Enhanced LSCF oxygen deficiency through hydrothermal synthesis |
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Authors: | Valdir Pereira Junior Priscila Lemes Rachadel Mara Novy Quadri Dachamir Hotza Sergio Yesid Gómez González |
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Affiliation: | Department of Chemical Engineering (EQA), Federal University of Santa Catarina (UFSC), 88040-900 Florianópolis, Brazil |
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Abstract: | High-performance perovskites are promising materials for diverse renewable energy technologies. Besides design characteristics, the devices performance depends on the material synthesis, since the processes occurring during synthesis may produce different structures and properties. In this work, the perovskite La0.1Sr0.9Co0.9Fe0.1O3-δ (LSCF1991) was synthesized by different methods, and the phase composition and oxygen deficiency were assessed and discussed. We show that it is possible to increase oxygen deficiency by promoting oxygen release during crystallization within hydrothermal synthesis, producing a remarkable improvement of ?δ ~0.2 in comparison with the citrate method. The single phase LSCF1991 powder was characterized, shaped by different routes and sintered to demonstrate the stability and suitability to manufacture electrochemical devices. |
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Keywords: | LSCF Oxygen Non-stoichiometry Crystallization Hydrothermal synthesis Colloidal processing |
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