کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
180475 | 459381 | 2010 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of cathode flow field surface properties on the local and time-dependent performance of direct methanol fuel cells
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The influence of cathode flow field wettability on the local and time-dependent performance of DMFCs was investigated by galvanostatic measurements of local current distribution, cell voltage and pressure drop along the cathode channels. The cathode flow fields made of graphite were either untreated, hydrophobic or hydrophilic. Drop shape analysis yielded contact angles in the descending order hydrophobic (126.8°), untreated (115.9°) and hydrophilic (26.2°). Especially at low air stoichiometry (λair = 2), hydrophilic cathode flow fields are advantageous with regard to higher power densities, suppression of local current fluctuations and substantial reduction of pressure drop along the cathode channels.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 12, Issue 10, October 2010, Pages 1318–1321
Journal: Electrochemistry Communications - Volume 12, Issue 10, October 2010, Pages 1318–1321
نویسندگان
Alexander Schröder, Klaus Wippermann, Gerald Zehl, Detlef Stolten,