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http://dx.doi.org/10.4191/KCERS.2005.42.10.665

Effect of Interfacial Reaction Layer on the Electrochemical Performance of LSGM-Based SOFCs  

Kim, Kwang-Nyeon (Materials Division, Korea Institute f Science and Technology, School of Advanced Materials Engineering, Yonsei University)
Moon, Jooho (School of Advanced Materials Engineering, Yonsei University)
Kim, Hyoungchul (Materials Division, Korea Institute of Science and Technology)
Son, Ji-Won (Materials Division, Korea Institute of Science and Technology)
Kim, Joosun (Materials Division, Korea Institute of Science and Technology)
Lee, Hae-Weon (Materials Division, Korea Institute of Science and Technology)
Lee, Jong-Ho (Materials Division, Korea Institute of Science and Technology)
Kim, Byung-Kook (Materials Division, Korea Institute of Science and Technology)
Publication Information
Journal of the Korean Ceramic Society / v.42, no.10, 2005 , pp. 665-671 More about this Journal
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.
Keywords
SOFC; LSGM; Interfacial reaction; Open cell voltage; Ohmic resistance;
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Times Cited By KSCI : 1  (Citation Analysis)
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