Nanostructured Na-doped vanadium oxide synthesized using an anodic deposition technique for supercapacitor applications

► Na-doped vanadium oxide is successfully prepared by an electrodeposition technique. ► Microstructure and Na content of the oxide are controlled by deposition potential. ► A lower deposition potential leads to a higher porosity of the prepared oxide. ► Na doping significantly increases the oxide ca...

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Bibliographic Details
Published in:Journal of alloys and compounds 2012-09, Vol.536 (SUPPL.1), p.S428-S431
Main Authors: Lai, Chun-Hung, Lin, Chung-Kwei, Lee, Sheng-Wei, Li, Hui-Ying, Chang, Jeng-Kuei, Deng, Ming-Jay
Format: Article
Language:English
Subjects:
Anodic
Anodic deposition
Applied sciences
Capacitors
Cross-disciplinary physics: materials science
rheology
Deposition
Electrodeposition, electroplating
Electrodes
Electronics
Exact sciences and technology
Materials
Materials science
Methods of deposition of films and coatings
film growth and epitaxy
Na doping
Nano-structure
Nanocrystals
Oxides
Physics
Scanning electron microscopy
Supercapacitor
Supercapacitors
Vanadium oxide
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Summary:► Na-doped vanadium oxide is successfully prepared by an electrodeposition technique. ► Microstructure and Na content of the oxide are controlled by deposition potential. ► A lower deposition potential leads to a higher porosity of the prepared oxide. ► Na doping significantly increases the oxide capacitance. ► The nanostructured Na-doped oxide shows an ideal supercapacitor performance. Vanadium-based oxides are prepared on graphite substrates by an anodic deposition technique. The plating bath is 0.2M VOSO4 solution with NaCH3COO addition. A scanning electron microscope and an X-ray diffractometer are used to characterize the deposits; the analyses indicate that the porous Na-doped V2O5 electrodes with a nano-crystalline nature are obtained. Supercapacitor properties of the oxide electrodes are studied using cyclic voltammetry in KCl aqueous electrolyte. The data show that the deposited oxides can exhibit ideal capacitive behavior over a potential range of 1V; the optimum specific capacitance is ∼180F/g. A lower deposition potential leads to a higher porosity of the oxide, resulting in a better high-rate supercapacitor performance of the electrode.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2011.12.038