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Abstract:
A amorphous/crystal mixed structural 36% RuO2-64% Ta2O5 coating was deposited on titanium substrate from ethanol ruthenium and tantalum chloride solution, using the thermal decomposition method at 300°C.Structure and electrochemical capacitive properties of the coating were investigated by means of X-ray diffraction(XRD), scanning electron microscopy(SEM), cyclic voltammetry(CV) and galvanostatic charge-discharge tests. The XRD results reveal the 36% RuO2-64% Ta2O5 coating presents amorphous structure with some nano-size crystallites in the amorphous matrix. The electrochemical analysis shows that the Ti/36% RuO2-64% Ta2O5 electrode exhibits typical capacitive characteristics and good power characteristics in 0.5 mol/L H2SO4 electrolyte. Its specific capacitance as single electrode is up to 525.5 and 495.1 F/g(RuO2) at a discharge current of 5 and 10 mA/cm2, respectively. Excellent cycling behavior is observed for this coating, with no loss in specific capacitance during 2000 cycles.
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Transactions of Materials and Heat Treatment
ISSN: 1009-6264
CN: 11-4545/TG
Year: 2012
Issue: 7
Volume: 33
Page: 122-126
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 2
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