Poorly Crystalline Ru_0.4Sn_0.6O₂ Nanocomposites Coated on Ti Substrate with High Pseudocapacitance for Electrochemical Supercapacitors

Yanqun Shao, Zhonghua Yi, Fenghua Lu, Fenyong Deng, Beibei Li

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DOI: 10.4236/aces.2012.21014                

Abstract

Poorly crystalline Ru_0.4Sn_0.6O₂ 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 H₂SO₄ electrolyte solution.

Keywords

Specific Capacitance; Supercapacitor; RuO₂-SnO₂; Electrode; Thermal Decomposition

Conflicts of Interest

The authors declare no conflicts of interest.

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