Relative Humidity Dependence of Pt Utilization in Polymer Electrolyte Fuel Cell Electrodes: Effects of Electrode Thickness, Ionomer-to-Carbon Ratio, Ionomer Equivalent Weight, and Carbon Support

2011 ◽  
Vol 158 (5) ◽  
pp. B467 ◽  
Author(s):  
Kazuma Shinozaki ◽  
Haruhiko Yamada ◽  
Yu Morimoto
Keyword(s):  
Fuel Cell ◽  
Relative Humidity ◽  
Polymer Electrolyte ◽  
Carbon Support ◽  
Polymer Electrolyte Fuel Cell ◽  
Equivalent Weight ◽  
Electrode Thickness ◽  
Fuel Cell Electrodes ◽  
Pt Utilization ◽  
Humidity Dependence

Electromechanical diagnostic method for monitoring cracks in polymer electrolyte fuel cell electrodes

2017 ◽  
Vol 42 (16) ◽  
pp. 11644-11653 ◽  
Author(s):  
Kyung-Lim Jang ◽  
Sanwi Kim ◽  
Byeong-Heon Jeong ◽  
Jong-Gil Oh ◽  
Bo Ki Hong ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Diagnostic Method ◽  
Polymer Electrolyte Fuel Cell ◽  
Fuel Cell Electrodes

Effect of flow pattern of gas and cooling water on relative humidity distribution in polymer electrolyte fuel cell

2006 ◽  
Vol 162 (1) ◽  
pp. 94-104 ◽  
Author(s):  
Gen Inoue ◽  
Takashi Yoshimoto ◽  
Yosuke Matsukuma ◽  
Masaki Minemoto ◽  
Hideki Itoh ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Relative Humidity ◽  
Flow Pattern ◽  
Polymer Electrolyte ◽  
Cooling Water ◽  
Polymer Electrolyte Fuel Cell

Influence of carbon support on the performance of platinum based oxygen reduction catalysts in a polymer electrolyte fuel cell

2007 ◽  
Vol 37 (12) ◽  
pp. 1429-1437 ◽  
Author(s):  
Jörg Kaiser ◽  
Pavel A. Simonov ◽  
Vladimir I. Zaikovskii ◽  
Christoph Hartnig ◽  
Ludwig Jörissen ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Oxygen Reduction ◽  
Polymer Electrolyte ◽  
Carbon Support ◽  
Polymer Electrolyte Fuel Cell ◽  
Oxygen Reduction Catalysts ◽  
Reduction Catalysts

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.

Numerical analysis of relative humidity distribution in polymer electrolyte fuel cell stack including cooling water

2006 ◽  
Vol 162 (1) ◽  
pp. 81-93 ◽  
Author(s):  
Gen Inoue ◽  
Takashi Yoshimoto ◽  
Yosuke Matsukuma ◽  
Masaki Minemoto ◽  
Hideki Itoh ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Numerical Analysis ◽  
Relative Humidity ◽  
Polymer Electrolyte ◽  
Cooling Water ◽  
Polymer Electrolyte Fuel Cell ◽  
Fuel Cell Stack
Sign in / Sign up

Export Citation Format

Share Document