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Improved EDLC Characteristics of the CNTs Grown on the Nanoporous Alumina Templates

Published online by Cambridge University Press:  03 September 2012

Sun Wen ,
Mi Jung ,
Oh-Shim Joo  and
Sun-il Mho
Sun Wen
Affiliation:
Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea
Mi Jung
Affiliation:
Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea
Oh-Shim Joo
Affiliation:
Korea Institute of Science and Technology, P.O.Box 131, Seoul 130-650, South Korea
Sun-il Mho
Affiliation:
Department of Molecular Science and Technology, Ajou University, Suwon 443-749, Korea
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Abstract

The specific capacitance of the carbon nanotube (CNT) electrode can be increased by using nanoporous alumina templates with the high pore density and the small and uniform pore diameter. The surface area of the CNTs was controlled and increased by preparing them with uniform diameters. The well-ordered nanoporous alumina templates were fabricated by a two-step anodization method. The cylindrical pore diameter, length, and density of the template utilized for the CNT growth was 53 ± 1 nm, 2 μm, and 3.1×1010 cm−2, respectively. The CNTs with uniform diameter of 44 ± 2 nm were grown on the porous alumina template as electrode materials for the electric double-layer capacitor (EDLC). The EDLC characteristic of the CNT electrodes was examined by measuring the capacitances from the cyclic voltammograms. The specific capacitance of the CNT electrodes can be increased to the value of 121 ± 5 F/g.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 822: Symposium S – Nanostructured Materials in Alternative Energy Devices , 2004 , S3.6
Copyright
Copyright © Materials Research Society 2004

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