کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11027283 | 1666312 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Combinatorial development of nanocrystalline/amorphous (La,Sr)CoO3-(La,Sr)2CoO4 composite cathodes for IT-SOFCs
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, a combinatorial approach was used to develop cathode materials with improved performance at temperatures in the range 500-700â¯Â°C. A thin film composite cathode library was obtained by co-sputtering of LSC-113 and LSC-214 onto suitably positioned substrates each with controlled compositions. The cathode library was screened with an electrochemical impedance spectroscopy using symmetric cells. The study showed that the compositions with volume fractions in the range 0.40â¯<â¯LSC-214â¯<â¯0.60 is particularly significant in yielding cathodes of improved performance. Refocusing the combinatorial screening to this range yielded LSC-113:LSC-214â¯=â¯0.45:0.55 as the most favorable compositions. Taking ASRâ¯=â¯0.15â¯Î©Â·cm2 as a useful benchmark, the study showed that cathodes in this range may be used at temperatures as low as 575â¯Â°C. It was further shown that composite cathodes have amorphous structures in co-sputtered conditions, and could remain so when used at reduced temperatures. At temperatures close to 700â¯Â°C the amorphous cathode turns into nanocrystalline two-phase structure with grains not more than 10â¯nm in size.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 326, 15 November 2018, Pages 124-130
Journal: Solid State Ionics - Volume 326, 15 November 2018, Pages 124-130
نویسندگان
Dogancan Sari, Fatih Piskin, Ziya Cagri Torunoglu, Bengisu Yasar, Yunus Eren Kalay, Tayfur Ozturk,