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Poorly Crystalline Ru<sub>0.4</sub>Sn<sub>0.6</sub>O<sub>2</sub> Nanocomposites Coated on Ti Substrate with High Pseudocapacitance for Electrochemical Supercapacitors
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Advances in Chemical Engineering and Science·Volume 02 (2011)·Pages 118–122·Published 3 November 2011·DOI10.4236/aces.2012.21014
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Abstract
Poorly crystalline Ru 0.4 Sn 0.6 O 2 solid solution with size about 2 nm coated on Ti substrate was prepared by thermal decomposition at 260°C. The electrodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) for structural and morphological studies. The Capacitance properties of the electrodes were tested by cyclic voltammetry and charge-discharge tests. The results show that the electrodes have mud-cracks structure with cracks 0.2 μm in width. The electrode has stable electrochemical capacitor properties with a maximum specific capacitance of 648 F/g within a scan potential window –0.1 - 1.0 V in 0.5 M H 2 SO 4 electrolyte solution.
KeywordsSpecific CapacitanceSupercapacitorRuO<sub>2</sub>-SnO<sub>2</sub>ElectrodeThermal Decomposition
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