| LSGM계 고체산화물 연료전지의 계면안정성을 위한 완층층의 도입 |
| 김광년, 문주호1, 손지원2, 김주선2, 이해원2, 이종호2, 김병국2 |
한국과학기술연구원 재료연구부, 연세대학교 세라믹공학과
1연세대학교 세라믹공학과
2한국과학기술연구원 재료연구부 |
| Introduction of a Buffering Layer for the Interfacial Stability of LSGM-Based SOFCs |
| Kwang-Nyeon Kim, Jooho Moon1, Ji-Won Son2, Joosun Kim2, Hae-Weon Lee2, Jong-Ho Lee2, Byung-Kook Kim2 |
Materials Division, Korea Institute of 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 |
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| ABSTRACT |
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In order to find a proper buffering material which can prohibit an unwanted interfacial reaction between anode and electrolyte of LSGM-based SOFC, we examined a gadolinium doped ceria and scandium doped zirconia as a candidate. For this examination, we investigated the microstructural and phase stability of the interface under different buffering layer conditions. According to the investigation, ceria based material induced a serious La diffusion out of the LSGM electrolyte resulted in the formation of very resistive $LaSrGa_3O_7$ phase at the interface. On the other hand zirconia based material was directly reacted with LSGM electrolyte and thus produced very resistive reaction products such as $La_2Zr_2O_7,;Sr_2ZrO_4,;LaSrGaO_4;and;LaSrGa_3O_7$. From this study we found that an improper buffering material induced the higher internal cell resistance rather than an interfacial stability. |
| Key words:
SOFC, LSGM, GDC, ScSZ, Buffering layer, Interfacial reaction |
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