کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1297553 | 1498403 | 2006 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and electrochemical characterisation of supporting SOFC-Ni-YZT anodes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
Symmetrical cells consisting of Ni-Y0.20Ti0.18Zr0.62O1.90 (Ni-YZT) cermet electrodes on a Ni-YSZ support have been investigated with respect to the hydrogen/water partial pressures. Impedance spectra at open circuit potential were obtained as function of temperature and analysed in terms of a fractal finite length Gerischer Impedance. For fine and coarse microstructures of the Ni-YZT electrodes, a consistent set of model parameters could be obtained. The results indicate that surface diffusion rather than bulk diffusion plays a role in the hydrogen/water reaction but also that a fine-grained fraction in the mixed conducting YZT phase is advantageous for the overall electrode performance and the surface exchange reaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 177, Issues 19â25, 15 October 2006, Pages 2029-2032
Journal: Solid State Ionics - Volume 177, Issues 19â25, 15 October 2006, Pages 2029-2032
نویسندگان
P. Holtappels, M. Verbraeken, U. Vogt, D.H.A. Blank, B.A. Boukamp,