کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5145909 | 1497343 | 2017 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In-depth study of the Ruddlesden-Popper LaxSr2âxMnO4±δ family as possible electrode materials for symmetrical SOFC
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: In-depth study of the Ruddlesden-Popper LaxSr2âxMnO4±δ family as possible electrode materials for symmetrical SOFC In-depth study of the Ruddlesden-Popper LaxSr2âxMnO4±δ family as possible electrode materials for symmetrical SOFC](/preview/png/5145909.png)
چکیده انگلیسی
The Ruddlesden Popper (RP) manganites LaxSr2âxMnO4±δ with compositions 0.25 â¤Â x â¤Â 0.6 have been successfully synthesized as single phases by solid-state reaction in air. All those materials are not only stable in reducing atmosphere but they also maintain the K2NiF4-type structure with I4/mmm symmetry under redox cycling conditions with limited volume changes. The x = 0.5 phase was analyzed by in situ high temperature neutron powder diffraction (HTNPD), under flowing hydrogen, showing the formation of oxide-ion vacancies on the equatorial sites of the perovskite planes, during reduction process. The total electrical conductivity was optimized and found maximum for x = 0.5 with values of 35.6 S cmâ1 and 1.9 S cmâ1 at 800 °C in air and 3% H2/Ar, respectively, what is judged to be sufficient for an active layer of symmetrical SOFC electrode. First Electrochemical Impedance Spectroscopy (EIS) measurements in both oxidizing and reducing conditions, using an YSZ electrolyte and a GDC buffer layer, are presented giving rise to promising values.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 34, 24 August 2017, Pages 21930-21943
Journal: International Journal of Hydrogen Energy - Volume 42, Issue 34, 24 August 2017, Pages 21930-21943
نویسندگان
Mónica V. Sandoval, Caroline Pirovano, Edouard Capoen, Romain Jooris, Florence Porcher, Pascal Roussel, Gilles H. Gauthier,