Structural and oxygen vacancies study of the La4BaCu5-xNixO13+¿ perovskite at operation temperature for SOFC applications
Among the multiple possibilities of doping the parent structure La4BaCu5O13+¿, we chose to introduce the Ni cation in the B site, in order to probe the properties of La4BaCu5-xNixO13+¿ family as cathode in SOFC. We have synthesized La4BaCu4NiO13+¿ (x=1) and La4BaCu3Ni2O13+¿ (x=2) compounds using the sol-gel method. A complete study of the crystalline structure would complete the scenario, because X-ray diffraction does not allow differentiating the two cations present in the B site. Anderson et al. reported the study of the crystal structure of x=1 sample, but x=2 sample has not been studied by Neutron diffraction in order to obtain a reliable model of the material structure. More importantly, there are no detailed reports in the literature for the behavior of oxygen vacancies when changing the oxygen partial pressure, correlating structural and functional properties. Detailed neutron diffraction experiments as a function of temperature and oxygen partial pressure will help us to understand the conductivity mechanisms of these compounds. These aspects are very important for a complete analysis of these novel materials for SOFC cathode applications.
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LAGUNA BERCERO Miguel; AURELIO Gabriela; J Campo; J. M. De Paoli; MORALES ZAPATA MIGUEL; ORERA Alodia; PUENTE ORENCH Ines; SAVVIN Stanislav and TELLEZ BERNAL Jhoan Francisco. (2023). Structural and oxygen vacancies study of the La4BaCu5-xNixO13+¿ perovskite at operation temperature for SOFC applications. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-23-799
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