Heat and Mass Transfer in Polymer Electrolyte Fuel Cells in Ultra-Low Humidity Operation

2019 ◽  
Vol 25 (1) ◽  
pp. 323-332 ◽  
Author(s):  
Richard S. Fu ◽  
Xiaoyu Zhang ◽  
Ugur Pasaogullari
Keyword(s):  
Mass Transfer ◽  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Heat And Mass Transfer ◽  
Polymer Electrolyte Fuel Cells ◽  
Low Humidity

Distributed Performance of Polymer Electrolyte Fuel Cells under Low-Humidity Conditions

2005 ◽  
Vol 152 (11) ◽  
pp. A2114 ◽  
Author(s):  
Q. Dong ◽  
M. M. Mench ◽  
S. Cleghorn ◽  
U. Beuscher
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells ◽  
Low Humidity

Fullerene Composite Membranes for Low Humidity Operation of Polymer Electrolyte Fuel Cells : Part III

2019 ◽  
Vol 1 (6) ◽  
pp. 183-188
Author(s):  
Hengbin Wang ◽  
Arun Venkatesan ◽  
Ken Tasaki ◽  
Galen Stucky ◽  
Fred Wudl ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Composite Membranes ◽  
Polymer Electrolyte Fuel Cells ◽  
Low Humidity

Porous Materials as Fluid Distributors in Polymer Electrolyte Fuel Cells: A Computational Performance Analysis

2003 ◽  
Author(s):  
S. M. Senn ◽  
D. Poulikakos
Keyword(s):  
Mass Transfer ◽  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Reaction Rates ◽  
Flow Fields ◽  
Polymer Electrolyte Fuel Cells ◽  
Three Dimensions ◽  
Strong Argument ◽  
Computational Performance ◽  
The Impact

Commonly used ribbed flow-fields such as parallel and serpentine flow-fields in polymer electrolyte fuel cells (PEFC) exhibit limited mass transfer to the part of the diffusion and catalyst layer which is not covered by flow channels, leading to a considerably reduced reactant concentration and increased overpotential losses under the current collector shoulders. In this study, a novel concept is investigated, according to which the traditional ribbed flow delivery systems are replaced with permeable porous fluid distributors, which circumvent drawbacks such as those mentioned earlier. A complex mathematical model, including the conservation of mass, momentum, energy, species and electric current, using Butler-Volmer kinetics for electrochemical reaction rates, is numerically solved in three dimensions, to investigate the impact of different flow configurations on the performance of hydrogen fuel cells. It is found that cells with porous gas distributors generate substantially higher current densities and therefore are more advantageous with respect to mass transfer. Reduction in stack weight is another strong argument for using porous flow distributors in future applications.

High-Voltage Operation of Polymer Electrolyte Fuel Cells under Low Humidity Condition with Pt–Co Catalyst

2010 ◽  
Vol 43 (7) ◽  
pp. 623-626
Author(s):  
Hiroshi Ishikawa ◽  
Takanori Tamaki ◽  
Taichi Ito ◽  
Hidenori Ohashi ◽  
Takeo Yamaguchi
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
High Voltage ◽  
Polymer Electrolyte Fuel Cells ◽  
Co Catalyst ◽  
Humidity Condition ◽  
Low Humidity
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