کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1290876 973340 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimation of flooding in PEMFC gas diffusion layer by differential pressure measurement
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Estimation of flooding in PEMFC gas diffusion layer by differential pressure measurement
چکیده انگلیسی

The flooding, especially in gas diffusion layer (GDL), is one of the critical issues to put PEMFC to practical use. However, the experimental data of the flooding in GDL is so insufficient that the optimization design related to the water management for GDL has not established. In this study we developed a method to estimate the water saturation, namely the ratio of liquid water to pore volume in GDL. We fabricated a simple interdigitated cell where the supply gas is enforced to flow under rib. This structure enables to estimate the liquid water ratio in GDL by the measurement of differential pressure through the cell. We operated the cell and measured the differential pressure, and succeeded in estimating the water saturation, which changed largely with changing cell operation condition. In addition to this deferential pressure measurement, we measured the ionic resistance in polymer electrolyte membrane by ac impedance method. We evaluated and discussed the influence of the water saturation on cell voltage.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 175, Issue 2, 10 January 2008, Pages 732–738
نویسندگان
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