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J. Korean Ceram. Soc. > Volume 42(10); 2005 > Article
Journal of the Korean Ceramic Society 2005;42(10): 665.
doi: https://doi.org/10.4191/kcers.2005.42.10.665
LSGM계 고체산화물 연료전지의 전기화학적 성능에 미치는 계면반응층의 영향
김광년, 문주호1, 김형철2, 손지원2, 김주선2, 이해원2, 이종호2, 김병국2
한국과학기술연구원 재료연구부, 연세대학교 세라믹공학과
1연세대학교 세라믹공학과
2한국과학기술연구원 재료연구부
Effect of Interfacial Reaction Layer on the Electrochemical Performance of LSGM-Based SOFCs
Kwang-Nyeon Kim, Jooho Moon1, Hyoungchul Kim2, Ji-Won Son2, Joosun Kim2, Hae-Weon Lee2, Jong-Ho Lee2, Byung-Kook Kim2
Materials Division, Korea Institute f Science and Technology, School of Advanced Materials Engineering, Yonsei University
1School of Advanced Materials Engineering, Yonsei University
2Materials Division, Korea Institute of Science and Technology
ABSTRACT
LSGM is known to show very serious interfacial reaction with other unit cell components, such as electrode, electrode functional or buffering layers. Especially, the formation of very resistive LaSr$Ga_{3}$$O_{7}$ phase at the interface of an anode and an electrolyte is the most problematic one in LSGM-based SOFCs. In this study, we investigated the interfacial reactions in LSGM-based SOFCs under different unit cell configurations. According to the microstructural analysis on the interfacial layer between an electrolyte and its neighboring component, serious interfacial reaction zone was observed. From the electrical and electrochemical characterization of the cell, we found such an interfacial reaction zone not only increased the internal ohmic resistance but also decreased the OCV(Open Cell Voltage) of the unit cell, and thus consequently deteriorated the unit cell performance.
Key words: SOFC, LSGM, Interfacial reaction, Open cell voltage, Ohmic resistance
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