کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5461297 | 1516198 | 2017 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Potassium doping optimization in proton-conducting Ba1-xKxCe0.6Zr0.2Y0.2O3-δ oxides for fuel cell applications
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This study first reports the K doping optimization in proton-conducting Ba1-xKxCe0.6Zr0.2Y0.2O3-δ (x = 0.025-0.2) oxides synthesized by using a combination of citrate-EDTA complexing sol-gel process and composition-exchange method. Among all samples, the ceramic pellet with a K doping content of 10% exhibits excellent sinterability, highest relative density, highest protonic conduction, and also excellent chemical stability against CO2. Moreover, the Pt/electrolyte/Pt single cell with such a Ba0.9K0.1Ce0.6Zr0.2Y0.2O3-δ electrolyte shows a significantly higher maximum powder density in the hydrogen-air fuel cell experiment, which can be attributed to its denser microstructures and higher protonic conductivity caused by introducing highly basic K cations. Based on these experimental results, we discuss the improvement mechanism in terms of calcined K-doped particle characteristics. This work demonstrates that the Ba1-xKxCe0.6Zr0.2Y0.2O3-δ oxide synthesized by the sol-gel combined with composition-exchange method with an optimal K doping would be a promising electrolyte for proton-conducting fuel cell applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 696, 5 March 2017, Pages 251-256
Journal: Journal of Alloys and Compounds - Volume 696, 5 March 2017, Pages 251-256
نویسندگان
Chung-Jen Tseng, Jeng-Kuei Chang, Kan-Rong Lee, I-Ming Hung, Jing-Chie Lin, Shian-Ching Jang, Sheng-Wei Lee,