These authors contributed equally.
Preparation and Characterization of Aligned Carbon Nanotube–Ruthenium Oxide Nanocomposites for Supercapacitors
Article first published online: 4 MAR 2005
Copyright © 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 1, Issue 5, pages 560–565, May 2005
How to Cite
Ye, J.-S., Cui, H., Liu, X., Lim, T., Zhang, W.-D. and Sheu, F.-S. (2005), Preparation and Characterization of Aligned Carbon Nanotube–Ruthenium Oxide Nanocomposites for Supercapacitors. Small, 1: 560–565. doi: 10.1002/smll.200400137
- Issue published online: 31 MAR 2005
- Article first published online: 4 MAR 2005
- Manuscript Received: 24 NOV 2004
- carbon nanotubes;
- electrochemical properties;
A novel type of ruthenium oxide (RuO2)-modified multi-walled carbon nanotube (MWNT) nanocomposite electrode (RuO2/MWNT) for supercapacitors has been prepared. The nanocomposites were formed by depositing Ru by magnetic-sputtering in an Ar/O2 atmosphere onto MWNTs, which were synthesized on Ta plates by chemical vapor deposition. Cyclic voltammetry, chronopotentiometry, and electrochemical impedance measurements were applied to investigate the performance of the RuO2/MWNT nanocomposite electrodes. The capacitance of the MWNT electrodes in 1.0 M H2SO4 is significantly increased from 0.35 to 16.94 mF cm−2by modification with RuO2. The RuO2 film on the surface of the nanotubes is composed of small crystal grains with tilted bundle-like microstructures, as observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The results demonstrate a promising route to prepare RuO2/MWNT-based double-layer supercapacitors.