Identification of liquid water constraints in micro polymer electrolyte fuel cells without gas diffusion layers

2010 ◽  
Vol 55 (8) ◽  
pp. 2932-2938 ◽  
Author(s):  
Bernhard C. Seyfang ◽  
Pierre Boillat ◽  
Franziska Simmen ◽  
Stefan Hartmann ◽  
Gabriel Frei ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Liquid Water ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cells ◽  
Gas Diffusion Layers ◽  
Diffusion Layers

scholarly journals Optimal Image Denoising for In Situ X-ray Tomographic Microscopy of Liquid Water in Gas Diffusion Layers of Polymer Electrolyte Fuel Cells

2020 ◽  
Vol 167 (10) ◽  
pp. 104505 ◽  
Author(s):  
Hong Xu ◽  
Minna Bührer ◽  
Federica Marone ◽  
Thomas J. Schmidt ◽  
Felix N. Büchi ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Image Denoising ◽  
Liquid Water ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cells ◽  
Gas Diffusion Layers ◽  
X Ray ◽  
Diffusion Layers

Investigation of liquid water in gas diffusion layers of polymer electrolyte fuel cells using X-ray tomographic microscopy

2011 ◽  
Vol 56 (5) ◽  
pp. 2254-2262 ◽  
Author(s):  
Reto Flückiger ◽  
Federica Marone ◽  
Marco Stampanoni ◽  
Alexander Wokaun ◽  
Felix N. Büchi
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Liquid Water ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cells ◽  
Gas Diffusion Layers ◽  
X Ray ◽  
Diffusion Layers

scholarly journals Inhomogeneous Distribution of Polytetrafluorethylene in Gas Diffusion Layers of Polymer Electrolyte Fuel Cells

2021 ◽  
Vol 136 (3) ◽  
pp. 843-862
Author(s):  
Dieter Froning ◽  
Uwe Reimer ◽  
Werner Lehnert
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Diffusion Layer ◽  
Liquid Water ◽  
Catalyst Layer ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cells ◽  
Inhomogeneous Distribution ◽  
Gas Diffusion Layers ◽  
Diffusion Layers

AbstractPolymer electrolyte fuel cells require gas diffusion layers that can efficiently distribute the feeding gases from the channel structure to the catalyst layer on both sides of the membrane. On the cathode side, these layers must also allow the transport of liquid product water in a counter flow direction from the catalyst layer to the air channels where it can be blown away by the air flow. In this study, two-phase transport in the fibrous structures of a gas diffusion layer was simulated using the lattice Boltzmann method. Liquid water transport is affected by the hydrophilic treatment of the fibers. Following the assumption that polytetrafluorethylene is preferably concentrated at the crossings of fibers, the impact of its spatial distribution is analyzed. Both homogeneous and inhomogeneous distribution is investigated. The concentration of polytetrafluorethylene in the upstream region is of advantage for the fast transport of liquid water through the gas diffusion layer. Special attention is given to the topmost fiber layer. Moreover, polytetrafluorethylene covering the fibers leads to large contact angles.

scholarly journals Modeling Gas Diffusion Layers in Polymer Electrolyte Fuel Cells Using a Continuum-Based Pore-Network Formulation

2020 ◽  
Vol 97 (7) ◽  
pp. 615-626
Author(s):  
Pablo A. García-Salaberri ◽  
Iryna V. Zenyuk ◽  
Jeff T. Gostick ◽  
Adam Z. Weber
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Pore Network ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cells ◽  
Gas Diffusion Layers ◽  
Diffusion Layers

Anisotropic properties of gas transport in non-woven gas diffusion layers of polymer electrolyte fuel cells

2020 ◽  
Vol 452 ◽  
pp. 227828
Author(s):  
Dieter Froning ◽  
Monika Drakselová ◽  
Anna Tocháčková ◽  
Roman Kodým ◽  
Uwe Reimer ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Gas Transport ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cells ◽  
Gas Diffusion Layers ◽  
Anisotropic Properties ◽  
Diffusion Layers
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