Transport parameters for the modelling of water transport in ionomer membranes for PEM-fuel cells

2004 ◽  
Vol 49 (11) ◽  
pp. 1731-1742 ◽  
Author(s):  
Frank Meier ◽  
Gerhart Eigenberger
Keyword(s):  
Fuel Cells ◽  
Water Transport ◽  
Pem Fuel Cells ◽  
Transport Parameters ◽  
Ionomer Membranes

Effect of Vibration on the Liquid Water Transport of PEM Fuel Cells

2009 ◽  
Author(s):  
Luis Breziner ◽  
Peter Strahs ◽  
Parsaoran Hutapea
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Water Transport ◽  
Liquid Water ◽  
Pem Fuel Cells ◽  
Gas Diffusion ◽  
Cell Performance ◽  
Sinusoidal Vibration ◽  
Fuel Cell Performance ◽  
Liquid Water Transport

The objective of this research is to analyze the effects of vibration on the performance of hydrogen PEM fuel cells. It has been reported that if the liquid water transport across the gas diffusion layer (GDL) changes, so does the overall cell performance. Since many fuel cells operate under a vibrating environment –as in the case of automotive applications, this may influence the liquid water concentration across the GDL at different current densities, affecting the overall fuel cell performance. The problem was developed in two main steps. First, the basis for an analytical model was established using current models for water transport in porous media. Then, a series of experiments were carried, monitoring the performance of the fuel cell for different parameters of oscillation. For sinusoidal vibration at 10, 20 and 50Hz (2 g of magnitude), a decrease in the fuel cell performance by 2.2%, 1.1% and 1.3% was recorded when compared to operation at no vibration respectively. For 5 g of magnitude, the fuel cell reported a drop of 5.8% at 50 Hz, whereas at 20 Hz the performance increased by 1.3%. Although more extensive experimentation is needed to identify a relationship between magnitude and frequency of vibration affecting the performance of the fuel cell as well as a throughout examination of the liquid water formation in the cathode, this study shows that sinusoidal vibration, overall, affects the performance of PEM fuel cells.

Chemical Interactions in Ionomers and Ionomer Membranes Containing Metal particles and Ions

1999 ◽  
Vol 575 ◽  
Author(s):  
William M. Risen
Keyword(s):  
Fuel Cells ◽  
Metal Ions ◽  
Small Molecules ◽  
Distinct Species ◽  
Pem Fuel Cells ◽  
Metal Particles ◽  
Metal Carbonyls ◽  
Ionomer Membranes ◽  
Low Temperature Fuel Cells

ABSTRACTIonomer membranes are employed in PEM fuel cells as the proton conducting element, but they also hold potential for catalytic applications in both hydrogen based and other low temperature fuel cells. In these applications the reactions of H2, CO, 02, H20 and other small molecules with metal-based catalysts are important to consider. Reactions of these species with perfluorocarbonsulfonic acid based ionomers (PFSA), of which Nafionsa are prototypical, containing Rh, Ru, Pt and other metal ions and particles are shown. Metal carbonyls form with metal ions that have been reduced in situ to reduced valence ions or to metal particles, by the combination of CO and H2O or with H2 directly. Metal nitrogen complexes also can be formed. In addition, the interactions of dissimilar metal ions leads to distinct species with NO or CO, for example, that are different from the products with either ion separately.

Internal Humidification in PEM Fuel Cells Using Wick Based Water Transport

2015 ◽  
Vol 162 (9) ◽  
pp. F1000-F1010 ◽  
Author(s):  
Ramendra Pandey ◽  
Harshal Agarwal ◽  
B. Saravanan ◽  
P. Sridhar ◽  
Santoshkumar D. Bhat
Keyword(s):  
Fuel Cells ◽  
Water Transport ◽  
Pem Fuel Cells

Liquid Water Transport in PEM Fuel Cells

2019 ◽  
Vol 12 (1) ◽  
pp. 67-79 ◽  
Author(s):  
Jay B. Benziger ◽  
Tamara Whitaker ◽  
Erin Kimball ◽  
Ioannis G. Kevrekidis
Keyword(s):  
Fuel Cells ◽  
Water Transport ◽  
Liquid Water ◽  
Pem Fuel Cells ◽  
Liquid Water Transport

Non-isothermal transient modeling of water transport in PEM fuel cells

2007 ◽  
Vol 165 (1) ◽  
pp. 232-243 ◽  
Author(s):  
Hao Wu ◽  
Peter Berg ◽  
Xianguo Li
Keyword(s):  
Fuel Cells ◽  
Water Transport ◽  
Pem Fuel Cells ◽  
Transient Modeling

Investigation of water transport and its effect on performance of high-temperature PEM fuel cells

2014 ◽  
Vol 149 ◽  
pp. 271-277 ◽  
Author(s):  
Caizhi Zhang ◽  
Lan Zhang ◽  
Weijiang Zhou ◽  
Youyi Wang ◽  
Siew Hwa Chan
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Water Transport ◽  
Pem Fuel Cells ◽  
High Temperature Pem
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