scholarly journals High Resolution Neutron Imaging of Water in the Polymer Electrolyte Fuel Cell Membrane

2019 ◽  
Vol 25 (1) ◽  
pp. 505-512 ◽  
Author(s):  
Partha P. Mukherjee ◽  
Rangachary Mukundan ◽  
Jacob S. Spendelow ◽  
John R. Davey ◽  
Rodney Borup ◽  
...  
Keyword(s):  
Fuel Cell ◽  
High Resolution ◽  
Cell Membrane ◽  
Polymer Electrolyte ◽  
Neutron Imaging ◽  
Polymer Electrolyte Fuel Cell

Characterization of the Fracture Energy of a PFCB/PVDF Polymer Electrolyte Fuel Cell Membrane Using a Knife Slit Test

2012 ◽  
Author(s):  
Ashley R. Gordon ◽  
Michael W. Ellis ◽  
David A. Dillard ◽  
Scott W. Case ◽  
Robert B. Moore ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Relative Humidity ◽  
Cell Membrane ◽  
Fracture Energy ◽  
Polymer Electrolyte ◽  
Polymer Blend ◽  
Environmental Conditions ◽  
Polyvinylidene Fluoride ◽  
Polymer Electrolyte Fuel Cell ◽  
Fracture Tests

Polymer electrolyte membranes (PEM) undergo hygrothermal stress cycling in an operating fuel cell which may lead to pinhole or crack formation and propagation resulting in membrane failure. The fracture energy of a material, measured by fracture tests, is the energy needed for a crack to propagate throughout the material. In this study, the fracture energy of a promising novel fuel cell membrane comprised of a blend of a sulfonated perfluorocyclobutane (PFCB) block copolymer and polyvinylidene fluoride (PVDF) is investigated in various environmental conditions using a knife slit test. Fracture energies determined using the knife slit test have been shown to be several orders of magnitude lower, and therefore closer to the intrinsic fracture energy of a material, than those found by other fracture tests of related membranes. It is believed that the intrinsic fracture energy can give insight into the fracture resistance and durability of the polymer blend membrane. A polymer blend of 70% PFCB and 30% PVDF was tested at dry and nominally 10% relative humidity conditions at 40, 70, and 90°C, as well as at 70°C and nominally 50% relative humidity, to assess the effect of environmental conditions on fracture energy. Results show that the PFCB/PVDF blend had comparable fracture energy to a baseline fuel cell material, Nafion® NRE 211. In addition, the fracture energy of the blend was found to lie between that of the PFCB and PVDF components.

Through-Plane Water Distribution in a Polymer Electrolyte Fuel Cell at Various Operating Temperatures

2010 ◽  
Author(s):  
Yun Wang ◽  
Ken S. Chen
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Water Distribution ◽  
Electrochemical Reaction ◽  
Neutron Imaging ◽  
Polymer Electrolyte Fuel Cell ◽  
Two Phase ◽  
Model Predictions ◽  
Higher Temperature ◽  
Operating Temperatures

A multi-dimensional mathematical model is formulated for simulating the transport and electrochemical reaction phenomena in a polymer electrolyte fuel cell (PEFC). The model describes the two-phase flows, electrochemical reaction kinetics, species transport, and heat transfer, as well as their intrinsic couplings within a PEFC. Two-dimensional model predictions are computed for the two typical operating temperatures at 40 and 80 °C. Computed results reveal that liquid water level may be lower at the higher temperature operation due to water vapor phase diffusion. Detailed water and temperature distributions are displayed to explain the water and heat transport and their interaction. The computed water-content profiles are compared with available experimental data obtained by neutron imaging.

Neutron Imaging of Isothermal Sub-Zero Degree Celsius Cold-Starts of a Polymer Electrolyte Fuel Cell (PEFC)

2019 ◽  
Vol 41 (1) ◽  
pp. 363-370 ◽  
Author(s):  
Pierre Oberholzer ◽  
Pierre Boillat ◽  
Raphael Siegrist ◽  
Raffaella Perego ◽  
Anders Kaestner ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Neutron Imaging ◽  
Polymer Electrolyte Fuel Cell ◽  
Zero Degree ◽  
Cold Starts

scholarly journals APPLICATION OF SULFONATED POLYSTYRENE IN POLYMER ELECTROLYTE FUEL CELL

2018 ◽  
Vol 20 (1) ◽  
pp. 44
Author(s):  
Sunit Hendrana ◽  
Erwin Erwin ◽  
Krisman Krisman ◽  
Syakbaniah Syakbaniah ◽  
Isna’im Isna’im ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Cell Membrane ◽  
Small Molecules ◽  
Polymer Electrolyte ◽  
Membrane Electrode Assembly ◽  
Polymer Electrolyte Fuel Cell ◽  
Membrane Electrode ◽  
Sulfonate Group ◽  
Binding Agent ◽  
Sulfonated Polystyrene

APPLICATION OF SULFONATED POLYSTYRENE IN POLYMER ELECTROLYTE FUEL CELL. Sulfonated polystyrene (SPS) is polyelectrolyte solid that widely used in many aplications. In this works SPS is applied for some parts of polymer electrolyte fuel cell membrane due sulfonate group available in the structure. The investigation involve the application for membrane with addition of small molecules, i.e. benzimidazole and evaluating its microstructure and performance. Application of SPS solution as binding agent in MEA will also be presented.  The results show that when using SPS as fuel cell membrane, the additon of small molecules such as benzimidazole would modify its microstrusture as well as improve its ion conductivity. Meanwhile, some improvement still required for application of SPS solution as binding agent for preparation of Membrane Electrode Assembly or MEA.

Quantification of Temperature Driven Flow in a Polymer Electrolyte Fuel Cell Using High-Resolution Neutron Radiography

2011 ◽  
Vol 158 (6) ◽  
pp. B717 ◽  
Author(s):  
M. C. Hatzell ◽  
A. Turhan ◽  
S. Kim ◽  
D. S. Hussey ◽  
D. L. Jacobson ◽  
...  
Keyword(s):  
Fuel Cell ◽  
High Resolution ◽  
Polymer Electrolyte ◽  
Neutron Radiography ◽  
Polymer Electrolyte Fuel Cell
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