Combustion synthesis of Sm0.5Sr0.5CoO3−x and La0.6Sr0.4CoO3−x nanopowders for solid oxide fuel cell cathodes |
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| Affiliation: | 1. National Aeronautics and Space Administration, Glenn Research Center, Cleveland, OH 44135, USA;2. QSS Group Inc., NASA Glenn Research Center Group, Cleveland, OH 44135, USA;1. Department of Physics, University of Engineering and Technology, Lahore, 54890, Pakistan;2. Department of Chemical Engineering, College of Engineering, King Saud University, P.O BOX 800, Riyadh, 11421, Saudi Arabia;3. Clean Energy Research Lab (CERL), Department of Physics, COMSATS University Islamabad, Lahore Campus, Lahore, 54000, Pakistan;4. Department of Physics, University of Sahiwal, Sahiwal, Pakistan;5. Department of Physics, Chemistry and Biology, Semiconductor Materials, Linköping University, Sweden;1. Universidad Autónoma de Nuevo León, Facultad de Ingeniería Mecánica y Eléctrica (FIME), Av. Universidad s/n, Ciudad Universitaria, San Nicolás de los Garza, Nuevo León 66451, Mexico;2. Universidad Autónoma de Nuevo León, FIME-CIIDIT, Km 10 de la nueva carretera al Aeropuerto Internacional de Monterrey, PIIT Monterrey, CP 66600 Apodaca, Nuevo León, Mexico;3. Universidad Autónoma de Nuevo León, FIME-CIIIA, Aeropuerto Internacional del Norte, Carretera a Nuevo Laredo k.m. 1006, Apodaca, Nuevo León, Mexico;4. CIEMAT, Av. Complutense 40, 28040 Madrid, Spain;1. Hubei Collaborative Innovation Center for Advanced Materials, Faculty of Physics and Electronic Science, Hubei University, Wuhan, Hubei 430062, PR China;2. Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistan;3. Faculty of Materials Science and Chemistry, China University of Geosciences (Wuhan), Wuhan 430074, China;4. Department of Energy Technology, Royal Institute of Technology, Stockholm SE-10044, Sweden;5. School of Aeronautical & Automotive Engineering, Loughborough University, Loughborough LE113TU, United Kingdom;1. “IlieMurgulescu” Institute of Physical Chemistry, Romanian Academy, 202 SplaiulIndependentei, 060021 Bucharest, Romania;2. Romania National Institute for Research and Development in Microtechnologies(IMT), 023573 Bucharest, Romania;3. Faculty of Chemistry and Chemical Technology State University of Moldova 60 Mateevici, Chisinau MD 2009 Republic of Moldova |
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| Abstract: | Nanopowders of Sm0.5Sr0.5CoO3−x (SSC) and La0.6Sr0.4CoO3−x (LSC) compositions, which are being investigated as cathode materials for intermediate temperature solid oxide fuel cells (SOFC), were synthesized by a solution–combustion method using metal nitrates and glycine as fuel. Development of crystalline phases in the as-synthesized powders after heat treatments at various temperatures was monitored by X-ray diffraction (XRD). Perovskite phase in LSC formed more readily than in SSC. Single-phase perovskites were obtained after heat treatment of the combustion synthesized LSC and SSC powders at 1000 and 1200 °C, respectively. The as-synthesized powders had an average particle size of ∼12 nm as determined from X-ray line broadening analysis using the Scherrer equation. Average grain size of the powders increased with increase in calcination temperature. Morphological analysis of the powders calcined at various temperatures was done by scanning electron microscopy (SEM). |
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