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Open AccessArticle

Characterization of Transition-Metal Oxide Deposition on Carbon Electrodes of a Supercapacitor

1
Department of Electrical Engineering, National Sun Yat-Sen University, Kaohsiung 804, Taiwan
2
Department of Electrical Engineering, Cheng Shiu University, Kaohsiung 833, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Jiazhao Wang
Appl. Sci. 2016, 6(12), 413; https://doi.org/10.3390/app6120413
Received: 30 September 2016 / Revised: 2 December 2016 / Accepted: 5 December 2016 / Published: 7 December 2016
In order to fabricate the composite electrodes of a supercapacitor, transition-metal oxide materials NiO and WO3 were deposited on carbon electrodes by electron beam evaporation. The influences of various transition-metal oxides, scan rates of cyclic voltammograms (CVs), and galvanostatic charge/discharge tests on the characteristics of supercapacitor were studied. The charge/discharge efficiency and the lifetime of the composite electrodes were also investigated. It was found that the composite electrodes exhibited more favorable capacitance properties than those of the carbon electrodes at high scan rates. The results revealed the promotion of the capacitance property of the supercapacitor with composite electrode and the improving of the decay property in capacitance at high scan rate. In addition, the charge/discharge efficiency is close to 100% after 5000 cycles, and the composite electrode retains strong adhesion between the electrode material and the substrate. View Full-Text
Keywords: electron beam evaporation; composite electrode; supercapacitor; charge/discharge efficiency electron beam evaporation; composite electrode; supercapacitor; charge/discharge efficiency
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MDPI and ACS Style

Chen, Y.-C.; Wen, C.-Y.; Wang, C.-M.; Ho, C.-W.; Lin, S.-Y.; Chen, Y.-L. Characterization of Transition-Metal Oxide Deposition on Carbon Electrodes of a Supercapacitor. Appl. Sci. 2016, 6, 413.

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