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Electrochemical Characterization of Single-Walled Carbon Nanotube Electrodes
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Electrochemical Characterization of Single-Walled Carbon Nanotube Electrodes
Electrochemical Characterization of Single-Walled Carbon Nanotube Electrodes
JB
Joseph N. Barisci
Joseph N. Barisci
Gordon G. Wallace
Gordon G. Wallace
Ray H. Baughman
Ray H. Baughman
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1 January 2000
journal article
Published by
The Electrochemical Society
in
Journal of the Electrochemical Society
Vol. 147
(12)
,
4580-4583
https://doi.org/10.1149/1.1394104
Abstract
The cyclic voltammetric responses and capacitive behavior of single‐walled carbon nanotube sheets or papers are described. Broad redox responses have been observed in aqueous solutions that are probably due to the presence of oxygen‐containing groups bound to the surface of the nanotubes or to the impurities produced during nanotube purification. The voltammetry and capacitance of the nanotube paper do not vary significantly when the chemical nature of the electrolyte ions is changed. In nonaqueous media, no redox responses are produced except in solutions of , where an intense reduction response, possibly due to lithium insertion into the nanotube bundles, is observed. Electrochemical impedance spectroscopy in aqueous solutions reveals the typical features associated with a porous material. Electrochemical quartz crystal microbalance studies in both aqueous and nonaqueous electrolytes show that the mass of the nanotube film increases as the potential is made more negative. These mass changes are affected by, but are not directly proportional to, the cation mass. In acetonitrile solutions of , a significant increase in mass associated with the suggested insertion of the cation is observed. © 2000 The Electrochemical Society. All rights reserved.
Keywords
POROUS MATERIAL
CARBON NANOTUBE
QUARTZ
REDOX RESPONSES
ACETONITRILE
PURIFICATION
ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY
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Cited by 138 articles