کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8943352 | 1645144 | 2019 | 44 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sr-substituted SmBa0.75Ca0.25CoFeO5+δ as a cathode for intermediate-temperature solid oxide fuel cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Layered perovskite oxides have received enormous attention as promising cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs). In this work, the SmBa0.75-xSrxCa0.25CoFeO5+δ (xâ¯=â¯0 and 0.25) samples are synthesized by solid-state reaction method. The effect of Sr doping on the crystal structure, chemical compatibility with the electrolyte, thermal expansion behavior, electrical conductivity, and electrochemical performance have been investigated. The substitution of Sr for Ba improves the electrical conductivity in comparison with the undoped sample. At 800â¯Â°C, the area specific resistance (ASR) value is decreased by 24% and the maximum powder density of the anode-supported single cell is increased by 30%. In contrast, at 600â¯Â°C, the ASR value is decreased by 41% and the maximum powder density is increased by 102%. The results indicate that the Sr-doping for this system has greater impact on electrochemical performance at lower temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 770, 5 January 2019, Pages 616-624
Journal: Journal of Alloys and Compounds - Volume 770, 5 January 2019, Pages 616-624
نویسندگان
Hua Yang, Yiheng Gu, Yanli Zhang, Yifeng Zheng, Zhonggang Zhang, Lin Ge, Han Chen, Lucun Guo,