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@ARTICLE{Winterhalder:1035111,
      author       = {Winterhalder, Franziska Elisabeth and Farzin, Yousef A. and
                      Sohn, Yoo Jung and Lenser, Christian and Sebold, Doris and
                      Guillon, Olivier and Weber, André and Menzler, Norbert H.},
      title        = {{A} comprehensive study of phase evolution and
                      electrochemical performance of the
                      {S}r0.98{T}i0.5{F}e0.5{O}3-δ perovskite as fuel electrode
                      for steam electrolysis},
      journal      = {Journal of power sources},
      volume       = {630},
      issn         = {0378-7753},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2025-00207},
      pages        = {236084 -},
      year         = {2025},
      abstract     = {Perovskite-based electrodes have gained interest as
                      alternatives to Ni-cermet fuel electrodes in solid oxide
                      electrolysis cells (SOECs). This study investigates
                      strontium-iron-titanate (STF) as a potential all-ceramic
                      fuel electrode for SOECs. The chemical stability of pure STF
                      during SOEC operating conditions at open circuit voltage
                      (OCV) and the chemical reactivity between STF and
                      yttria-stabilized zirconia (YSZ) under manufacturing and
                      operation conditions are analyzed. The pure STF appears to
                      be quite stable during SOEC operation. However, the STF and
                      YSZ electrolyte powder mixture shows chemical interaction
                      during manufacturing and operation conditions, confirming
                      the need for a barrier layer between those two materials.
                      Furthermore, the electrochemical performance of
                      electrolyte-supported symmetrical and full cells is tested
                      at different temperatures (650–800 °C) and steam
                      concentrations (3–90 $\%$ H2O). A mid-term degradation
                      test in steam electrolysis operation for ca. 1700 h is
                      carried out under thermoneutral conditions (i = −0.43 A
                      cm−2) at 800 °C in 50 $\%$ H2O + 50 $\%$ H2. A low Rp
                      degradation rate (0.162 Ω cm2 kh−1) for the investigated
                      cell containing STF fuel electrode is obtained. However, the
                      increasing ohmic resistance during the operational period
                      caused an overpotential increase with a rate of 195 mV
                      kh−1. Finally, post-test analyses showed sufficient
                      chemical stability, representing STF as a potential
                      candidate as fuel electrode in SOECs.},
      cin          = {IMD-2},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IMD-2-20101013},
      pnm          = {1231 - Electrochemistry for Hydrogen (POF4-123) / SOFC -
                      Solid Oxide Fuel Cell (SOFC-20140602)},
      pid          = {G:(DE-HGF)POF4-1231 / G:(DE-Juel1)SOFC-20140602},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001393846200001},
      doi          = {10.1016/j.jpowsour.2024.236084},
      url          = {https://juser.fz-juelich.de/record/1035111},
}