کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7736537 | 1497974 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
SrMo0.9Co0.1O3âδ: A potential anode for intermediate-temperature solid-oxide fuel cells (IT-SOFC)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
SrMo0.9Co0.1O3âδ oxide has been prepared, characterized and tested as anode material in single solid-oxide fuel cells (SOFC), yielding output powers close to 800 mW cmâ2 at 850 °C with pure H2 as a fuel. This excellent performance is accounted for the results of an “in-situ” neutron powder diffraction (NPD) experiment, at the working conditions of a SOFC, showing the presence of a sufficiently high oxygen deficiency, with large displacement factors for oxygen atoms that suggest a large lability and mobility, combined with a huge metal-like electronic conductivity, as high as 386 S cmâ1 at T = 50 °C. Besides, the oxidation of the perovskite gives rise to a new oxygen deficient scheelite-like phase with formula SrMo0.9Co0.1O4âδ with Mo(VI), which has been studied by NPD and thermal analysis as far as crystal structure and composition are concerned. An adequate thermal expansion coefficient for both (oxidized and reduced) phases, an excellent reversibility upon cycling in oxidizing-reducing atmospheres and a good chemical compatibility with the electrolyte (La0.8Sr0.2Ga0.83Mg0.17O3âδ; LSGM) make this oxide a good candidate for anode in intermediate-temperature SOFC (IT-SOFCs).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 258, 15 July 2014, Pages 76-82
Journal: Journal of Power Sources - Volume 258, 15 July 2014, Pages 76-82
نویسندگان
R. MartÃnez-Coronado, J.A. Alonso, M.T. Fernández-DÃaz,