Phase stabilities in molten Li/K carbonate of efficient matrix materials for molten carbonate fuel cells: thermodynamic calculations and experimental investigations
DC Field | Value | Language |
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dc.contributor.author | Hong Seong Ahn | - |
dc.contributor.author | SukWoo Nam | - |
dc.date.accessioned | 2021-09-03T09:59:00Z | - |
dc.date.available | 2021-09-03T09:59:00Z | - |
dc.date.created | 2021-06-21 | - |
dc.date.issued | 2011-04 | - |
dc.identifier.issn | 0022-2461 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/84613 | - |
dc.description.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 A degrees C. Among the Al, Zr, and Ce species investigated, we found that lithium aluminate (LiAlO(2)), lithium zirconate (Li(2)ZrO(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))(2)CO(3) at 650 A degrees C to evaluate the phase and microstructure stabilities of these materials. The gamma-LiAlO(2) phase transformation, determined using X-ray diffractometry, was dependent on the immersion time. We performed similar measurements for alpha-LiAlO(2), Li(2)ZrO(3), and CeO(2) materials in molten Li/K carbonate at 650 A degrees C. From immersion tests, the presence of the alpha-LiAlO(2) phase revealed that phase transformation of gamma-LiAlO(2) occurs in Li/K carbonate melts under cathode gas atmospheres; in contrast, no phase transformation was evident after immersion of the pure alpha-LiAlO(2) phase in molten carbonate for 5,000 h. Furthermore, we found that Li(2)ZrO(3) and CeO(2) were stable phases after immersion in molten carbonate at 650 A degrees C, under both anode and cathode gas atmospheres, for more than 5,000 h. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | SPRINGER | - |
dc.title | Phase stabilities in molten Li/K carbonate of efficient matrix materials for molten carbonate fuel cells: thermodynamic calculations and experimental investigations | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Hong Seong Ahn | - |
dc.contributor.affiliatedAuthor | SukWoo Nam | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS SCIENCE, v.46, no.8, pp.2557 - 2567 | - |
dc.relation.isPartOf | JOURNAL OF MATERIALS SCIENCE | - |
dc.citation.title | JOURNAL OF MATERIALS SCIENCE | - |
dc.citation.volume | 46 | - |
dc.citation.number | 8 | - |
dc.citation.startPage | 2557 | - |
dc.citation.endPage | 2567 | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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