کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
181191 | 459397 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Combined local current distribution measurements and high resolution neutron radiography of operating Direct Methanol Fuel Cells
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The current and fluid distribution in Direct Methanol Fuel Cells (DMFCs) was investigated in situ by means of combined high resolution neutron radiography and locally resolved current distribution measurements. The used neutron radiography set-up allows high spatial resolutions down to 70 μm at the full test cell area. A local formation of water droplets in the cathode flow field channels could be observed. Strongly inhomogeneous current distributions during cathodic flooding processes result in a performance loss of up to 30% of the initial value. Single CO2 bubbles can be observed at low current densities. The water and current distribution during bi-functional operation of a DMFC was measured for the first time.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 11, Issue 8, August 2009, Pages 1606–1609
Journal: Electrochemistry Communications - Volume 11, Issue 8, August 2009, Pages 1606–1609
نویسندگان
Alexander Schröder, Klaus Wippermann, Jürgen Mergel, Werner Lehnert, Detlef Stolten, Tilman Sanders, Thorsten Baumhöfer, Dirk U. Sauer, Ingo Manke, Nikolay Kardjilov, André Hilger, Jana Schloesser, John Banhart, Christoph Hartnig,