Degradation mechanism of electrolyte and air electrode in solid oxide electrolysis cells operating at high polarization
DC Field | Value | Language |
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dc.contributor.author | Kim, Jeonghee | - |
dc.contributor.author | Ji, Ho-Ii | - |
dc.contributor.author | Dasari, Hari Prasad | - |
dc.contributor.author | Shin, Dongwook | - |
dc.contributor.author | Song, Huesup | - |
dc.contributor.author | Lee, Jong-Ho | - |
dc.contributor.author | Kim, Byung-Kook | - |
dc.contributor.author | Je, Hae-June | - |
dc.contributor.author | Lee, Hae-Weon | - |
dc.contributor.author | Yoon, Kyung Joong | - |
dc.date.accessioned | 2022-07-16T11:22:01Z | - |
dc.date.available | 2022-07-16T11:22:01Z | - |
dc.date.created | 2021-05-12 | - |
dc.date.issued | 2013-02 | - |
dc.identifier.issn | 0360-3199 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/163519 | - |
dc.description.abstract | Degradation mechanism of the electrolyte and air electrode is reported for solid oxide electrolysis cells (SOECs). Symmetric cells composed of yttria-stabilized zirconia (YSZ) electrolyte, Sr-doped LaMnO3 +/-delta (LSM)/YSZ composite working and counter electrodes, and Pt ring-type reference electrode are used to simulate the operating conditions of the air electrode. Degradation behavior in the impedance spectra is characterized as growth of mid-frequency arc at the initial stage, gradual increase of ohmic resistance throughout the operation, and sharp rise of low frequency resistance at the final stage, followed by catastrophic cell failure. Initial stage degradation is attributed to deactivation of LSM, resulting from reduction of oxygen vacancy concentration and/or segregation of passivation species on LSM surface under anodic current passage. Intergranular fracture, which occurs along the grain boundaries of the YSZ electrolyte, is responsible for gradual increase of ohmic resistance. Increase of low frequency arc at the final stage is caused by densification of the air electrode, leading to excessive pressure build-up and delamination of the air electrode. Cation migration, which is facilitated by oxygen excess nonstoichiometry of LSM and externally applied electric field, is considered to be the main cause of permanent damages. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Degradation mechanism of electrolyte and air electrode in solid oxide electrolysis cells operating at high polarization | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Shin, Dongwook | - |
dc.identifier.doi | 10.1016/j.ijhydene.2012.10.113 | - |
dc.identifier.scopusid | 2-s2.0-84872296755 | - |
dc.identifier.wosid | 000315430600002 | - |
dc.identifier.bibliographicCitation | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.38, no.3, pp.1225 - 1235 | - |
dc.relation.isPartOf | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | - |
dc.citation.title | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | - |
dc.citation.volume | 38 | - |
dc.citation.number | 3 | - |
dc.citation.startPage | 1225 | - |
dc.citation.endPage | 1235 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Electrochemistry | - |
dc.relation.journalResearchArea | Energy & Fuels | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Electrochemistry | - |
dc.relation.journalWebOfScienceCategory | Energy & Fuels | - |
dc.subject.keywordPlus | HIGH-TEMPERATURE ELECTROLYSIS | - |
dc.subject.keywordPlus | DEMIXING PROFILE CALCULATION | - |
dc.subject.keywordPlus | ELECTROCHEMICAL PERFORMANCE | - |
dc.subject.keywordPlus | INTERMEDIATE-TEMPERATURE | - |
dc.subject.keywordPlus | IMPEDANCE SPECTROSCOPY | - |
dc.subject.keywordPlus | CATHODIC POLARIZATION | - |
dc.subject.keywordPlus | STABILIZED ZIRCONIA | - |
dc.subject.keywordPlus | HYDROGEN-PRODUCTION | - |
dc.subject.keywordPlus | OXYGEN REDUCTION | - |
dc.subject.keywordPlus | WATER-VAPOR | - |
dc.subject.keywordAuthor | Solid oxide electrolyzer | - |
dc.subject.keywordAuthor | Impedance spectroscopy | - |
dc.subject.keywordAuthor | Anodic current | - |
dc.subject.keywordAuthor | Degradation | - |
dc.subject.keywordAuthor | Densification | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0360319912024391?via%3Dihub | - |
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