Abstract
Ruthenium oxide was electrodeposited onto a carbon nanotube (CNT) film substrate with a three-dimensional porous structure at the nanometer scale. For comparison, ruthenium oxide was prepared on a Pt plate and carbon paper substrate. Microstructures of the ruthenium oxide-based electrodes examined by scanning and transmission electron microscopy showed that the ruthenium oxide layers (∼3 nm thickness) were electrochemically deposited on the surface of the multiwalled CNT. The ruthenium oxide on CNT film substrate showed not only a much higher specific capacitance of 1170 F/g, but also an improved rate capability, compared with the ruthenium oxide layers on a Pt plate and carbon paper substrate. The improved specific capacitance and rate capability of ruthenium oxide on CNT film substrate are attributed to its electrode construction comprising a very thin film of the electroactive material on a conductive CNT film substrate with a three-dimensional nanoporous structure.
Original language | English |
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Pages (from-to) | A2170-A2178 |
Journal | Journal of the Electrochemical Society |
Volume | 152 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2005 Jan 1 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry