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@INPROCEEDINGS{Rhrens:202764,
      author       = {Röhrens, Daniel and Szasz, Julian and Herzhof, Werner and
                      Weber, Andre and Ivers-Tiffee, Ellen and Menzler, Norbert H.
                      and Guillon, Olivier},
      title        = {{P}erformance variance of anode-supported {SOFC}-stacks:
                      systematic evaluation of material characteristics for
                      maximum output},
      reportid     = {FZJ-2015-04946},
      year         = {2015},
      abstract     = {Anode supported Solid Oxide Fuel Cells (ASC) manufactured
                      at Forschungszentrum Jülich have proven excellent
                      electrical efficiency and long term performance when
                      combined of a Nickel/8 $mol\%$ yttria stabilized zirconia
                      (Ni/8YSZ) substrate, a Ni/8YSZ anode, a dense 8YSZ
                      electrolyte membrane, a gadolinia doped ceria (GDC) barrier
                      layer and lanthanum strontium iron cobaltite (LSCF) cathode.
                      However, recently we observed a large scatter of the
                      electrical performance during stack operation with hydrogen
                      fuel. In this study, we systematically examined this
                      performance variance of planar anode-supported SOFC stacks.
                      In close cooperation with the Karlsruhe Institute of
                      Technology (KIT), anode supported cells were characterized
                      before and after stack operation by SEM-imaging and
                      electrochemical impedance spectroscopy. While a number of
                      factors, including the contacting of the LSCF cathode, the
                      properties of the interconnector protection layers and
                      operational parameters contribute to the performance
                      variation, we were able to identify the microstructure of
                      the GDC barrier layer as the major source for lowered and
                      fluctuating performance. The ability of this barrier layer
                      to inhibit the formation of low conductivity strontium
                      zirconates at the 8YSZ electrolytes surface was revealed to
                      be strongly and asymmetrically dependent on the sintering
                      parameters applied to the GDC layer.},
      month         = {Jun},
      date          = {2015-06-14},
      organization  = {11th international Conference on
                       Ceramic Materials and Components for
                       Energy and Environmental Applications,
                       Vancouver (Canada), 14 Jun 2015 - 19
                       Jun 2015},
      subtyp        = {After Call},
      cin          = {IEK-1},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      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)6},
      url          = {https://juser.fz-juelich.de/record/202764},
}