کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1606409 1516227 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Antimony doped barium strontium ferrite perovskites as novel cathodes for intermediate-temperature solid oxide fuel cells
ترجمه فارسی عنوان
آنتیموان باریم استرانسیم فریت پرووویسیتها را به عنوان کاتدهای جدید برای سلولهای سوختی جامد اکسید جامد
کلمات کلیدی
سلول های سوختی اکسید جامد، باریم استرانسیم فریت، دوپینگ آنتیموان، تجزیه شیمیایی نقص، مقاومت پلاریزاسیون متقابل
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
چکیده انگلیسی


• Antimony is doped to barium strontium ferrite to produce novel cathodes.
• δ, TECs and σ are evaluated as a function of antimony content.
• The electrochemical performance is substantially improved with antimony doping.

Antimony was doped to barium strontium ferrite to produce ferrite-based perovskites with a composition of Ba0.5Sr0.5Fe1−xSbxO3−δ (x = 0.0, 0.05, 0.1) as novel cathode materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The perovskite properties including oxygen nonstoichiometry (δ), mean valence of B-site, tolerance factors, thermal expansion coefficient (TEC) and electrical conductivity (σ) are explored as a function of antimony content. By defect chemistry analysis, the TECs decrease since the variable oxygen vacancy concentration is decreased by Sb doping, and σ decreases with x due to the reduced charge concentration of Fe4+ content. Consequently, the electrochemical performance was substantially improved and the interfacial polarization resistance was reduced from 0.213 to 0.120 Ωcm2 at 700 °C with Sb doping. The perovskite with x = 1.0 is suggested as the most promising composition as SOFC cathode material.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 666, 5 May 2016, Pages 23–29
نویسندگان
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