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%0 Thesis
%A Sarner, Stephan
%T Recyclingmöglichkeiten für die Keramikkomponenten einer Festoxidzelle; 1st ed
%V 660
%I RWTH Aachen University
%V Dissertation
%C Jülich
%M RWTH-2025-06031
%@ 978-3-95806-816-2
%B Schriften des Forschungszentrums Jülich. Reihe Energie & Umwelt / Energy & Environment
%P Online-Ressource (VIII, 122 Seiten) : Illustrationen, Diagramme
%D 2025
%Z Druckausgabe: 2025. - Onlineausgabe: 2025. - Auch veröffentlicht auf dem Publikationsserver der RWTH Aachen University
%Z Dissertation, RWTH Aachen University, 2025
%X The 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. Considering 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 resource-efficient 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 yttria-stabilized 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 
%F PUB:(DE-HGF)11 ; PUB:(DE-HGF)3
%9 Dissertation / PhD ThesisBook
%R 10.34734/FZJ-2025-02099
%U https://publications.rwth-aachen.de/record/1014345