Repository Community: null
http://hdl.handle.net/20.500.11750/253
2024-03-29T11:49:56Z
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Defect chemistry of highly defective La0.1Sr0.9Co0.8Fe0.2O3-Delta by considering oxygen interstitials
http://hdl.handle.net/20.500.11750/56372
Title: Defect chemistry of highly defective La0.1Sr0.9Co0.8Fe0.2O3-Delta by considering oxygen interstitials
Author(s): Im, Ha Ni; Singh, Bhupendra P.; Hong, Jae Woon; Kim, In Ho; Lee, Kang Taek; Song, Sun Ju
Abstract: In case of highly defective perovskite oxides such as La0.1Sr0.9Co0.8Fe0.2O3-δ (LSCF1982), the ionic defect has been in question by suggesting direct oxygen ion diffusion by considering lattice oxygen site as an interstitial rather than an oxygen vacancy. In the present study, the thermomigration of ionic defect species was measured by ionic thermopower measurement to provide strong evidence of interstitial diffusion and the defect structure was further analyzed in terms of effectively negatively charged oxygen interstitial as a charge-compensating defect against hole. Two kinds of holes-delocalized and localized at B-site cations; were investigated by defect chemical analysis. From the conductivity analysis based on the non-stoichiometry results, the contributions of delocalized holes, localized hole at Co site, localized hole at Fe site, and localized hole moving from Co site to Fe site were successfully separated, and it was observed that the hopping reaction involving hole localized at Co is dominant in conductivity mechanism. The measurement of electronic thermopower further confirms the involvement of two different types of holes in p-type conduction. © 2016 The Electrochemical Society. All rights reserved.
2015-12-31T15:00:00Z
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고체산화물 연료 전지용 연결재, 이의 제조방법 및 이를 포함하는 고체 산화물 연료 전지
http://hdl.handle.net/20.500.11750/48144
Title: 고체산화물 연료 전지용 연결재, 이의 제조방법 및 이를 포함하는 고체 산화물 연료 전지
Author(s): Imdadullah Thaheem; 노태민; 전도연; 임상혁; 조동우; 최광욱; 이강택; 이헌형
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고체산화물 연료 전지용 연결재, 그 제조방법 및 고체 산화물 연료 전지
http://hdl.handle.net/20.500.11750/48122
Title: 고체산화물 연료 전지용 연결재, 그 제조방법 및 고체 산화물 연료 전지
Author(s): 류창석; 최광욱; Imdadullah Thaheem; 조동우; 박광연; 노태민; 김대환; 이강택
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고체산화물 연료 전지용 연결재, 그 제조방법 및 고체 산화물 연료 전지
http://hdl.handle.net/20.500.11750/48123
Title: 고체산화물 연료 전지용 연결재, 그 제조방법 및 고체 산화물 연료 전지
Author(s): Imdadullah Thaheem; 조동우; 류창석; 최광욱; 노태민; 이강택; 박광연; 김대환