Cathode properties of (LSCM) perovskite oxides were investigated for their application to metal-supported solid oxide fuel cells (SOFCs). (LSCM-8246) had the lowest impedance on (YSZ) electrolyte among various compositions because the properties of the cathodic reaction kinetics, thermal expansion compatibility, and chemical reactivity were optimized. A (CGO) interlayer was introduced between LSCM and YSZ to inhibit the formation of resistive phases at the interface. The cathode impedance was decreased to about 1/3 of the noninterlayer samples. The study of the partial oxygen pressure dependence and activation energy of LSCM-8246 on CGO-layered YSZ showed that the ionization of the adsorbed oxygen is the rate-determining step of the cathode reaction at the general operation condition of SOFCs. Metal-supported single cell SOFCs with LSCM-8246 cathode were fabricated and characterized. The single cell impedance was much greater than values expected from the half cell test because the cathode in the single cell was sintered in situ during the measurement. The effect of cathode sintering was observed by measuring the current-voltage curves and impedance spectra with time.
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e-mail: leecb@poscopower.co.kr
e-mail: jmbae@kaist.ac.kr
e-mail: kaist77@kaist.ac.kr
e-mail: baeksw77@kaist.ac.kr
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April 2010
This article was originally published in
Journal of Fuel Cell Science and Technology
Research Papers
Cathode and Its Application to Metal-Supported Solid Oxide Fuel Cells
Changbo Lee,
Changbo Lee
Department of Research and Development, Fuel Cell Division,
e-mail: leecb@poscopower.co.kr
POSCO Power Corporation
, No. 13-9 Jukcheon-Ri, Hunghae-Eup, Buk-Gu, Pohang 791-941, Republic of Korea
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Joongmyeon Bae,
Joongmyeon Bae
Department of Mechanical Engineering,
e-mail: jmbae@kaist.ac.kr
Korea Advanced Institute of Science and Technology
, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Korea
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Jung Hyun Kim,
Jung Hyun Kim
Department of Mechanical Engineering,
e-mail: kaist77@kaist.ac.kr
Korea Advanced Institute of Science and Technology
, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Korea
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Seung-Wook Baek
Seung-Wook Baek
Department of Mechanical Engineering,
e-mail: baeksw77@kaist.ac.kr
Korea Advanced Institute of Science and Technology
, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Korea
Search for other works by this author on:
Changbo Lee
Department of Research and Development, Fuel Cell Division,
POSCO Power Corporation
, No. 13-9 Jukcheon-Ri, Hunghae-Eup, Buk-Gu, Pohang 791-941, Republic of Koreae-mail: leecb@poscopower.co.kr
Joongmyeon Bae
Department of Mechanical Engineering,
Korea Advanced Institute of Science and Technology
, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Koreae-mail: jmbae@kaist.ac.kr
Jung Hyun Kim
Department of Mechanical Engineering,
Korea Advanced Institute of Science and Technology
, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Koreae-mail: kaist77@kaist.ac.kr
Seung-Wook Baek
Department of Mechanical Engineering,
Korea Advanced Institute of Science and Technology
, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, Republic of Koreae-mail: baeksw77@kaist.ac.kr
J. Fuel Cell Sci. Technol. Apr 2010, 7(2): 021022 (8 pages)
Published Online: January 25, 2010
Article history
Received:
June 6, 2008
Revised:
December 16, 2008
Online:
January 25, 2010
Published:
January 25, 2010
Citation
Lee, C., Bae, J., Kim, J. H., and Baek, S. (January 25, 2010). " Cathode and Its Application to Metal-Supported Solid Oxide Fuel Cells." ASME. J. Fuel Cell Sci. Technol. April 2010; 7(2): 021022. https://doi.org/10.1115/1.3182738
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