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Effect of Dry Oxidation on the Performance of Carbon Nanotube Arrays Electrochemical Capacitors

Aria, Adrianus I. and Gharib, Morteza (2011) Effect of Dry Oxidation on the Performance of Carbon Nanotube Arrays Electrochemical Capacitors. In: Carbon Nanotubes, Graphene and Related Nanostructures. Materials Research Society Symposia Proceedings. No.1407. Materials Research Society , Warrendale, PA, pp. 129-134. ISBN 9781605113845.

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In this study, the effect of dry oxidation on the electrochemical properties of carbon nanotube arrays is investigated. Oxygenated surface functional groups were introduced to the arrays by oxygen plasma treatment, where their surface concentrations were varied by controlling the exposure time. The finding presented herein shows an augmentation of nearly thirty times in term of specific capacitance when the arrays are oxidized. Similar behavior is also observed in the non-aqueous electrolytes where the specific capacitance of the oxidized carbon nanotube arrays is measured more than three times higher than that of the pristine ones. However, overexposure to oxygen plasma treatment reverses this effect. At such high oxidation level, the damage to the graphitic structure becomes more pronounced such that the capacitive behavior of the arrays is overshadowed by their resistive behavior. These findings are important for further development of carbon nanotube based electrochemical capacitors.

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Additional Information:© 2012 Materials Research Society. This work was supported by The Office of Naval Research under grant number N00014-11-1-0031 and The Fletcher Jones Foundation under grant number 9900600. The authors gratefully acknowledge the Charyk Laboratory for Bioinspired Design, Kavli Nanoscience Institute (KNI) and the Molecular Materials Research Center (MMRC) at the California Institute of Technology for access to fabrication and characterization instruments. The authors also acknowledge Professor George Rossman at the Division of Geological and Planetary Sciences of the California Institute of Technology for access to the Raman spectrometer and Melanic Guittet for her valuable assistance in conducting the experiment.
Group:Kavli Nanoscience Institute, GALCIT
Funding AgencyGrant Number
Office of Naval Research (ONR)N00014-11-1-0031
Fletcher Jones Foundation9900600
Subject Keywords:energy storage; oxidation; C
Series Name:Materials Research Society Symposia Proceedings
Issue or Number:1407
Record Number:CaltechAUTHORS:20121121-082404053
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35594
Deposited By: Tony Diaz
Deposited On:21 Nov 2012 17:36
Last Modified:03 Oct 2019 04:29

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