| Home | E-Submission | Sitemap | Login | Contact Us |  
J. Korean Ceram. Soc. > Volume 48(1); 2011 > Article
Journal of the Korean Ceramic Society 2011;48(1): 110.
doi: https://doi.org/10.4191/kcers.2011.48.1.110
Electrical Properties in GDC (Gd2O3-Doped CeO2)/LSCF (La0.6Sr0.4Co0.2Fe0.8O3) Cathode Composites for Intermediate Temperature Solid Oxide Fuel Cells
Hong-Kyeong Lee, Jin-Ha Hwang
Department of Materials Science and Engineering, Hongik University
$Gd_2O_3$-doped $CeO_2$ (GDC) and $La_{0.6}Sr_{0.4}Co_{0.2}Fe_{0.8}O_3$ (LSCF) composite cathode materials were prepared in order to be applied to intermediate-temperature solid oxide fuel cells. The electrochemical polarization was evaluated using ac impedance spectroscopy involving geometric restriction at the interface between an ionic electrolyte and a mixed-conducting cathode. In order to optimize the cathode composites applicable to a GDC electrolyte, the cathode composites were evaluated in terms of polarization losses with regard to a given electrolyte, i.e., GDC electrolyte. The polarization increased significantly with decreasing temperature and was critically dependent on the compositions of the composite cathodes. The optimized cathode composite was found to consist of GDC 50 wt% and LSCF 50 wt%; the corresponding normalized polarization loss was calculated to be 0.64 at $650^{circ}C$.
Key words: Impedance spectroscopy, Solid oxide fuel cells, Electrodes, Polarization, GDC/LSCF cathode composites
Editorial Office
Meorijae Bldg., Suite # 403, 76, Bangbae-ro, Seocho-gu, Seoul 06704, Korea
TEL: +82-2-584-0185   FAX: +82-2-586-4582   E-mail: ceramic@kcers.or.kr
About |  Browse Articles |  Current Issue |  For Authors and Reviewers
Copyright © The Korean Ceramic Society. All rights reserved.                      developed in m2community