Szpunar, I.; Strandbakke, R.; Sørby, MH.; Wachowski, SL.; Balaguer Ramirez, M.; Tarach, M.; Serra Alfaro, JM.... (2020). High-Temperature Structural and Electrical Properties of BaLnCo(2)O(6) Positrodes. Materials. 13(18):1-18. https://doi.org/10.3390/ma13184044
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/190357
Título:
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High-Temperature Structural and Electrical Properties of BaLnCo(2)O(6) Positrodes
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Autor:
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Szpunar, Iga
Strandbakke, Ragnar
Sørby, Magnus Helgerud
Wachowski, Sebastian Lech
Balaguer Ramirez, Maria
Tarach, Mateusz
Serra Alfaro, José Manuel
Witkowska, Agnieszka
Dzik, Ewa
Norby, Truls
Gazda, Maria
Mielewczyk-Gryn, Aleksandra
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Entidad UPV:
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Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química
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Fecha difusión:
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Resumen:
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[EN] The application of double perovskite cobaltites BaLnCo(2)O(6-delta) (Ln = lanthanide element) in electrochemical devices for energy conversion requires control of their properties at operating conditions. This work ...[+]
[EN] The application of double perovskite cobaltites BaLnCo(2)O(6-delta) (Ln = lanthanide element) in electrochemical devices for energy conversion requires control of their properties at operating conditions. This work presents a study of a series of BaLnCo(2)O(6-delta) (Ln = La, Pr, Nd) with a focus on the evolution of structural and electrical properties with temperature. Symmetry, oxygen non-stoichiometry, and cobalt valence state have been examined by means of Synchrotron Radiation Powder X-ray Diffraction (SR-PXD), thermogravimetry (TG), and X-ray Absorption Spectroscopy (XAS). The results indicate that all three compositions maintain mainly orthorhombic structure from RT to 1000 degrees C. Chemical expansion from Co reduction and formation of oxygen vacancies is observed and characterized above 350 degrees C. Following XAS experiments, the high spin of Co was ascertained in the whole range of temperatures for BLC, BPC, and BNC.
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Palabras clave:
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Positrode
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Cobaltites
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Synchrotron powder diffraction
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X-ray absorption spectroscopy
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Ceramics
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Thermal expansion
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Chemical expansion
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Derechos de uso:
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Reconocimiento (by)
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Fuente:
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Materials. (eissn:
1996-1944
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DOI:
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10.3390/ma13184044
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Editorial:
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MDPI AG
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Versión del editor:
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https://doi.org/10.3390/ma13184044
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Código del Proyecto:
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info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación (PEICTI) 2013-2016/PCIN-2017-125/ES/PRINCIPIO EN HIDRATACION DE OXIDOS CONDUCTORES MIXTOS/
info:eu-repo/grantAgreement/RCN//272797//GoPHy MiCO/
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-102161-B-I00/ES/CONVERSION DIRECTA DE CO2 EN PORTADORES DE ENERGIA QUIMICA UTILIZANDO REACTORES ELECTROCATALITICOS DE MEMBRANA/
info:eu-repo/grantAgreement/MCIU//IJCI-2017-34110/
info:eu-repo/grantAgreement/NCN//2016%2F22%2FZ%2FST5%2F00691/
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Agradecimientos:
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The research has been supported by the National Science Centre Poland (2016/22/Z/ST5/00691), the Spanish Ministry of Science and Innovation (PCIN-2017-125, RTI2018-102161 and IJCI-2017-34110), and the Research Council of ...[+]
The research has been supported by the National Science Centre Poland (2016/22/Z/ST5/00691), the Spanish Ministry of Science and Innovation (PCIN-2017-125, RTI2018-102161 and IJCI-2017-34110), and the Research Council of Norway (Grant no 272797 "GoPHy MiCO") through the M-ERA.NET Joint Call 2016. We acknowledge the CERIC-ERIC Consortium for the access to MCX beamline at Elettra Sinchrotrone Trieste (proposal no 20187079). We also acknowledge Solaris National Radiation Centre Poland for access to the XAS/PEEM beamline (proposal no 181MS001).
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Tipo:
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Artículo
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