Published in:Jülich : Forschungszentrum Jülich GmH Zentralbibliothek, Velag, Schriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment 498, ix, 168 S. (2020). = Dissertation, RWTH Aachen, 2020
Language:
German
ISBN:
978-3-95806-482-9
ISSN:
1866-1793
Origination:
Footnote:
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Description:
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 ...