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- Title
The construction of water highways of a hydrophobized gas diffusion layer via polarization behavior.
- Authors
Shavelkina, M. B.; Ivanov, P. P.; Tuganov, V. N.; Valyano, G. E.
- 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.
- Subjects
ALKALINE fuel cells; POLYTEF; ROAD construction; FUEL cells; PLASMA torch; METAL-base fuel; NITROGEN plasmas
- Publication
Journal of Applied Electrochemistry, 2023, Vol 53, Issue 11, p2125
- ISSN
0021-891X
- Publication type
Article
- DOI
10.1007/s10800-023-01914-y