X-ray Tomographic Investigation of Water Distribution in Polymer Electrolyte Membrane Fuel Cells with Different Gas Diffusion Media

2016 ◽  
Vol 72 (8) ◽  
pp. 99-106 ◽  
Author(s):  
S. S. Alrwashdeh ◽  
H. Markotter ◽  
J. Haussmann ◽  
J. Scholta ◽  
A. Hilger ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Water Distribution ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion ◽  
X Ray ◽  
Electrolyte Membrane ◽  
Diffusion Media

Synchrotron X-ray tomography for investigations of water distribution in polymer electrolyte membrane fuel cells

2011 ◽  
Vol 196 (12) ◽  
pp. 5250-5255 ◽  
Author(s):  
Ph. Krüger ◽  
H. Markötter ◽  
J. Haußmann ◽  
M. Klages ◽  
T. Arlt ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Water Distribution ◽  
Polymer Electrolyte Membrane ◽  
X Ray ◽  
Electrolyte Membrane

Visualization of GDL Deformation by Freezing of Water Using X-Ray Radiography

2010 ◽  
Author(s):  
Jongrok Kim ◽  
Junho Je ◽  
Massoud Kaviany ◽  
Sang Young Son ◽  
Moo Hwan Kim
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Chemical Reactions ◽  
Diffusion Layer ◽  
Power Output ◽  
Operating Temperature ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion ◽  
X Ray ◽  
Electrolyte Membrane

During operation of Polymer Electrolyte Membrane Fuel Cells (PEMFCs), electro-chemical reactions generate water, which exists as a liquid because of the PEFMC’s low operating temperature. The water remains in the PEFMC after it is turned off. During the winter this water can freeze; associated increase in its volume deforms the gas diffusion layer (GDL). The deformed GDL reduces the cell’s power output and durability. In this investigation, X-ray microscopy was used demonstrate that water freezing changed the geometry of GDL by water freezing.

Synchrotron X-Ray Investigation of Membrane Water Distribution in Polymer Electrolyte Membrane Fuel Cell Applications

2017 ◽  
Author(s):  
Rupak Banerjee ◽  
Chuzhang Han ◽  
Nan Ge ◽  
Aimy Bazylak
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Diffusion Layer ◽  
Current Density ◽  
Water Distribution ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion ◽  
Cell Performance ◽  
X Ray ◽  
Electrolyte Membrane

Water management is a critical component of extracting optimum performance and efficiency from polymer electrolyte membrane (PEM) fuel cells. During fuel cell operation, a balance needs to be maintained between excess water blocking the reactant pathways through the gas diffusion layer, and the requirement for membrane hydration. The ionic conductivity through the membrane depends strongly on the hydration of the membrane. The reactant gases in a PEM fuel cell are supplied through a humidification system to maintain appropriate levels of hydration in the membrane. The removal of the anode humidifier would significantly reduce the balance of plant costs and reduce the volume required for the fuel cell in an automotive setting. However, removing the anode humidification system could have adverse effects on membrane hydration and on fuel cell performance. In this study, the anode humidification was varied and the cell performance and the membrane resistance were monitored. Synchrotron X-ray radiography was conducted simultaneously to visualize the water distribution in the membrane, the gas diffusion layer, and the associated interfaces. It was observed that the anode humidification had a strong impact on the performance of the fuel cell, with the dry condition leading to voltage instability at a current density below 1.0 A/cm2. The membrane water content was observed to decrease with increases in operating current density.

scholarly journals Wettability and capillary behavior of fibrous gas diffusion media for polymer electrolyte membrane fuel cells

2009 ◽  
Vol 194 (1) ◽  
pp. 433-444 ◽  
Author(s):  
Jeff T. Gostick ◽  
Marios A. Ioannidis ◽  
Michael W. Fowler ◽  
Mark D. Pritzker
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion ◽  
Electrolyte Membrane ◽  
Diffusion Media

Design of properties and performances of innovative gas diffusion media for polymer electrolyte membrane fuel cells

2015 ◽  
Vol 78 ◽  
pp. 517-525 ◽  
Author(s):  
Saverio Latorrata ◽  
Riccardo Balzarotti ◽  
Paola Gallo Stampino ◽  
Cinzia Cristiani ◽  
Giovanni Dotelli ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Gas Diffusion ◽  
Electrolyte Membrane ◽  
Diffusion Media
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