کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5441928 1510685 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evaluation of La0.3Ca0.7Fe1−yCryO3−δ (y = 0.1-0.3) cathodes for intermediate temperature solid oxide fuel cells
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Evaluation of La0.3Ca0.7Fe1−yCryO3−δ (y = 0.1-0.3) cathodes for intermediate temperature solid oxide fuel cells
چکیده انگلیسی
Perovskite-type (ABO3) complex oxides of La0.3Ca0.7Fe1−yCryO3−δ (y = 0.1-0.3) system were prepared via a glycine-nitrate process. In view of utilization as cathode for intermediate temperature solid oxide fuel cells, the structure, electrical conducting, thermal expansion and electrochemical properties of the oxides were investigated in comparison with their strontium counterparts (La0.3Sr0.7Fe1−yCryO3−δ, y = 0.1-0.3). Differences in the properties between the two systems were interpreted in relation with their structural characteristics. The results corroborate the effectiveness of modulating A-site dimension in modifying the overall properties of iron chromium-based perovskite-type cathode materials. The calcium compositions with y = 0.2 and y = 0.3, respectively, exhibit the optimal overall properties, superior to their strontium counterparts. The good overall properties of the two compositions, including suitable thermal expansion coefficients (11-12 × 10−6 K−1 between 40 and 1000 °C), low polarization resistances (∼0.12 Ω cm2 at 800 °C) and acceptable electrical conductivity (∼40 S cm−1 at 800 °C), demonstrate their potential in cathode utilization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 90, June 2017, Pages 104-110
نویسندگان
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