Abstract
In this study, we investigated the thermodynamics and experimental performance of Al, Zr, and Ce species under anode and cathode gas conditions in Li/K carbonate at 650 °C. Among the Al, Zr, and Ce species investigated, we found that lithium aluminate (LiAlO 2), lithium zirconate (Li 2ZrO 3), and cerium/ceria oxide (CeO 2) were the most stable materials. Experimentally, we performed immersion tests in molten (Li 0.62/K 0.38) 2CO 3 at 650 °C to evaluate the phase and microstructure stabilities of these materials. The γ-LiAlO 2 phase transformation, determined using X-ray diffractometry, was dependent on the immersion time. We performed similar measurements for α-LiAlO 2, Li 2ZrO 3, and CeO 2 materials in molten Li/K carbonate at 650 °C. From immersion tests, the presence of the α-LiAlO 2 phase revealed that phase transformation of γ-LiAlO 2 occurs in Li/K carbonate melts under cathode gas atmospheres; in contrast, no phase transformation was evident after immersion of the pure α-LiAlO 2 phase in molten carbonate for 5,000 h. Furthermore, we found that Li 2ZrO 3 and CeO 2 were stable phases after immersion in molten carbonate at 650 °C, under both anode and cathode gas atmospheres, for more than 5,000 h.
| Original language | English |
|---|---|
| Pages (from-to) | 2557-2567 |
| Number of pages | 11 |
| Journal | Journal of Materials Science |
| Volume | 46 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2011 Apr 1 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Materials Science(all)
- Mechanics of Materials
- Mechanical Engineering
Cite this
Phase stabilities in molten Li/K carbonate of efficient matrix materials for molten carbonate fuel cells : Thermodynamic calculations and experimental investigations. / Patil, Kailash Yashvant; Yoon, Sung Pil; Han, Jonghee; Lim, Tae Hoon; Nam, SukWoo; Oh, In Hwan; Hong, Seong Ahn.
In: Journal of Materials Science, Vol. 46, No. 8, 01.04.2011, p. 2557-2567.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phase stabilities in molten Li/K carbonate of efficient matrix materials for molten carbonate fuel cells
T2 - Thermodynamic calculations and experimental investigations
AU - Patil, Kailash Yashvant
AU - Yoon, Sung Pil
AU - Han, Jonghee
AU - Lim, Tae Hoon
AU - Nam, SukWoo
AU - Oh, In Hwan
AU - Hong, Seong Ahn
PY - 2011/4/1
Y1 - 2011/4/1
N2 - In this study, we investigated the thermodynamics and experimental performance of Al, Zr, and Ce species under anode and cathode gas conditions in Li/K carbonate at 650 °C. Among the Al, Zr, and Ce species investigated, we found that lithium aluminate (LiAlO 2), lithium zirconate (Li 2ZrO 3), and cerium/ceria oxide (CeO 2) were the most stable materials. Experimentally, we performed immersion tests in molten (Li 0.62/K 0.38) 2CO 3 at 650 °C to evaluate the phase and microstructure stabilities of these materials. The γ-LiAlO 2 phase transformation, determined using X-ray diffractometry, was dependent on the immersion time. We performed similar measurements for α-LiAlO 2, Li 2ZrO 3, and CeO 2 materials in molten Li/K carbonate at 650 °C. From immersion tests, the presence of the α-LiAlO 2 phase revealed that phase transformation of γ-LiAlO 2 occurs in Li/K carbonate melts under cathode gas atmospheres; in contrast, no phase transformation was evident after immersion of the pure α-LiAlO 2 phase in molten carbonate for 5,000 h. Furthermore, we found that Li 2ZrO 3 and CeO 2 were stable phases after immersion in molten carbonate at 650 °C, under both anode and cathode gas atmospheres, for more than 5,000 h.
AB - In this study, we investigated the thermodynamics and experimental performance of Al, Zr, and Ce species under anode and cathode gas conditions in Li/K carbonate at 650 °C. Among the Al, Zr, and Ce species investigated, we found that lithium aluminate (LiAlO 2), lithium zirconate (Li 2ZrO 3), and cerium/ceria oxide (CeO 2) were the most stable materials. Experimentally, we performed immersion tests in molten (Li 0.62/K 0.38) 2CO 3 at 650 °C to evaluate the phase and microstructure stabilities of these materials. The γ-LiAlO 2 phase transformation, determined using X-ray diffractometry, was dependent on the immersion time. We performed similar measurements for α-LiAlO 2, Li 2ZrO 3, and CeO 2 materials in molten Li/K carbonate at 650 °C. From immersion tests, the presence of the α-LiAlO 2 phase revealed that phase transformation of γ-LiAlO 2 occurs in Li/K carbonate melts under cathode gas atmospheres; in contrast, no phase transformation was evident after immersion of the pure α-LiAlO 2 phase in molten carbonate for 5,000 h. Furthermore, we found that Li 2ZrO 3 and CeO 2 were stable phases after immersion in molten carbonate at 650 °C, under both anode and cathode gas atmospheres, for more than 5,000 h.
UR - http://www.scopus.com/inward/record.url?scp=79751529181&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79751529181&partnerID=8YFLogxK
U2 - 10.1007/s10853-010-5108-x
DO - 10.1007/s10853-010-5108-x
M3 - Article
VL - 46
SP - 2557
EP - 2567
JO - Journal of Materials Science
JF - Journal of Materials Science
SN - 0022-2461
IS - 8
ER -