کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7716571 | 1497469 | 2015 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High performance La0.3Ca0.7Cr0.3Fe0.7O3âδ air electrode for reversible solid oxide fuel cell applications
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
A novel mixed-conducting perovskite oxide (La0.3Ca0.7Fe0.7Cr0.3O3âδ, LCFCr), prepared using the combustion method, has been developed as a new air electrode material for reversible solid oxide fuel cells (RSOFCs) applications. XRD analysis showed that the LCFCr powder is a pure crystalline phase with an orthorhombic perovskite structure and that its thermal expansion coefficient matches closely with several commonly used solid electrolytes, while TEM analysis confirmed the high purity of the LCFCr powders. The electrochemical activity of LCFCr, screen-printed on a gadolinium doped ceria electrolyte, towards both the oxygen reduction (ORR) and oxygen evolution (OER) reactions, was examined at 600-800 °C in stagnant air using a symmetrical RSOFC configuration. Under open circuit conditions, LCFCr showed a very low polarization resistance (Rp) of only 0.07 Ω cm2 at 800 °C, comparable to some of the best-performing oxide materials reported by others. The LCFCr air electrode was also found to be very stable, with very little loss in performance and no interfacial damage observed, even after 100 h at a 0.4 V (OER) and â0.4 V (ORR) overpotentials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 4, 30 January 2015, Pages 1902-1910
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 4, 30 January 2015, Pages 1902-1910
نویسندگان
Beatriz Molero-Sánchez, Jesús Prado-Gonjal, David Ávila-Brande, Min Chen, Emilio Morán, Viola Birss,