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@ARTICLE{Olbrich:908440,
      author       = {Olbrich, W. and Kadyk, T. and Sauter, U. and Eikerling, M.},
      title        = {{R}eview—{W}etting {P}henomena in {C}atalyst {L}ayers of
                      {PEM} {F}uel {C}ells: {N}ovel {A}pproaches for {M}odeling
                      and {M}aterials {R}esearch},
      journal      = {Journal of the Electrochemical Society},
      volume       = {169},
      number       = {5},
      issn         = {0013-4651},
      address      = {Bristol},
      publisher    = {IOP Publishing},
      reportid     = {FZJ-2022-02606},
      pages        = {054521 -},
      year         = {2022},
      abstract     = {The development of high performance polymer electrolyte
                      fuel cells increasingly relies on modeling to optimally tune
                      cathode catalyst layers (CCL) to desired properties. This
                      includes models to rationalize the role of water as promoter
                      and asphyxiant to the oxygen reduction reaction. Existing
                      models are able to reproduce or predict, using assumed
                      parameters, the performance of the cell. However,
                      consideration of the wetting properties of the composite has
                      remained elusive. Experiments to characterize these
                      properties are difficult to perform. There is thus a gap in
                      theory for relating material choices with wetting
                      properties. This article elaborates on this gap and presents
                      a novel conceptual approach to close it. Fundamental
                      modeling approaches, molecular dynamics studies and
                      experimental works have shown that the interaction of
                      ionomer with the Pt/C surface exerts a major impact on
                      wetting behavior and water sorption properties of the porous
                      CCL composite. In our approach, the state of molecular
                      alignment of ionomer sidechains and backbones is linked to
                      the structural characteristics of the Pt/C catalyst. From
                      this rationalization, wetting properties of the CCL can be
                      deduced. An analysis of these correlations supports a
                      crucial hypothesis: lowering the platinum loading leaves the
                      CCL more prone to flooding.},
      cin          = {IEK-13 / JARA-ENERGY},
      ddc          = {660},
      cid          = {I:(DE-Juel1)IEK-13-20190226 / $I:(DE-82)080011_20140620$},
      pnm          = {1222 - Components and Cells (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1222},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000798965200001},
      doi          = {10.1149/1945-7111/ac6e8b},
      url          = {https://juser.fz-juelich.de/record/908440},
}