کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7728962 | 1497925 | 2016 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly active nanoscale Ni - Yttria stabilized zirconia anodes for micro-solid oxide fuel cell applications
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
The optimum operating temperature of micro solid oxide fuel cells (μ-SOFCs) is < 600 °C, which normally results in an undesirably high internal resistance. While the resistance of the electrolyte (most commonly yttria stabilized zirconia, YSZ) can be lowered significantly simply by decreasing its thickness, minimization of the electrode resistance (thus maintaining rapid reaction kinetics) is not as straightforward. In this work, an ethylene glycol based polymeric precursor solution, which promotes the intimate mixing of the Ni, Y and Zr components prior to their crystallization as oxides, was spin-coated onto a YSZ disc, generating a nanocomposite NiO-YSZ thin film. The in-situ reduction of NiO phase within the dense NiO-YSZ film to Ni, in combination with the nanoscale size of the Ni and YSZ particles (ca. 25 nm), resulted in a nanoporous, Ni-YSZ anode morphology (thickness < 1 μm) with a homogeneous distribution of Ni and YSZ and a very high triple phase boundary length. Very small electrode polarization resistances of 0.65 Ω cm2 per electrode were obtained at 550 °C in humidified H2, the lowest values yet reported for SOFCs at this temperature. These highly active anodes are therefore very promising for use in next generation μ-SOFCs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 307, 1 March 2016, Pages 449-453
Journal: Journal of Power Sources - Volume 307, 1 March 2016, Pages 449-453
نویسندگان
Aligul Buyukaksoy, Viola I. Birss,