Capacitive properties of RuO2 and Ru-Co mixed oxide deposited on single-walled carbon nanotubes for high-performance supercapacitors

Authors

Chee O. Too, University of WollongongFollow
Gordon G. Wallace, University of WollongongFollow
Byung C. Kim, University of WollongongFollow
Jang Myoun Ko, Hanbat National University
Y I. Yoon, Hanbat National University, South Korea

RIS ID

32222

Publication Details

Kim, B. Chul., Wallace, G. G., Yoon, Y. I., Ko, J. & Too, C. O. (2009). Capacitive properties of RuO2 and Ru-Co mixed oxide deposited on single-walled carbon nanotubes for high-performance supercapacitors. Synthetic Metals, 159 (13), 1389-1392.

Abstract

Composite electrodes for use in redox supercapacitors were prepared by electrochemical deposition of RuO₂or the co-deposition of Ru–Co mixed oxides on the surface of single-walled carbon nanotubes. Electrodes coated with the Ru–Co mixed oxide [Ru (13.13 wt%) and Co (2.89 wt%)] or RuO₂, exhibited a similar specific capacitance (∼620 F g⁻¹) at low potential scan rates (10 mV s⁻¹). However, at higher scan rates (500 mV s⁻¹) the mixed metal oxide electrode showed superior performance (570 F g⁻¹) when compared to the RuO₂ electrode (475 F g⁻¹). This increase in capacitance at high scan rates is attributed to the role of the Co in providing enhanced electronic conduction.

Grant Number

ARC/FF0669110

Additional Grant Number

http://purl.org/au-research/grants/ARC/FF0669110