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In-Plane Effective Diffusivity in PEMFC Gas Diffusion Layers
Transport in Porous Media, 2016The in-plane effective diffusion coefficients in gas diffusion layers typically used in fuel cell electrodes were measured as a function of compression and hydrophobic polymer loading. This method was based on the transient diffusion of oxygen from air into an initially nitrogen purged porous sample and has proven to be accurate, fast, and ...
Rinat R. Rashapov, Jeff T. Gostick
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Journal of The Electrochemical Society, 2021
An improved stochastic reconstruction method for a gas diffusion layer (GDL) of proton exchange membrane fuel cell is developed to promote the accuracy in evaluating effective gas diffusivity. Carbon fibers are generated using stochastic algorithm within a representative element volume.
Lijun Zhu +5 more
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An improved stochastic reconstruction method for a gas diffusion layer (GDL) of proton exchange membrane fuel cell is developed to promote the accuracy in evaluating effective gas diffusivity. Carbon fibers are generated using stochastic algorithm within a representative element volume.
Lijun Zhu +5 more
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Characterization of Gas Diffusion Layers for PEMFC
Journal of The Electrochemical Society, 2004In proton-exchange membrane fuel cells (PEMFC), gas diffusion layers serve as current collectors that allow ready access of fuel and oxidant to the anode and the cathode catalyst surfaces, respectively. Critical properties of five commercial and one in-house gas diffusion layers have been characterized and compared to determine factors limiting the ...
Minkmas V. Williams +4 more
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Oxygen Diffusion Characteristics of Gas Diffusion Layers With Moisture
ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels, 2008The mass transfer characteristics of the gas diffusion layer (GDL) in a polymer electrolyte fuel cell (PEFC) are closely related to the performance. In this study, the oxygen diffusivity of paper and cloth type porous media, which are generally used as GDLs, were measured with respect to liquid water content, using experimental apparatus consisting of ...
Daigo Iwasaki +3 more
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Knudsen layer for tracer gas diffusion
The Physics of Fluids, 1975The diffusion of a tracer gas from a plane, porous boundary into a steady, rarefied background is investigated using the BGK model to account for collisions between the tracer and the background molecules. In a limited region close to the central part of the wall the diffusion process is nearly one-dimensional, and the resulting kinetic diffusion ...
Ytrehus, T. +2 more
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Characterization of gas diffusion layers for PEMFC
Electrochimica Acta, 2008Abstract A carbon-filled gas diffusion layer (CFGDL), which is in the configuration similar to conventional carbon cloth gas diffusion layer (GDL) coated with carbon layer on both faces, was investigated and compared with conventional carbon paper-based single-layer and dual-layer GDLs.
Han, M. +3 more
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Lattice-Gas Theory of Collective Diffusion in Adsorbed Layers
International Journal of Modern Physics B, 1997A general theory for collective diffusion in interacting lattice-gas models is presented. The theory is based on the description of the kinetics in the lattice gas by a master equation. A formal solution of the master equation is obtained using the projection-operator technique, which gives an expression for the relevant correlation functions in terms
A. Danani +3 more
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2014
The GDL is important part of polymer electrolyte membrane PEM and direct methanol DM fuel cell. There are two gas diffusion layers (cathode and anode sides) which as the name suggests diffuse reactant gases to the catalyst layer (of the electrolyte membrane).
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The GDL is important part of polymer electrolyte membrane PEM and direct methanol DM fuel cell. There are two gas diffusion layers (cathode and anode sides) which as the name suggests diffuse reactant gases to the catalyst layer (of the electrolyte membrane).
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Evaluation of porosity and thickness on effective diffusivity in gas diffusion layer
Journal of Power Sources, 2017Abstract Porosity and thickness are two key properties of GDL and both affect the transport properties of porous media. This paper focuses on the influence of the GDL microstructure on its transport properties, which will be analyzed from different samples. The results show that thickness affects permeability through the principal flow direction more
Yuan Gao, Angel Montana, Fengxiang Chen
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Gas diffusion through differently structured gas diffusion layers of PEM fuel cells
International Journal of Hydrogen Energy, 2007Abstract Proton exchange membrane fuel cell (PEMFC) gas diffusion layers (GDLs) play important parts in diffusing gas, discharging liquid water, and conducting electricity, etc. When liquid water is discharged through GDL to gas channel, there will be some pores of GDLs occupied by liquid water.
Zhigang Zhan +4 more
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