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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received January 9, 2001
Accepted March 8, 2001

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Discharge Capacitance of Electric Double Layer Capacitor with Electrodes Made of Carbon Nanotubes Directly Deposited on SUS304 Plates

Sang-Woong Lee^{1 2} Dal Keun Park^1† Joong Kee Lee¹ Jeh Beck Ju² Tae Won Sohn²

¹Clean Technology Research Center, Korea Institute of Science and Technology, PO Box, 131 Cheongryang, Seoul 136-791, Korea ²Dept. of Chem. Eng., Hongik University, Seoul 121-791, Korea

pdk93@kist.re.kr

Korean Journal of Chemical Engineering, May 2001, 18(3), 371-375(5), 10.1007/BF02699180

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Abstract

Carbon nanotubes were deposited directly on SUS304 plates by PECVD with acetylene and hydrogen as precursors under various deposition conditions. Raman spectroscopy showed that carbon nanotubes were not fully graphitized at the deposition temperatures, 600 to 750 ℃, although defects decreased with increase of deposition temperature. SEM microscopy showed that carbon nanotubes were not straight, but their growth followed the tip growth model. Pretreatment of the substrate such as polishing and dipping in HF solution was required for the successful deposition. Using non-aqueous electrolyte we fabricated electrical double layer capacitance (EDLC) with SUS304 plates, on which carbon nanotubes were deposited, without any treatment, and measured charge/discharge characteristics. Discharge capacitance decreased with cycles from initial value of 128 F/g, but stabilized at 58 F/g after 50 cycles.

Keywords

Carbon Nanotubes CVD EDLC Raman

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