La0.8Sr0.2Mn1-xRuxO 3-δ as a cathode material for solid oxide fuel cells

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题名:	La0.8Sr0.2Mn1-xRuxO 3-δ as a cathode material for solid oxide fuel cells
作者:	林景崎;Lin, Jing-Chie;Ting, Fu-Pin;Lee, Tai-Yang;Chyou, San-Der;Lai, Chien-Ming
贡献者:	工學院材料科學與工程研究所
关键词:	Applied sciences;Cathode material;Crystal structure;EIS;Energy;Energy. Thermal use of fuels;Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc;Exact sciences and technology;Fuel cells;SOFC
日期:	2013-02-06
上传时间:	2026-04-23 11:38:02 (UTC+8)
出版者:	Elsevier Ltd.;Kidlington: Elsevier Ltd
摘要:	摘要： Oxides of La0.8Sr0.2Mn1−xRuxO3−δ (LSMR) (x = 0, 0.25, 0.50, 0.75, or 1.0) were prepared to fabricate cathodes in solid oxide fuel cells. The crystal structure changed from trigonal (x = 0 or 0.25) to a mixture of trigonal and orthorhombic (x = 0.5) and to orthorhombic (x = 0.75 or 1.0). X-ray photoelectron spectroscopy analysis after electrochemical testing indicated that the relative concentrations of Ru4+ to Ru6+ and Mn4+ to Mn2+ influence the performance of a single cell. The transformation from Ru4+ to Ru6+ releases two electrons but that from Mn4+ to Mn2+ creates two electron holes (an oxygen vacancy). The relative concentrations in LSMR were determined using the stoichiometric ratio (x) of Ru, and then, the concentrations of electrons and electron holes for influencing the cathode electrochemical catalytic reactivity were estimated. x = 0.25 represented the better cell performance, and Ru may stabilize the LSMR grain size during electrochemical testing. ► The stoichiometric ratio (x) of Ru at 0.25 represented the better cell performance. ► The crystal structure changed from trigonal to orthorhombic by different Ru content. ► The varying of valence for Mn and Ru influence the performance of a single cell. ► The Ru doping into LSM may stabilize the grain size of LSMR and porous structure. 出版者： Kidlington: Elsevier Ltd 出版日期： 2013-02-06 出處： International journal of hydrogen energy, 2013-02, Vol.38 (3), p.1714-1724 資源來源： ScienceDirect (Elsevier) Journals 版權： 2012 Hydrogen Energy Publications, LLC. 版權： 2014 INIST-CNRS 識別號： ISSN: 0360-3199 識別號： EISSN: 1879-3487 識別號： DOI: 10.1016/j.ijhydene.2012.08.111 識別號： CODEN: IJHEDX
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