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@ARTICLE{Froning:889819,
      author       = {Froning, Dieter and Reimer, Uwe and Lehnert, Werner},
      title        = {{I}nhomogeneous distribution of polytetraflourethylene in
                      gas diffusion layers of polymer electrolyte fuel cells},
      journal      = {Transport in porous media},
      volume       = {136},
      issn         = {0169-3913},
      address      = {Dordrecht [u.a.]},
      publisher    = {Springer Science + Business Media B.V},
      reportid     = {FZJ-2021-00432},
      pages        = {843-862},
      year         = {2021},
      abstract     = {Polymer 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.},
      cin          = {IEK-14},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-14-20191129},
      pnm          = {135 - Fuel Cells (POF3-135) / 1231 - Electrochemistry for
                      Hydrogen (POF4-123)},
      pid          = {G:(DE-HGF)POF3-135 / G:(DE-HGF)POF4-1231},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000609088000001},
      doi          = {10.1007/s11242-021-01542-0},
      url          = {https://juser.fz-juelich.de/record/889819},
}