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J. Korean Ceram. Soc. > Volume 42(7); 2005 > Article
Journal of the Korean Ceramic Society 2005;42(7): 509.
doi: https://doi.org/10.4191/kcers.2005.42.7.509
LSGM계 고체산화물 연료전지의 전해질-음극 사이의 계면안정성
김광년, 문주호1, 손지원2, 김주선2, 이해원2, 이종호2, 김병국2
한국과학기술원 재료연구부, 연세대학교 세라믹공학과
1연세대학교 세라믹공학과
2한국과학기술원 재료연구부
Interfacial Stability Between Anode and Electrolyte 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, KIST, School of Advanced Materials Engineering, Yonsei University
1School of Advanced Materials Engineering, Yonsei University
2Materials Division, KIST
ABSTRACT
Interfacial reactions at LSGM electrolyte and NiO-GDC anode interfaces were thoroughly investigated with Environmental Scanning Electron Microscopy (ESEM-PHlLIPS XL-30) and Energy Dispersive X-ray (EDX-Link XL30). According to the analysis, serious reaction zone was observed at LSGM/NiO-GDC interface. It was found that the reaction layer was originated from the chemical reaction between NiO and LSGM. The reaction products were identified as La deficient form of LSGM based perovskite and Ni-La-O compounds such as LaSrGa$_{3}$O$_{7}$ and LaNiO$_{3}$ from the X-Ray Diffraction (XRD, Philips) analysis. According to the electrical characterization, interfacial layer was very electrically resistive which would be the cause of high internal resistance and low power generating characteristic of the unit cell.
Key words: SOFC, LSGM, NiO, Interfacial reaction, Conductivity
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