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@INPROCEEDINGS{Thaler:864176,
      author       = {Thaler, Florian and Udomsilp, David and Beez, Alexander and
                      Bischof, Cornelia and Rojek-Wöckner, Veronika and
                      Schafbauer, Wolfgang and Theodoro, Giovanna and Nenning,
                      Andreas and Opitz, Alexander K. and Guillon, Olivier and
                      Bram, Martin},
      title        = {{E}nhanced {P}erformance and {D}urability of
                      {M}etal-{S}upported {F}uel {C}ells by {O}ptimized {C}ell
                      {P}rocessing},
      reportid     = {FZJ-2019-04041},
      year         = {2019},
      abstract     = {Objective: Metal-supported solid oxide fuel cells (MSCs)
                      are preferentially selected for mobile applications, e.g. as
                      auxiliary power unit (APU) in heavy-duty trucks or as range
                      extender for battery electric vehicles. The metallic support
                      material allows the cells to withstand harsh operating
                      conditions like fast thermal cycling, improves the
                      mechanical stability and redox tolerance and offers novel
                      possibilities for the internal reforming of hydrocarbons by
                      catalytic activation. On the other hand the concept offers a
                      potential for reducing the costs for cell production
                      compared to established cell concepts and simplifies the
                      sealing in a fuel cell stack by welding the substrate to the
                      interconnects. The aim of this work was to enhance the
                      Plansee MSC concept, in order to increase power density and
                      avoid severe degradation of the cells.Materials $\&$
                      Methods: To increase performance and long-term stability,
                      new electrode materials, optimized processing routes for
                      anode and cathode and tailored interfaces to the electrolyte
                      and metallic substrate were investigated. Performance
                      improvement was verified by electrochemical cell tests (I-V
                      and EIS). Long-term tests at constant operation conditions
                      enabled to study the durability of the cells. Degradation
                      phenomena were characterized by oxidation test with
                      subsequent microstructure investigations including
                      SEM/EDX.Results: Replacing LSCF by LSC as cathode material
                      in combination with optimization of particle size and
                      sintering regime was found to clearly increase the
                      electrochemical performance, especially at intermediate
                      operation temperature in the range of 600 - 700 °C. For the
                      fuel electrode, introduction of Ni/GDC instead of Ni/YSZ as
                      the functional layer of the anode, accompanied by a stepwise
                      optimization of the microstructure, resulted in another
                      significant increase of cell performance. This effect was
                      mainly based on enlarging the electrochemical active area.
                      Furthermore, lowering the ohmic resistance across the cell
                      by decreasing the electrolyte thickness was enabled by
                      improving the anode surface quality. On the basis of these
                      measures, cell performance could be enhanced from 0.12 A/cm2
                      to 1.34 A/cm2 at 0.9 V and 700 °C and long term stability
                      was confirmed for up to 1500 h of operation without severe
                      degradation. Moreover, MSC specific degradation phenomena
                      caused by oxidation of the anode and metallic substrate,
                      interdiffusion at the interfaces and Cr based poisoning of
                      the cathodes were identified.Conclusions: The presentation
                      summarizes the main results achieved in the “Christian
                      Doppler Laboratory for Interfaces in Metal-Supported
                      Electrochemical Energy Converters” since 2014 and
                      generally discusses the potential for further increase of
                      cell performance and long-term stability.},
      month         = {Jun},
      date          = {2019-06-16},
      organization  = {XVI ECerS Conference 2019, Turin,
                       Turin (Italy), 16 Jun 2019 - 20 Jun
                       2019},
      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/864176},
}