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Coatings 2017, 7(7), 100; doi:10.3390/coatings7070100

Electrodeposition of Vanadium Oxides at Room Temperature as Cathodes in Lithium-Ion Batteries

Mechanical Engineering Department, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece
Center of Materials Technology and Photonics, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece
Author to whom correspondence should be addressed.
Received: 8 June 2017 / Revised: 3 July 2017 / Accepted: 11 July 2017 / Published: 12 July 2017
(This article belongs to the Special Issue Thin Film Deposition and Characterization Techniques)
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Electrodeposition of vanadium pentoxide coatings was performed at room temperature and a short growth period of 15 min based on an alkaline solution of methanol and vanadyl (III) acetyl acetonate. All samples were characterized by X-ray diffraction, Raman spectroscopy, field-emission scanning electron microscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. The current density and electrolyte concentration were found to affect the characteristics of the as-grown coatings presenting enhanced crystallinity and porous structure at the highest values employed in both cases. The as-grown vanadium pentoxide at current density of 1.3 mA·cm−2 and electrolyte concentration of 0.5 M indicated the easiest charge transfer of Li+ across the vanadium pentoxide/electrolyte interface presenting a specific discharge capacity of 417 mAh·g−1, excellent capacitance retention of 95%, and coulombic efficiency of 94% after 1000 continuous Li+ intercalation/deintercalation scans. One may then suggest that this route is promising to prepare large area vanadium pentoxide electrodes with excellent stability and efficiency at very mild conditions. View Full-Text
Keywords: electrodeposition; V2O5; room temperature; electrochemical performance electrodeposition; V2O5; room temperature; electrochemical performance

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Rasoulis, M.; Vernardou, D. Electrodeposition of Vanadium Oxides at Room Temperature as Cathodes in Lithium-Ion Batteries. Coatings 2017, 7, 100.

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