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The construction of water highways of a hydrophobized gas diffusion layer via polarization behavior

The construction of water highways of a hydrophobized gas diffusion layer via polarization behavior The effect of structural ordering of the gas diffusion layer (GDL) due to nitrogen-doped graphene (N-graphene) for alkaline fuel cells (AFCs) (the most studied fuel cell technology) and metal-air fuel cells (MAFC), which are a kind of electrochemical devices capable of directly converting the chemical energy stored in metals into fuel, has been studied. Two GDLs were made using two different carbon morphologies with a clear difference in particle sizes. The size and number of particles are an important consideration since the GDL are assumed to be placed next to the catalyst bed in the fuel cell. The GDL contains a porous carbon substrate, which is made in one case of the N-graphene and in another case of activated carbon. N-graphene was obtained in a free-standing position using nitrogen plasma generated by a DC plasma torch. To ensure gas supply and water drainage the GDL substrate must be hydrophobized. Polytetrafluoroethylene (PTFE) fibers were obtained on the surface of both layers. In order to understand the gas diffusion properties of the fabricated GDLs, their polarization behavior was studied. Polarization curves, obtained by means of modeling, fully correspond to experimental data. An advantage of the layered structure of GDL based on N-graphene is demonstrated.Graphical Abstract[graphic not available: see fulltext] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Electrochemistry Springer Journals

The construction of water highways of a hydrophobized gas diffusion layer via polarization behavior

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Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature B.V. 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
0021-891X
eISSN
1572-8838
DOI
10.1007/s10800-023-01914-y
Publisher site
See Article on Publisher Site

Abstract

The effect of structural ordering of the gas diffusion layer (GDL) due to nitrogen-doped graphene (N-graphene) for alkaline fuel cells (AFCs) (the most studied fuel cell technology) and metal-air fuel cells (MAFC), which are a kind of electrochemical devices capable of directly converting the chemical energy stored in metals into fuel, has been studied. Two GDLs were made using two different carbon morphologies with a clear difference in particle sizes. The size and number of particles are an important consideration since the GDL are assumed to be placed next to the catalyst bed in the fuel cell. The GDL contains a porous carbon substrate, which is made in one case of the N-graphene and in another case of activated carbon. N-graphene was obtained in a free-standing position using nitrogen plasma generated by a DC plasma torch. To ensure gas supply and water drainage the GDL substrate must be hydrophobized. Polytetrafluoroethylene (PTFE) fibers were obtained on the surface of both layers. In order to understand the gas diffusion properties of the fabricated GDLs, their polarization behavior was studied. Polarization curves, obtained by means of modeling, fully correspond to experimental data. An advantage of the layered structure of GDL based on N-graphene is demonstrated.Graphical Abstract[graphic not available: see fulltext]

Journal

Journal of Applied Electrochemistry – Springer Journals

Published: Nov 1, 2023

Keywords: Fuel cell; Gas diffusion layer; Hydrophobic pattern structure; Analysis of size and number of particles

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