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@INPROCEEDINGS{Zeng:1018119,
      author       = {Zeng, Yuan and Schäfer, Laura-Alena and Guillon, Olivier
                      and Ivanova, Mariya and Menzler, Norbert H.},
      title        = {{P}reparation of 1 μm dense {B}a{Z}r0.8{Y}0.2{O}3-δ
                      electrolyte via water-based wet powder spraying for proton
                      conducting cells},
      reportid     = {FZJ-2023-04563},
      year         = {2023},
      abstract     = {Proton conducting ceramic materials are highly promising
                      for intermediate-temperature electrochemical devices such as
                      fuel cells and electrolysis cells due to their protonic
                      conductivity in the temperature range of 400-600 °C[1]. The
                      inherent refractory properties of the state-of-the art
                      proton conductor Y-substituted Ba(Zr, Ce)O3 (BZCY) poses a
                      major challenge in its sintering process, especially when
                      the goal is to prepare physically thin (< 5 μm) and
                      gas-tight electrolyte layers. Typically this issue is
                      approached by adding sintering aids to the BZCY, such as
                      NiO, to facilitate the sintering at milder temperatures.
                      However, adding NiO or other sinter-aids usually compromises
                      the hydration and electrical properties of the electrolyte.
                      Additionally, electrolyte materials containing Ce exhibit
                      relatively high proton conductivity but suffer from chemical
                      instability[2]. Here, we developed thin Ce- and sintering
                      aids-free BaZr0.8Y0.2O3-δ electrolyte layer using the wet
                      powder spraying deposition. For this purpose, nanopowder was
                      initially prepared by Pechini synthesis and consecutive
                      milling to D50 ~ 100 nm and further processed to
                      environmentally friendly aqueous dispersion. This dispersion
                      was then coated onto pre-fired BZCY/NiO substrate by wet
                      powder spraying. By adjusting the spray parameters, the
                      thickness of the final sintered electrolyte could be
                      controlled, with a minimum thickness as low as 1 μm. Dense
                      electrolyte layers were achieved by tuning the sintering
                      program. The pre-history of the substrate layer has been
                      found to play a crucial role in the sintering and
                      densification of the electrolyte. The microstructure, helium
                      leakage rate and impedance of the half-cell were also
                      characterized.},
      month         = {Sep},
      date          = {2023-09-16},
      organization  = {The 21st International Conference on
                       Solid-State Protonic Conductors,
                       Fukuoka (Japan), 16 Sep 2023 - 22 Sep
                       2023},
      subtyp        = {After Call},
      cin          = {IEK-1},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      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)24},
      url          = {https://juser.fz-juelich.de/record/1018119},
}