Engineering of the Charged Defects at the Perovskite Oxide Surfaces for Exceptionally Stable Solid Oxide Fuel Cell Electrodes
DC Field | Value | Language |
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dc.contributor.author | Choi, Mingi | - |
dc.contributor.author | Ibrahim, Ismail A. M. | - |
dc.contributor.author | Kim, Kyeounghak | - |
dc.contributor.author | Koo, Ja Yang | - |
dc.contributor.author | Kim, Seo Ju | - |
dc.contributor.author | Son, Ji-Won | - |
dc.contributor.author | Han, Jeong Woo | - |
dc.contributor.author | Lee, Wonyoung | - |
dc.date.accessioned | 2023-07-24T09:28:54Z | - |
dc.date.available | 2023-07-24T09:28:54Z | - |
dc.date.created | 2023-07-19 | - |
dc.date.issued | 2020-05 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/187344 | - |
dc.description.abstract | Cation segregation, particularly Sr segregation, toward a perovskite surface has a significant effect on the performance degradation of a solid oxide cell (solid oxide electrolysis/fuel cell). Among the number of key reasons generating the instability of perovskite oxide, surface-accumulated positively charged defects (oxygen vacancy, V-o(center dot center dot)) have been considered as the most crucial drivers in strongly attracting negatively charged defects (SrA - site') toward the surface. Herein, we demonstrate the effects of a heterointerface on the redistribution of both positively and negatively charged defects for a reduction of V-o(center dot center dot) at a perovskite surface. We took Sm0.5Sr0.5CoO3-delta (SSC) as a model perovskite film and coated Gd0.1Ce0.9O2-delta (GDC) additionally onto the SSC film to create a heterointerface (GDC/SSC), resulting in an similar to 11-fold reduction in a degradation rate of similar to 8% at 650 degrees C and similar to 10-fold higher surface exchange (k(q)) than a bare SSC film after 150 h at 650 degrees C. Using X-ray photoelectron spectroscopy and electron energy loss spectroscopy, we revealed a decrease in positively charged defects of V-o(center dot center dot) and transferred electrons in an SSC film at the GDC/SSC heterointerface, resulting in a suppression of negatively charged Sr (Sr-Sm') segregation. Finally, the energetic behavior, including the charge transfer phenomenon, O p-band center, and oxygen vacancy formation energy calculated using the density functional theory, verified the effects of the heterointerface on the redistribution of the charged defects, resulting in a remarkable impact on the stability of perovskite oxide at elevated temperatures. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Engineering of the Charged Defects at the Perovskite Oxide Surfaces for Exceptionally Stable Solid Oxide Fuel Cell Electrodes | - |
dc.title.alternative | Engineering of Charged Defects at Perovskite Oxide Surfaces for Exceptionally Stable Solid Oxide Fuel Cell Electrodes | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Kyeounghak | - |
dc.identifier.doi | 10.1021/acsami.9b21919 | - |
dc.identifier.scopusid | 2-s2.0-85088016130 | - |
dc.identifier.wosid | 000535246100032 | - |
dc.identifier.bibliographicCitation | ACS APPLIED MATERIALS & INTERFACES, v.12, no.19, pp.21494 - 21504 | - |
dc.relation.isPartOf | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.title | ACS APPLIED MATERIALS & INTERFACES | - |
dc.citation.volume | 12 | - |
dc.citation.number | 19 | - |
dc.citation.startPage | 21494 | - |
dc.citation.endPage | 21504 | - |
dc.type.rims | ART | - |
dc.type.docType | 정기학술지(Article(Perspective Article포함)) | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | TOTAL-ENERGY CALCULATIONS | - |
dc.subject.keywordPlus | STABILIZED-ZIRCONIA | - |
dc.subject.keywordPlus | CATION SEGREGATION | - |
dc.subject.keywordPlus | OXYGEN VACANCIES | - |
dc.subject.keywordPlus | SR SEGREGATION | - |
dc.subject.keywordPlus | CATHODE | - |
dc.subject.keywordPlus | TEMPERATURE | - |
dc.subject.keywordPlus | EXCHANGE | - |
dc.subject.keywordPlus | (LA,SR)COO3-DELTA | - |
dc.subject.keywordPlus | HETEROINTERFACES | - |
dc.subject.keywordAuthor | Solid oxide fuel cell | - |
dc.subject.keywordAuthor | Perovskite oxide | - |
dc.subject.keywordAuthor | Stability | - |
dc.subject.keywordAuthor | Cation segregation | - |
dc.subject.keywordAuthor | Charged defects | - |
dc.subject.keywordAuthor | Heterointerface | - |
dc.subject.keywordAuthor | Redistribution | - |
dc.subject.keywordAuthor | Electron transfer | - |
dc.identifier.url | https://pubs.acs.org/doi/10.1021/acsami.9b21919 | - |
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