 710 03 Heraklion, Crete, Greece.
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Apostolopoulou
Center of Materials Technology and Photonics, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece; Department of Physics, University of Crete, 710 03 Heraklion, Crete, Greece.
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Louloudakis
Center of Materials Technology and Photonics, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece; Institute of Electronic Structure and Laser, Foundation for Research & Technology, Hellas, P.O. Box 1527, Vassilika Vouton, 711 10 Heraklion, Crete, Greece; Electrical Engineering Department, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece.
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Katsarakis
Center of Materials Technology and Photonics, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece; Electrical Engineering Department, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece.
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Koudoumas
Ammonium metavanadate; Electrochemical evaluation; Hydrothermal growth; β-V(2)O(5)