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DC Field | Value | Language |
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dc.citation.endPage | 443 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 439 | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY | - |
dc.citation.volume | 21 | - |
dc.contributor.author | Yoo, Seonyoung | - |
dc.contributor.author | Shin, Jee Young | - |
dc.contributor.author | Kim, Guntae | - |
dc.date.accessioned | 2023-12-22T06:37:24Z | - |
dc.date.available | 2023-12-22T06:37:24Z | - |
dc.date.created | 2013-06-24 | - |
dc.date.issued | 2011-01 | - |
dc.description.abstract | A solid oxide fuel cell is a device that converts the chemical energy in fuel to the electrical energy directly, efficiently and eco-friendly. The cation ordered perovskite-related oxide, NdBaCo2O5+delta (NBCO), is known as one of the best cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs) because of their superior electrochemical properties. The aim of this work is to identify the crucial characteristics of NdBaCo2O5+delta/YSZ composites, such as the redox properties, the structures, and the electrical conductivities for a new cathode material for IT-SOFCs. Thermodynamic redox properties including oxidation enthalpies and entropies were investigated by coulometric titration. The isotherms were obtained at 923, 973 and 1023 K over a wide range of p(O-2). Oxygen non-stoichiometries have shown that higher temperatures lead the composites to a deeper reduction state rapidly near the p(O-2) of 10(-5) atm and at 1023 K, which can be the sign of the decomposition. Therefore, the NBCO-YSZ composites may not be suitable for the cathodes of SOFCs above operating temperatures of 1023 K due to the decomposition. The oxidation enthalpies and entropies were determined from the isotherms and the electrical conductivities measured by the 4-probe method were high enough for IT-SOFC cathode applications. | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY, v.21, no.2, pp.439 - 443 | - |
dc.identifier.doi | 10.1039/c0jm01779e | - |
dc.identifier.issn | 0959-9428 | - |
dc.identifier.scopusid | 2-s2.0-78650338731 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/2583 | - |
dc.identifier.url | http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=78650338731 | - |
dc.identifier.wosid | 000285391300022 | - |
dc.language | 영어 | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.title | Thermodynamic and electrical characteristics of NdBaCo2O5+delta at various oxidation and reduction states | - |
dc.type | Article | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical; Materials Science, Multidisciplinary | - |
dc.relation.journalResearchArea | Chemistry; Materials Science | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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