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@ARTICLE{Blum:817737,
      author       = {Blum, Ludger},
      title        = {{A}n {A}nalysis of {C}ontact {P}roblems in {S}olid {O}xide
                      {F}uel {C}ell {S}tacks {A}rising from {D}ifferences in
                      {T}hermal {E}xpansion {C}oefficients},
      journal      = {Electrochimica acta},
      volume       = {223},
      issn         = {0013-4686},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2016-04380},
      pages        = {100 - 108},
      year         = {2017},
      abstract     = {The successful operation of solid oxide fuel cells (SOFC)
                      imposes high demands on the similarity of the thermal
                      expansion coefficients of the materials used. This is not
                      only due to thermo-mechanical factors but also because of
                      the risk of contact loss via the formation of a micro-gap
                      between the electrodes and adjacent contact layers caused by
                      temperature changes. The origin of the formation of such a
                      gap between the different layers in an SOFC stack is
                      investigated on the basis of various material combinations.
                      A comparison with successful and failed stack test results
                      reveals that there is a high probability of contact problems
                      if the calculated gap on the cathode side exceeds 200 nm.
                      This limit relates to the maximum possible elastic
                      deformation of the combination of the cathode and cathode
                      contact layer (CCL). Such contact problems can be avoided in
                      the current design by utilizing an appropriate combination
                      of the cathode, CCL and glass-ceramic material that can be
                      selected on the basis of the methodology outlined in the
                      current work. This optimization in materials selection will
                      help to establish a stack technology that allows high power
                      density with a minimized risk of failure of single layers.},
      cin          = {IEK-3},
      ddc          = {540},
      cid          = {I:(DE-Juel1)IEK-3-20101013},
      pnm          = {135 - Fuel Cells (POF3-135) / SOFC - Solid Oxide Fuel Cell
                      (SOFC-20140602)},
      pid          = {G:(DE-HGF)POF3-135 / G:(DE-Juel1)SOFC-20140602},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000392773100011},
      doi          = {10.1016/j.electacta.2016.12.016},
      url          = {https://juser.fz-juelich.de/record/817737},
}