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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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Author(s): Fenyong Deng | Beibei Li | Fenghua Lu | Yanqun Shao | Zhonghua Yi

Journal: Advances in Molecular Imaging
ISSN 2161-6728

Volume: 02;
Issue: 01;
Start page: 118;
Date: 2011;
Original page

Keywords: Specific Capacitance | Supercapacitor | RuO&lt | sub&gt | 2&lt | /sub&gt | -SnO&lt | sub&gt | 2&lt | /sub&gt | Electrode | Thermal Decomposition

ABSTRACT
Poorly crystalline Ru0.4Sn0.6O2 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.
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