Characteristics and performance of membrane electrode assemblies with operating conditions in polymer electrolyte membrane fuel cell

2010 ◽  
Vol 56 (2) ◽  
pp. 717-721 ◽  
Author(s):  
Yong-Hun Cho ◽  
Sung Jong Yoo ◽  
In-Su Park ◽  
Tae-Yeol Jeon ◽  
Yoon-Hwan Cho ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Operating Conditions ◽  
Membrane Electrode ◽  
Electrolyte Membrane ◽  
Membrane Electrode Assemblies ◽  
Electrode Assemblies ◽  
And Performance

Influence of Ammonia on Membrane-Electrode Assemblies in Polymer Electrolyte Fuel Cells

2009 ◽  
Author(s):  
Xiaoyu Zhang ◽  
Joshua Preston ◽  
Ugur Pasaogullari ◽  
Trent Molter
Keyword(s):  
Polymer Electrolyte ◽  
Electrochemical Impedance ◽  
Polymer Electrolyte Membrane ◽  
Catalyst Layer ◽  
Polymer Electrolyte Fuel Cell ◽  
Membrane Electrode ◽  
Electrolyte Membrane ◽  
Catalyst Layers ◽  
Electrode Assemblies ◽  
And Performance

An experimental investigation of contamination of polymer electrolyte fuel cell (PEFC) membranes and catalyst layers with ammonia (NH3) is reported. Cyclic voltammetry (CV) scans and electrochemical impedance spectroscopy (EIS) analyses show that trace amounts of ammonia can significantly contaminate both the polymer electrolyte membrane (PEM) and the catalyst layers. The results show that the catalyst layer contamination can be reversed under certain conditions, while the membrane recovery tends to be much slower, and permanent effects of ammonia contamination is observed. Mechanisms of contamination of the polymer electrolyte and catalyst layers, and performance degradation of the PEFC are also postulated.

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