001041035 001__ 1041035
001041035 005__ 20250414202156.0
001041035 0247_ $$2datacite_doi$$a10.34734/FZJ-2025-02099
001041035 0247_ $$2URN$$aurn:nbn:de:0001-2504140934243.795472099539
001041035 020__ $$a978-3-95806-816-2
001041035 037__ $$aFZJ-2025-02099
001041035 1001_ $$0P:(DE-Juel1)188482$$aSarner, Stephan$$b0$$eCorresponding author$$ufzj
001041035 245__ $$aRecyclingmöglichkeiten für die Keramikkomponenten einer Festoxidzelle$$f- 2025
001041035 260__ $$aJülich$$bForschungszentrum Jülich GmbH Zentralbibliothek, Verlag$$c2025
001041035 300__ $$aVIII, 122
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001041035 3367_ $$0PUB:(DE-HGF)11$$2PUB:(DE-HGF)$$aDissertation / PhD Thesis$$bphd$$mphd$$s1744204775_21583
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001041035 4900_ $$aSchriften des Forschungszentrums Jülich Reihe Energie & Umwelt / Energy & Environment$$v660
001041035 502__ $$aDissertation, RWTH Aachen University, 2025$$bDissertation$$cRWTH Aachen University$$d2025
001041035 520__ $$aThe solid oxide cell is a high-efficient technology for the production and conversion of hydrogen into electricity. This technology is based on high-performance ceramics that contain a variety of strategically valuable and critical raw materials. In light of the growing global interest in low-CO2 hydrogen, a significant market ramp-up of this technology is expected in the coming decade. To ensure sustainable and resourceefficient use, the development of economically viable recycling concepts for production scrap and returned materials is crucial, even at the early stages of commercialization. This thesis presents a recycling concept that primarily focuses on preserving the main fraction of the cell material in a closed-loop system. The bulk material consists of yttriastabilized zirconia and nickel, while smaller amounts of gadolinium-doped ceria and lanthanum-strontium-cobalt-ferrite are present in the cell composite. Accordingly, the recycling concept applies to fuel electrode-supported solid oxide cells and is demonstrated using cells manufactured at the Forschungszentrum Jülich. A key element of the process lies in the complete separation of the air-side perovskite components (here: lanthanum-strontium-cobalt-ferrite) from the rest of the cell composite, which was achieved through a wet chemical process using hydrochloric acid. The separation process was optimized to ensure that the perovskite compound is fully decomposed, while the main fraction of the cell remains as a stable solid phase. This undissolved solid residue is mechanically crushed and was partially reincorporated into the production of new cell material in the form of a substrate. Despite minor differences in the lateral shrinkage behavior during the sintering process, the functionality of the recycled substrate was maintained compared to a new, non-recycled standard. The closed-loop process achieved a material yield of approximately 97 %. Furthermore, the recovery of strategically valuable metals from the perovskite components, particularly lanthanum, was investigated in an open-loop approach. By direct oxalate precipitation, a large portion of the contained lanthanum was recovered with a chemical purity of over 98 %. The results demonstrate the technical feasibility of integrating ceramic solid oxide waste into the manufacturing process and retaining the majority of the cell components (85–90 mass percentage) directly in a closed loop. The advantages and limitations of the process were considered in comparison with other studies in this emerging research field and discussed throughout this work.
001041035 536__ $$0G:(DE-HGF)POF4-1231$$a1231 - Electrochemistry for Hydrogen (POF4-123)$$cPOF4-123$$fPOF IV$$x0
001041035 536__ $$0G:(DE-Juel1)SOFC-20140602$$aSOFC - Solid Oxide Fuel Cell (SOFC-20140602)$$cSOFC-20140602$$fSOFC$$x1
001041035 8564_ $$uhttps://juser.fz-juelich.de/record/1041035/files/Energie_Umwelt_660.pdf$$yOpenAccess
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001041035 9141_ $$y2025
001041035 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)188482$$aForschungszentrum Jülich$$b0$$kFZJ
001041035 9131_ $$0G:(DE-HGF)POF4-123$$1G:(DE-HGF)POF4-120$$2G:(DE-HGF)POF4-100$$3G:(DE-HGF)POF4$$4G:(DE-HGF)POF$$9G:(DE-HGF)POF4-1231$$aDE-HGF$$bForschungsbereich Energie$$lMaterialien und Technologien für die Energiewende (MTET)$$vChemische Energieträger$$x0
001041035 920__ $$lyes
001041035 9201_ $$0I:(DE-Juel1)IMD-2-20101013$$kIMD-2$$lWerkstoffsynthese und Herstellungsverfahren$$x0
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