Wei-Chuan Fang et al 2007 Nanotechnology 18 485716 doi:10.1088/0957-4484/18/48/485716
Wei-Chuan Fang1,4, Kuei-Hsien Chen2 and Li-Chyong Chen3
Show affiliationsFast charging–discharging performances of well-dispersed RuO2 nanoparticles (NPs) on N-doped carbon nanotubes (CNTs) have been demonstrated. As regards the structural properties, the N 1s x-ray photoelectron spectroscopy spectrum shows two characteristic bonding peaks of N within CNTs. Cross-sectional scanning electron microscope images show that N-doped CNTs provide good support for uniform distribution of RuO2 NPs. As regards the capacitive behavior, N-doped CNTs covered with well-dispersed RuO2 NPs lead to a high charging–discharging property performed at the scan rate of 2000 mV s−1. The role of N doping is to create preferential sites of CNTs for capturing RuO2 NPs. Such a fast sweep capability established by the N-incorporation method is very useful in supercapacitor applications.
82.45.Yz Nanostructured materials in electrochemistry
61.72.S- Impurities in crystals
Condensed matter: electrical, magnetic and optical
Surfaces, interfaces and thin films
Condensed matter: structural, mechanical & thermal
Issue 48 (5 December 2007)
Received 22 August 2007, in final form 19 September 2007
Published 1 November 2007
Wei-Chuan Fang et al 2007 Nanotechnology 18 485716
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