Effect of CaO concentration on enhancement of grain-boundary conduction in gadolinia-doped ceria
DC Field | Value | Language |
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dc.contributor.author | Cho, Pyeong-Seok | - |
dc.contributor.author | Lee, Sung Bo | - |
dc.contributor.author | Cho, Yoon Ho | - |
dc.contributor.author | Kim, Doh-Yeon | - |
dc.contributor.author | Park, Hyun-Min | - |
dc.contributor.author | Lee, Jong-Heun | - |
dc.date.accessioned | 2021-09-09T04:30:17Z | - |
dc.date.available | 2021-09-09T04:30:17Z | - |
dc.date.created | 2021-06-10 | - |
dc.date.issued | 2008-09-01 | - |
dc.identifier.issn | 0378-7753 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/122730 | - |
dc.description.abstract | This study examines the effect of calcium oxide (CaO) addition to Ce0.9Gd0.1 O-1.95 (gadolinia-doped ceria, CDC) containing 500 ppm SiO2 on grain-interior and grain-bounclary conduction. The CDC can be used as a solid electrolyte for intermediate and low-temperature solid oxide fuel cells. Doping with >= 2 mol% CaO results in a decrease in apparent grain-boundary resistivity at 300 degrees C from 746.7 k Omega cm to 2.8-3.5 k Omega cm. The total resistivity exhibits a minimum at 2 mol% CaO. Further increase in CaO concentration to 10 mol% results in an increase in grain-interior resistivity from 3.1 to 40 k Omega cm. Although most of the CaO is incorporated into the GDC lattice, a small amount of CaO scavenges the intergranular siliceous phase, which leads to a significant increase in grain-bounclary conduction. The increase in grain-interior resistivity at high CaO concentration is attributed to defect association between Vo center dot center dot and Ca-ce. (C) 2008 Elsevier B.V. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER | - |
dc.subject | IONIC-CONDUCTIVITY | - |
dc.subject | ELECTRICAL-PROPERTIES | - |
dc.subject | STABILIZED ZIRCONIA | - |
dc.subject | ALUMINA ADDITIONS | - |
dc.subject | TRIVALENT CATIONS | - |
dc.subject | ELECTROLYTES | - |
dc.subject | IMPROVEMENT | - |
dc.subject | MICROSTRUCTURE | - |
dc.subject | MITIGATION | - |
dc.subject | PHASE | - |
dc.title | Effect of CaO concentration on enhancement of grain-boundary conduction in gadolinia-doped ceria | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Jong-Heun | - |
dc.identifier.doi | 10.1016/j.jpowsour.2008.05.041 | - |
dc.identifier.scopusid | 2-s2.0-48249086244 | - |
dc.identifier.wosid | 000259716600011 | - |
dc.identifier.bibliographicCitation | JOURNAL OF POWER SOURCES, v.183, no.2, pp.518 - 523 | - |
dc.relation.isPartOf | JOURNAL OF POWER SOURCES | - |
dc.citation.title | JOURNAL OF POWER SOURCES | - |
dc.citation.volume | 183 | - |
dc.citation.number | 2 | - |
dc.citation.startPage | 518 | - |
dc.citation.endPage | 523 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Electrochemistry | - |
dc.relation.journalResearchArea | Energy & Fuels | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Electrochemistry | - |
dc.relation.journalWebOfScienceCategory | Energy & Fuels | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | IONIC-CONDUCTIVITY | - |
dc.subject.keywordPlus | ELECTRICAL-PROPERTIES | - |
dc.subject.keywordPlus | STABILIZED ZIRCONIA | - |
dc.subject.keywordPlus | ALUMINA ADDITIONS | - |
dc.subject.keywordPlus | TRIVALENT CATIONS | - |
dc.subject.keywordPlus | ELECTROLYTES | - |
dc.subject.keywordPlus | IMPROVEMENT | - |
dc.subject.keywordPlus | MICROSTRUCTURE | - |
dc.subject.keywordPlus | MITIGATION | - |
dc.subject.keywordPlus | PHASE | - |
dc.subject.keywordAuthor | gadolinia-doped (GDC) | - |
dc.subject.keywordAuthor | grain-boundary conduction | - |
dc.subject.keywordAuthor | scavenging effect | - |
dc.subject.keywordAuthor | solid oxide fuel cell | - |
dc.subject.keywordAuthor | calcium oxide | - |
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