کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7722420 | 1497522 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ceria-based electrolyte reinforced by sol-gel technique for intermediate-temperature solid oxide fuel cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
High performance solid oxide fuel cells (SOFCs) based on gadolinia-doped ceria (GDC) electrolyte are demonstrated for intermediate temperature operation. The inherent technical limitations of the GDC electrolyte in sinterability and mechanical properties are overcome by applying sol-gel coating technique to the screen-printed film. When the quality of the electrolyte film is enhanced by the additional sol-gel coating, the OCV and maximum power density increase from 0.73 to 0.90 V and from 0.55 to 0.95 W cmâ2, respectively, at 650 °C with humidified hydrogen (3% H2O) as fuel and air as oxidant. The impedance analysis reveals that the reinforcement of the thin electrolyte with sol-gel coating significantly reduces the polarization resistance. Elementary reaction steps for the anode and cathode are analyzed based on the systematic impedance study, and the relation between the structural integrity of the electrolyte and the electrode polarization is discussed in detail.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 23, 6 August 2013, Pages 9867-9872
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 23, 6 August 2013, Pages 9867-9872
نویسندگان
Yun-Gyeom Choi, Jun-Young Park, Ji-Won Son, Jong-Ho Lee, Hae-June Je, Byung-Kook Kim, Hae-Weon Lee, Kyung Joong Yoon,