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@PHDTHESIS{Grimm:878232,
      author       = {Grimm, Fabian},
      title        = {{C}harakterisierung des {W}erkstoffverhaltens während des
                      {K}osinterns einer neuartigen, inert gestützten
                      {F}estoxidbrennstoffzelle},
      volume       = {498},
      school       = {RWTH Aachen},
      type         = {Dissertation},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmH Zentralbibliothek, Velag},
      reportid     = {FZJ-2020-02701},
      isbn         = {978-3-95806-482-9},
      series       = {Schriften des Forschungszentrums Jülich Reihe Energie $\&$
                      Umwelt / Energy $\&$ Environment},
      pages        = {ix, 168 S.},
      year         = {2020},
      note         = {Dissertation, RWTH Aachen, 2020},
      abstract     = {Despite the advantages of solid oxide fuel cells as an
                      potentially emission-free energy source, their
                      commercialization has been limited due to relatively high
                      costs that can be attributed to manufacturing and material
                      costs. Within the KerSOLife 100 project, which is publicly
                      funded by the Federal Ministry of Economic Affairs and
                      Energy (BMWi), a novel all-ceramic inert-supported solid
                      oxide fuel cell (ISC-BOSCH) was investigated. Due to the use
                      of cost-efficient materials and a simplified manufacturing
                      route, the total costs of the ISC-BOSCH can be drastically
                      reduced compared to conventional cells. The ISC-BOSCH
                      utilizes a porous manganese-silicate(forsterite), which is
                      applied at the air side, as support material. The simplified
                      manufacturing route is based on the sintering of all layers
                      within one single heat treatment step, so called cosintering
                      ,at 1200°C. In contrast, conventional solid oxide fuel
                      cells such as the anode-supported cell (ASC) require more
                      expensive NiO/8YSZ support materials. They are usually
                      manufactured with three up to five heat-treatment steps
                      which are precisely adapted to the individual layers and
                      thus cost-intensive. However, the cost reduction of the
                      ISC-BOSCH by using the relatively cheap support material for
                      sterite and the simplified manufacturing route leads to a
                      reduced cell performance. This reduced cell performance may
                      originate from the interactions of the support material
                      forsterite with the adjacent cathode layer during sintering
                      and the formation of cracks and/or leakages within the
                      electrolyte. The ISC-BOSCH uses LSM/8YSZ as cathode
                      material, which leads to the formation of a Zn-Mn-spinel
                      when co-sintered with forsterite, which negatively affects
                      the cell performance. Based on these finding, two different
                      tasks , were addressed in the present work: the adaption of
                      the sintering properties of the 8YSZ electrolyte material to
                      the co-sintering conditions, and the selection of a cathode
                      which displays a high catalytic activity that is not
                      negatively affected when co-sintered with forsterite.
                      Concerning the 8YSZ electrolyte, the required sintering
                      temperature of 1400°C could be reduced to 1200°C by a 5.1
                      $mol\%$ iron doping. To select a suitable cathode material
                      twelve different cathodes were investigated, ranging from
                      well-known perovskite materials such as LSC and LSF to
                      titanates such as STO and STF and rather new
                      Ruddlesden-Popper phases. In terms of interactions, after
                      the co-sintering, STO showed the least interactions with
                      forsterite. In contrast, LSF and LSC could be identified as
                      being highly reactive with forsterite. Despite the high
                      reaction tendency, after the co-sintering, LSF and the
                      Ruddlesden-Popperphases displayed the lowest polarization
                      resistances. Thus, this work demonstrates the importance of
                      selecting a cathode material not only based on its catalytic
                      properties, rather considering the entire manufacturing
                      procedure of the desired cell type and precisely adjusting
                      the layer properties to its surrounding conditions. Based on
                      the performed impedance analyses and cell tests, the most
                      promising cathode materials La$_{4}$Ni$_{3}$O$_{10}$,
                      La$_{3}$Ni$_{2}$O$_{7}$ and La$_{0,58}$Sr$_{0,4}$FeO$_{3}$
                      are highly recommended as performance-enhancing cathode
                      materials for the ISC-BOSCH.},
      cin          = {IEK-1},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)11},
      url          = {https://juser.fz-juelich.de/record/878232},
}