Results 221 to 230 of about 86,200 (263)

A dynamic equivalent circuit model for gas diffusion layers of PEMFC

IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
Proton exchange membrane fuel cell (PEMFC) is a device that converts hydrogen and oxygen to electricity. Power electronic converter is an important equipment to transfer energy from PEMFCs to loads properly. The PEMFC model suited for integrating with power electronic circuit simulation are the empirical and the equivalent circuit types.
Wattana Kaewmanee, Matheepot Phattanasak, Panarit Sethakul, Melika Hinaje, Bernard Davat   +4 more
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Formation of diffusion layers during gas nitriding

Metal Science and Heat Treatment, 1980
1. In the process of two-stage nitriding a layer with a dense zone of e carbonitrides is formed, which ensures dimensional stability of machine parts and good operating characteristics. Grinding can be replaced with light polishing. 2. The properties are best for the nitrided case with a thin (several μm) dense layer of e carbonitrides ...
J. Zysk, J. Tatsikovski, I. Sulkovski
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Water Transport in Gas Diffusion Layers of PEMFCs

ECS Transactions, 2006
We present an ex-situ analysis of water transport in the carbon paper gas diffusion layers for PEM fuel cells. We employ florescent imaging that allows us to distinguish liquid water from air through an optical microscope by seeding the water with fluorescent molecules.
Shawn Litster, Aimy Bazylak, David Sinton, Ned Djilali   +3 more
openaire   +1 more source

Surface Properties of PEMFC Gas Diffusion Layers

Journal of The Electrochemical Society, 2010
Understanding liquid-water transport phenomena inside operating proton exchange membrane fuel cells PEMFCs can only be achieved by a basic understanding of gas diffusion layer GDL wetting properties. This requires measuring and quantifying the combined properties of different GDL materials and layers.
David L. Wood, Christopher Rulison, Rodney L. Borup   +2 more
openaire   +1 more source

A method to produce a gas diffusion layer and a fuel cell comprising a gas diffusion layer

2015
The present invention discloses a method of manufacturing gas diffusion layers (GDL) with a defined pattern of hydrophobic and hydrophilic regions. The method to produce electrically conductive porous materials with distributed wettability comprises the steps of: a) Coating the external and internal surfaces of a porous base material made of carbon ...
Boillat, P., Büchi, F.N., Gubler, Lorenz, Forner Cuenca, Antoni, Padeste, Celestino   +4 more
openaire  

In Plane Permeability Measurements for Gas Diffusion Layers

3rd International Conference on Fuel Cell Science, Engineering and Technology, 2005
A radial flow device was fabricated to experimentally characterize the in-plane flow behavior of gas diffusion layers (GDL). Radial flow of gas and liquid through the GDL result in the same permeability values. Finally, four types of commercially available GDL are characterized at various levels of compression.
J. P. Feser, A. K. Prasad, S. Advani
openaire   +1 more source

Characterization of PEMFCs gas diffusion layers properties

Journal of Power Sources, 2006
Experiments have been carried out on different gas diffusion layer (GDL) materials in order to better understand the influence of this component on fuel cell performance. The study, focused on the mechanical behaviour of the GDL, shows the effect of the stress caused both by the hot-pressing and the compression in a cell on different types of carbon ...
Sylvie Escribano, Jean-François Blachot, Jérémy Ethève, Arnaud Morin, Renaut Mosdale   +4 more
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Measurement of Flooding in Gas Diffusion Layers of PEFCs

ECS Meeting Abstracts, 2006
Abstract not Available.
Haruhiko Yamada, Tatsuya Hatanaka, Yu Morimoto   +2 more
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Novel Gas Diffusion Layers with Patterned Wettability

ECS Meeting Abstracts, 2015
Inside a polymer electrolyte fuel cell (PEFC), the water management is rather complex: on one hand, the membrane needs a certain hydration state in order to ensure a sufficient proton conductivity; on the other hand, excessive water leads to blocked gas pathways with increased mass transport losses.
Antoni Forner-Cuenca, Johannes Biesdorf, Lorenz Gubler, Thomas J. Schmidt, Pierre Boillat   +4 more
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Ex Situ Characterization Method for Flooding in Gas Diffusion Layers and Membrane Electrode Assemblies With a Hydrophilic Gas Diffusion Layer

Journal of Fuel Cell Science and Technology, 2015
Proper water management is required for the operation of polymer electrolyte fuel cells (PEFCs), in order to maintain the critical balance between adequate membrane hydration and prevention of water flooding in the catalyst layer. In PEFCs, the membrane electrode assembly (MEA) is sandwiched between two gas diffusion layers (GDLs).
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