Improved strontium segregation suppression of lanthanum strontium cobalt oxide cathode via chemical etching and atomic layer deposition
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Dong Hwan | - |
dc.contributor.author | Yang, Sungeun | - |
dc.contributor.author | Kwon, Deok-Hwang | - |
dc.contributor.author | Ji, Ho-Il | - |
dc.contributor.author | Son, Ji-Won | - |
dc.contributor.author | Shim, Joon Hyung | - |
dc.date.accessioned | 2022-08-12T13:40:32Z | - |
dc.date.available | 2022-08-12T13:40:32Z | - |
dc.date.created | 2022-08-12 | - |
dc.date.issued | 2022-07 | - |
dc.identifier.issn | 0363-907X | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/142911 | - |
dc.description.abstract | This study was conducted to improve the stability of a high-performance cathode, which plays a crucial role in lowering the operating temperature of solid oxide fuel cells (SOFCs) to below 600 degrees C while retaining its performance. Lanthanum strontium cobalt oxide (LSC) is a representative SOFC cathode material used in the intermediate temperature (IT) region (500 degrees C-600 degrees C). When segregation occurs on the cathode surface during high-temperature fabrication, the initial performance degrades to a certain extent, followed by continuous performance degradation. Herein, we aimed to overcome this degradation through surface modification. Accordingly, an ideal LSC surface composition was achieved by removing the segregated Sr through wet chemical etching of the cathode surface. Further, an atomic layer deposition (ALD) process of less than 1 nm thickness was introduced to prevent further Sr separation and minimize performance degradation. The peak power density of the cell with the modified surface (M-LSC) at 550 degrees C was 509 mW cm(-2), whereas that of the cell with bare LSC was 483 mW cm(-2). Based on the 70-h short-term stability test, the bare LSC showed a degradation of 70 mV, while the M-LSC remained stable with no degradation. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | WILEY | - |
dc.subject | PEROVSKITE OXIDES | - |
dc.subject | SR SEGREGATION | - |
dc.subject | FUEL-CELLS | - |
dc.subject | SURFACE | - |
dc.subject | DEGRADATION | - |
dc.subject | YSZ | - |
dc.title | Improved strontium segregation suppression of lanthanum strontium cobalt oxide cathode via chemical etching and atomic layer deposition | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Son, Ji-Won | - |
dc.contributor.affiliatedAuthor | Shim, Joon Hyung | - |
dc.identifier.doi | 10.1002/er.8012 | - |
dc.identifier.scopusid | 2-s2.0-85129006899 | - |
dc.identifier.wosid | 000789397500001 | - |
dc.identifier.bibliographicCitation | INTERNATIONAL JOURNAL OF ENERGY RESEARCH, v.46, no.9, pp.12467 - 12475 | - |
dc.relation.isPartOf | INTERNATIONAL JOURNAL OF ENERGY RESEARCH | - |
dc.citation.title | INTERNATIONAL JOURNAL OF ENERGY RESEARCH | - |
dc.citation.volume | 46 | - |
dc.citation.number | 9 | - |
dc.citation.startPage | 12467 | - |
dc.citation.endPage | 12475 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Energy & Fuels | - |
dc.relation.journalResearchArea | Nuclear Science & Technology | - |
dc.relation.journalWebOfScienceCategory | Energy & Fuels | - |
dc.relation.journalWebOfScienceCategory | Nuclear Science & Technology | - |
dc.subject.keywordPlus | PEROVSKITE OXIDES | - |
dc.subject.keywordPlus | SR SEGREGATION | - |
dc.subject.keywordPlus | FUEL-CELLS | - |
dc.subject.keywordPlus | SURFACE | - |
dc.subject.keywordPlus | DEGRADATION | - |
dc.subject.keywordPlus | YSZ | - |
dc.subject.keywordAuthor | atomic layer deposition | - |
dc.subject.keywordAuthor | cathode | - |
dc.subject.keywordAuthor | chemical etching | - |
dc.subject.keywordAuthor | solid oxide fuel cells | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.