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@INPROCEEDINGS{Beez:256200,
      author       = {Beez, Alexander},
      title        = {{T}hermodynamic considerations concerning {C}hromium
                      poisoning},
      reportid     = {FZJ-2015-06184},
      year         = {2015},
      abstract     = {One major degradation mechanism of SOFCs is the poisoning
                      of the perovskite cathodes because of gaseous chromium
                      species released from the metal interconnect and the tubing
                      of the stack. Despite the major effort that has already been
                      done in investigating the reaction mechanisms of chromium
                      with the cathode materials in SOFCs, the connection between
                      the cathode properties and the chromium deposition is still
                      not completely understood.Due to its high electronic and
                      ionic conductivity (La,Sr)(Co,Fe)O3 (LSCF) is one of the
                      most commonly used cathodes for SOFCs in the temperature
                      range of 700 – 800 °C. This material is favorable because
                      of its intrinsically high electronic and ionic conductivity.
                      One major drawback of LSCF is the segregation of SrO on the
                      cathode particle surface. The reaction of SrO and volatile
                      Cr-species in the gas phase lead to an insulating
                      SrCrO4-phase. This layer decreases the electronic
                      conductivity, hinders the gas transport through the porous
                      cathode and blocks catalytic active sites for the oxygen
                      reduction. The main challenge in describing the
                      Cr-degradation of SOFCs is the amount of influencing
                      parameters and how they are linked.As it’s one of the most
                      important parameters, two ways to measure the Cr partial
                      pressure and techniques to trap Cr from the gas phase will
                      be described. Together with thermodynamic calculations,
                      different types of model samples will be introduced as
                      well.},
      month         = {Sep},
      date          = {2015-09-29},
      organization  = {3rd INTERNATIONAL WORKSHOP ON
                       DEGRADATION ISSUES OF FUEL CELLS and
                       ELECTROLYSERS, Santorin (Greece), 29
                       Sep 2015 - 1 Oct 2015},
      subtyp        = {Invited},
      cin          = {IEK-1},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {135 - Fuel Cells (POF3-135) / SOFC - Solid Oxide Fuel Cell
                      (SOFC-20140602) / HITEC - Helmholtz Interdisciplinary
                      Doctoral Training in Energy and Climate Research (HITEC)
                      (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-135 / G:(DE-Juel1)SOFC-20140602 /
                      G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/256200},
}