Status and Research Subjects of Polymer Electrolyte Fuel Cells.
نویسندگان
چکیده
منابع مشابه
Catalyst supports for polymer electrolyte fuel cells.
A major challenge in obtaining long-term durability in fuel cells is to discover catalyst supports that do not corrode, or corrode much more slowly than the current carbon blacks used in today's polymer electrolyte membrane fuel cells. Such materials must be sufficiently stable at low pH (acidic conditions) and high potential, in contact with the polymer membrane and under exposure to hydrogen ...
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In this review, we have examined the different models for polymer-electrolyte fuel cells operating with hydrogen. The major focus has been on transport of the various species within the fuel cell. The different regions of the fuel cell were examined, and their modeling methodologies and equations were elucidated. In particular, the 1-D fuel-cell sandwich was discussed thoroughly because it is t...
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For achieving stringent design & performance objectives in energy systems, it becomes necessary to develop holistic integrated models as well as, ascertain the level of details required within each sub-system, for accurate physical description and system optimization. This requires multi-scale modeling, which involves description of atomistic, molecular, mesoscopic, continuum, device, and plant...
متن کاملDrops, Slugs, and Flooding in Polymer Electrolyte Membrane Fuel Cells
The process of flooding has been examined with a single-channel fuel cell that permits direct observation of liquid water motion and local current density. As product water flows through the largest pores in the hydrophobic GDL, drops detach from the surface, aggregate, and form slugs. Flooding in polymer electrolyte membrane (PEM) fuel cells occurs when liquid water slugs accumulate in the gas...
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ژورنال
عنوان ژورنال: membrane
سال: 2003
ISSN: 0385-1036,1884-6440
DOI: 10.5360/membrane.28.2