کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9825053 | 1521505 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Water diffusion measurement in fuel-cell SPE membrane by NMR
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Water diffusion measurement in fuel-cell SPE membrane by NMR Water diffusion measurement in fuel-cell SPE membrane by NMR](/preview/png/9825053.png)
چکیده انگلیسی
In this article, water behaviors in solid polymer electrolyte (SPE) membrane that is employed for polymer electrolyte fuel cells (PEFC) are discussed because understanding of water transport in SPE membrane is of great importance in terms of water management in the membrane to maintain performance of PEFC. Firstly, self-diffusion coefficients of water in the SPE membrane were measured using pulsed field gradient spin echo NMR measurement. Two types of SPE membrane, Nafion® and Flemion®, were investigated at various water contents. It is shown that measured self-diffusion coefficients increased with water content in the membrane, although no distinct difference was observed among both membranes. Furthermore, it is demonstrated that the NMR imaging technique can be applied to probe water behaviors in the membrane assembled in fuel cell under operation. It is observed that the membrane gradually dried after the fuel cell began to be operated, resulting in decreasing output current.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 30, Issues 2â4, FebruaryâMarch 2005, Pages 235-245
Journal: Energy - Volume 30, Issues 2â4, FebruaryâMarch 2005, Pages 235-245
نویسندگان
S. Tsushima, K. Teranishi, S. Hirai,