Correlation between defect structure and electrochemical properties of mixed conducting La0.1Sr0.9Co0.8Fe0.2O3-delta
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, Moon-Bong | - |
dc.contributor.author | Jeon, Sang-Yun | - |
dc.contributor.author | Singh, Bhupendra | - |
dc.contributor.author | Yoo, Young-Sung | - |
dc.contributor.author | Hwang, Jin-Ha | - |
dc.contributor.author | Song, Sun-Ju | - |
dc.date.accessioned | 2021-11-11T02:45:11Z | - |
dc.date.available | 2021-11-11T02:45:11Z | - |
dc.date.created | 2021-10-25 | - |
dc.date.issued | 2014-02-15 | - |
dc.identifier.issn | 1359-6454 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/16749 | - |
dc.description.abstract | The high catalytic properties of LSCF1982 arise from its defect structure. In this work, the oxygen nonstoichiometry (delta) of LSCF1982 was analyzed as a function of oxygen partial pressure (P-O2) and temperature for the -6 <= log(P-O2/atm) <= 0 and 800 <= T/degrees C <= 1000 ranges. A defect structure model for LSCF1982 was presented, which fitted well with the experimental data for delta. The equilibrium constants of appropriate defect reactions were determined. Analysis of the defect structure of LSCF1982 suggested that the conduction mechanism of LSCF1982 is governed by hopping conduction and band conduction of p-type carriers, which was determined by the analysis of thermoelectric power. The characteristic membrane thickness (L-c), indicating the transition from predominantly bulk-diffusion controlled reaction to surface-exchange controlled reaction, had a value of 3.5 +/- 0.9 x 10(-2) cm. The oxygen vacancy diffusivity was calculated from the relationship between oxygen flux and oxygen chemical potential gradient. The chemical expansion was measured as a function of P-O2 and temperature in the 10(-3) <= P-O2/atm <= 0.21 and 800 <= T/degrees C <= 1000 ranges. The chemical expansion model based on the relative change in mean ionic radius was employed to compute the chemical expansion vs. delta, which indicated that the spin states of B-site transition metal ions are a mixture of high-spin and low-spin states, and made the transition from the low-spin to the high-spin state with an increase in delta and temperature. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.subject | CERAMIC FUEL-CELLS | - |
dc.subject | OXYGEN NONSTOICHIOMETRY | - |
dc.subject | ELECTRICAL-PROPERTIES | - |
dc.subject | THERMOELECTRIC-POWER | - |
dc.subject | CHEMICAL EXPANSION | - |
dc.subject | HIGH-TEMPERATURE | - |
dc.subject | OXIDES | - |
dc.subject | PERMEATION | - |
dc.subject | CATHODES | - |
dc.subject | LA1-XSRXCO1-YFEYO3 | - |
dc.title | Correlation between defect structure and electrochemical properties of mixed conducting La0.1Sr0.9Co0.8Fe0.2O3-delta | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Hwang, Jin-Ha | - |
dc.identifier.doi | 10.1016/j.actamat.2013.11.006 | - |
dc.identifier.scopusid | 2-s2.0-84907425749 | - |
dc.identifier.wosid | 000331347600035 | - |
dc.identifier.bibliographicCitation | ACTA MATERIALIA, v.65, pp.373 - 382 | - |
dc.relation.isPartOf | ACTA MATERIALIA | - |
dc.citation.title | ACTA MATERIALIA | - |
dc.citation.volume | 65 | - |
dc.citation.startPage | 373 | - |
dc.citation.endPage | 382 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Metallurgy & Metallurgical Engineering | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Metallurgy & Metallurgical Engineering | - |
dc.subject.keywordPlus | CERAMIC FUEL-CELLS | - |
dc.subject.keywordPlus | OXYGEN NONSTOICHIOMETRY | - |
dc.subject.keywordPlus | ELECTRICAL-PROPERTIES | - |
dc.subject.keywordPlus | THERMOELECTRIC-POWER | - |
dc.subject.keywordPlus | CHEMICAL EXPANSION | - |
dc.subject.keywordPlus | HIGH-TEMPERATURE | - |
dc.subject.keywordPlus | OXIDES | - |
dc.subject.keywordPlus | PERMEATION | - |
dc.subject.keywordPlus | CATHODES | - |
dc.subject.keywordPlus | LA1-XSRXCO1-YFEYO3 | - |
dc.subject.keywordAuthor | Defect | - |
dc.subject.keywordAuthor | Oxygen nonstoichiometry | - |
dc.subject.keywordAuthor | Diffusion | - |
dc.subject.keywordAuthor | Fuel cell material | - |
dc.subject.keywordAuthor | Mixed conductor | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
94, Wausan-ro, Mapo-gu, Seoul, 04066, Korea02-320-1314
COPYRIGHT 2020 HONGIK 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.