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@PHDTHESIS{Hoppe:893047,
      author       = {Hoppe, Eugen},
      title        = {{K}ompressionseigenschaften der {G}asdiffusionslage einer
                      {H}ochtemperatur-{P}olymerelektrolyt-{B}rennstoffzelle},
      volume       = {537},
      school       = {RWTH Aachen University},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2021-02525},
      isbn         = {978-3-95806-549-9},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {viii, 153},
      year         = {2021},
      note         = {Dissertation, RWTH Aachen University, 2021},
      abstract     = {The high-temperature polymer electrolyte fuel cell
                      (HT-PEFC) has a wide range of applicationsin stationary
                      applications such as combined heat and power generation or
                      as uninterruptiblepower supply, as well as on-board power
                      supply in mobile applications.The aim of the present work is
                      to investigate the compression behavior of the gas diffusion
                      layer(GDL) used in an HT-PEFC in combination with the
                      membrane electrode assembly (MEA). Tocharacterize the
                      compression behavior, the parameters porosity, permeability
                      and the intrusionbehavior of the GDL into the flow channel
                      are used. Using a computer tomograph, 3D modelsof the
                      compressed GDL are generated in the MEA assembly and the
                      relevant parameters aredetermined in post-processing. Based
                      on the obtained properties of the compressed GDL,
                      HTPEFCsingle cell tests are carried out with two commercial
                      MEAs to show the influence of thechange in properties of the
                      GDL on cell performance.For the ex-situ tests, three
                      different GDL types, namely H2315 C2 from Freudenberg FCCT
                      $SE\&$ Co. KG (non-woven), TGP-H-060 from Toray Industries
                      Inc. (paper) and AvCarb 1071HCB(woven) from AvCarb Material
                      Solutions were used. In a first compression cell, the GDLs
                      in theMEA assembly are compressed by a one-sided channel-rib
                      structure with channel widths of0;8 and 1;0 mm, and the
                      porosity, as well as the penetration behavior and
                      permeability are determined.The non-woven and paper GDLs
                      show an equivalent behavior both on the changingcompression
                      and on the variation of the channel width. Regardless of the
                      channel width, theporosity of the three GDLs decreases
                      linearly. Against the background of manufacturing
                      andassembly tolerances, the influence of the flowfield plate
                      misalignment on the intrusion behaviorin five channel pairs
                      was investigated in a second compression cell with constant
                      compression.As the misalignment increases, the point of
                      maximum intrusion depth also shifts and thecatalyst coated
                      membrane (CCM) moves towards the channels.The single cell
                      experiments with varying compression show that for a maximum
                      power density,compressions of up to $15\%$ can be selected
                      for the MEA with non-woven GDL and up $to20\%$ for the MEA
                      with woven GDL. A misalignment of the flowfield plates by
                      almost $50\%(1$ mm) has no significant influence on the
                      performance of an HT-PEFC single cell for bothMEAs
                      investigated.},
      cin          = {IEK-14},
      cid          = {I:(DE-Juel1)IEK-14-20191129},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123)},
      pid          = {G:(DE-HGF)POF4-1231},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:0001-2021072207},
      url          = {https://juser.fz-juelich.de/record/893047},
}