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@ARTICLE{Schfer:860156,
      author       = {Schäfer, Dominik and Fang, Qingping and Blum, Ludger and
                      Stolten, Detlef},
      title        = {{S}yngas {P}roduction {P}erformance and {D}egradation
                      {A}nalysis of a {S}olid {O}xide {E}lectrolyzer {S}tack},
      journal      = {Journal of power sources},
      volume       = {433},
      issn         = {0378-7753},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2019-00942},
      pages        = {126666 -},
      year         = {2019},
      abstract     = {A short stack of the Jülich F10 design with
                      anode-supported cells (ASCs; in fuel cell mode), based on
                      the Jülich design with a lanthanum strontium cobalt ferrite
                      (LSCF) air electrode, was employed for a medium-term
                      co-electrolysis operation in technically-relevant conditions
                      at 800 °C. The feed and product gases for an
                      identically-constructed stack under the same conditions were
                      monitored by a process-grade gas analysis system analyzing
                      all relevant gases, including water per direct measurement.
                      The product gas composition conforms to the expectation
                      based on electrolysis and the reverse water-gas shift (RWGS)
                      reaction for a wide range of conversion ratios. The
                      formation of methane as a by-product is discussed. The
                      degradation for stationary phases of the experiment amounted
                      to $∼2\%$ kh−1 (voltage degradation) and $4\%$ kh−1
                      (based on area specific resistance (ASR)), respectively.
                      Based on the evaluation of electrochemical impedance spectra
                      and post-mortem analyses, the degradation is induced by the
                      depletion of nickel near the electrolyte interface which
                      must be urgently resolved. A hypothesis for an
                      electrochemical mechanism is postulated that complements
                      existing theories. The mass transport contributes the most
                      to the total impedance and the porosity in our cathodes
                      should be optimized for electrolysis mode.},
      cin          = {IEK-3},
      ddc          = {620},
      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:000480670200002},
      doi          = {10.1016/j.jpowsour.2019.05.072},
      url          = {https://juser.fz-juelich.de/record/860156},
}