کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1291704 | 973370 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An approach to measuring spatially resolved water crossover coefficient in a polymer electrolyte fuel cell
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: An approach to measuring spatially resolved water crossover coefficient in a polymer electrolyte fuel cell An approach to measuring spatially resolved water crossover coefficient in a polymer electrolyte fuel cell](/preview/png/1291704.png)
چکیده انگلیسی
This paper reports on an experimental approach to measuring the water crossover coefficient distribution for the first time. A straight-channel PEFC of 6Â cm2 segmented into 10 pieces along the reactant flow direction has been developed. The instrumented cell, combining the functions of current collection and gas sampling with one pin for each segment, is capable of measuring current and species distributions simultaneously from a single experiment. The two distribution data are subsequently combined in a material balance analysis to yield the net water transport coefficient distribution through the membrane. For fully humidified anode and partially humidified cathode, the net water transport coefficient is found to range from 0.47 to 0.025, and the electro-osmotic drag dominates water transport through the membrane. For partially humidified anode and cathode, the net water transport coefficient lies between 0.19 and â0.24, with the negative value indicating dominant back diffusion.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 164, Issue 1, 10 January 2007, Pages 134-140
Journal: Journal of Power Sources - Volume 164, Issue 1, 10 January 2007, Pages 134-140
نویسندگان
G.Q. Lu, F.Q. Liu, Chao-Yang Wang,