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Synthesis and Characterization of (Ru-Sn)O<sub>2</sub> Nanoparticles for Supercapacitors

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Author(s): Venkata Subba Reddy Channu | Rudolf Holze | Scott Ambrose Wicker Sr. | Edwin H. Walker Jr. | Quinton L. Williams | Rajamohan R. Kalluru

Journal: Materials Sciences and Applications
ISSN 2153-117X

Volume: 02;
Issue: 09;
Start page: 1175;
Date: 2011;
Original page

Keywords: Precipitation Synthesis | (Ru-Sn)O2 Nanocomposities | Supercapacitor

ABSTRACT
The electrode materials SnO2, RuO2 and (Sn-Ru)O2 were synthesized through precipitation method from SnCl2·2H2O and RuCl2·2H2O solutions. The obtained nano-sized pristine products were characterized using X-ray diffractometry, Scanning Electron Microscopy (SEM), differential scanning calorimetry (DSC)-thermogravimetric analysis (TGA) and cyclic voltammetry (CV). The Debye–Scherrer formula was used to estimate the average size of the nanoparticles SnO2 (36 nm), RuO2(24 nm), and (Sn-Ru)O2 (19 nm). Electrochemical studies were carried out to examine the capacitance of SnO2, RuO2, (Sn-Ru)O2 electrodes in 0.5 M H2SO4 at various scan rates. The estimated electrode capacitance was de-termined to decrease with an increase of scan rate.
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