کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9760243 | 1498045 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Design considerations for segmented-in-series fuel cells
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
This paper describes calculations of the electrical losses in patterned series-connected solid oxide fuel cells (SOFCs), i.e. the “segmented-in-series” configuration. Losses due to cell resistances, electrode ohmic resistances, interconnect resistance, and shunting by a weakly-conductive support material were considered. For any given set of cell dimensions and characteristics, power density was maximized at an optimal cell length - the power decreased at larger cell lengths due to electrode lateral resistance loss and decreased at smaller cell lengths due to a decreasing fraction of cell active area. For cell lengths well above the optimal value, electrolyte current was often confined to the portion of the cell nearest to where the less conductive electrode (i.e. the cathode) connected to the interconnect. Assuming dimensions expected for screen printing, i.e. â20 μm thick electrodes and lateral print accuracy of â100 μm, and area specific resistance values typical of SOFCs, optimal cell lengths typically ranged from 1 to 3 mm. Shunting currents increased with decreasing cell lengths, but were found to have little effect on power density assuming partially-stabilized zirconia supports and temperatures â¤Â 800 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 147, Issues 1â2, 9 September 2005, Pages 85-94
Journal: Journal of Power Sources - Volume 147, Issues 1â2, 9 September 2005, Pages 85-94
نویسندگان
Tammy S. Lai, Scott A. Barnett,