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Journal of Nanomaterials
Volume 2014, Article ID 132032, 6 pages
http://dx.doi.org/10.1155/2014/132032
Research Article

Liquid Phase Plasma Synthesis of Iron Oxide/Carbon Composite as Dielectric Material for Capacitor

1Department of Environmental Engineering, Sunchon National University, Suncheon 540-742, Republic of Korea
2Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747, Republic of Korea
3School of Environmental Engineering, University of Seoul, Seoul 130-743, Republic of Korea
4Korea Institute of Carbon Convergence Technology, Jeonju 561-844, Republic of Korea

Received 8 February 2014; Accepted 16 June 2014; Published 25 June 2014

Academic Editor: Anukorn Phuruangrat

Copyright © 2014 Heon Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Iron oxide/carbon composite was synthesized using a liquid phase plasma process to be used as the electrode of supercapacitor. Spherical iron oxide nanoparticles with the size of 5~10 nm were dispersed uniformly on carbon powder surface. The specific capacitance of the composite increased with increasing quantity of iron oxide precipitate on the carbon powder up to a certain quantity. When the quantity of the iron oxide precipitate exceeds the threshold, however, the specific capacitance was rather reduced by the addition of precipitate. The iron oxide/carbon composite containing an optimum quantity (0.33 atomic %) of iron oxide precipitate exhibited the smallest resistance and the largest initial resistance slope.