Accurate measurement of the through-plane water content of proton-exchange membranes using neutron radiography

2012 ◽  
Vol 112 (10) ◽  
pp. 104906 ◽  
Author(s):  
D. S. Hussey ◽  
D. Spernjak ◽  
A. Z. Weber ◽  
R. Mukundan ◽  
J. Fairweather ◽  
...  
Keyword(s):  
Water Content ◽  
Neutron Radiography ◽  
Proton Exchange Membranes ◽  
Proton Exchange

Elucidating Liquid Water Distribution and Removal in an Operating Proton Exchange Membrane Fuel Cell via Neutron Radiography

2009 ◽  
Vol 7 (1) ◽  
Author(s):  
Michael A. Hickner ◽  
Ken S. Chen ◽  
Nathan P. Siegel
Keyword(s):  
Flow Velocity ◽  
Water Content ◽  
Liquid Water ◽  
Water Distribution ◽  
Gas Flow ◽  
Proton Exchange Membrane ◽  
Neutron Radiography ◽  
Liquid Water Content ◽  
Proton Exchange ◽  
Gas Flow Velocity

Neutron radiography was used to quantify the steady-state water content and its distribution in a 50 cm2 operating proton exchange membrane fuel cell. It was observed that the liquid water distribution near the corners of the gas-flow channels (GFCs) is influenced by the local gas-flow velocity as determined by the cathode stoichiometric flow ratio. At low velocity, the distribution of liquid water down the channel was found to be fairly uniform with only a slight reduction in liquid water content at the exit of the GFC corners. It was further observed that as the cathode gas-flow velocity is increased, a noticeable pattern develops in which liquid water is concentrated at the entrance to the GFC corners and becomes depleted in the corner and near the exit of the corner; liquid water content again increases further down the channel away from the corners. A single-phase computational fluid dynamics (CFD) model was developed and employed to help explain the observed water-distribution patterns. Flow-fields computed from our CFD model reveal recirculation regions in the GFC corners as well as in the areas of increased local gas-flow velocity, which help explain the experimentally observed liquid water distribution.

Methods for modifying proton exchange membranes using the sol–gel process

Polymer ◽  
2005 ◽  
Vol 46 (12) ◽  
pp. 4504-4509 ◽  
Author(s):  
L.C. Klein ◽  
Y. Daiko ◽  
M. Aparicio ◽  
F. Damay
Keyword(s):  
Sol Gel ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Sol Gel Process

Crosslinked Proton Exchange Membranes with a Wider Working Temperature Based on Phosphonic Acid Functionalized Siloxane and PPO

2021 ◽  
Vol 29 (3) ◽  
pp. 199-210
Author(s):  
Zhihui Wu ◽  
Chunhui Shen ◽  
Shanjun Gao ◽  
Xi Zhu ◽  
Mingliang Zhang ◽  
...  
Keyword(s):  
Phosphonic Acid ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Working Temperature
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