한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제42권10호
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  • Pages.665-671
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  • 2005
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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LSGM계 고체산화물 연료전지의 전기화학적 성능에 미치는 계면반응층의 영향

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

  • 김광년 (한국과학기술연구원 재료연구부, 연세대학교 세라믹공학과) ;
  • 문주호 (연세대학교 세라믹공학과) ;
  • 김형철 (한국과학기술연구원 재료연구부) ;
  • 손지원 (한국과학기술연구원 재료연구부) ;
  • 김주선 (한국과학기술연구원 재료연구부) ;
  • 이해원 (한국과학기술연구원 재료연구부) ;
  • 이종호 (한국과학기술연구원 재료연구부) ;
  • 김병국 (한국과학기술연구원 재료연구부)
  • 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)
  • 발행 : 2005.10.01
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초록

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.

키워드

참고문헌

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