Metal Oxides: Crystallographic characterizations for high temperatureelectrochemistry applications

SERQUIS, ADRIANA C.; NAPOLITANO, FEDERICO; SOLDATI, ANALIA L.; FERNANDEZ ZUVICH, AFRA; BAQUÉ, LAURA; ARCE, MAURICIO; MOGNI, LILIANA V.; TROIANI, HORACIO; SALETA, MARTÍN

Hyderabad

Congreso; IUCr 2017 - 24° Congress and General Assembly of the International Union of Crystallography; 2019

International Union of Crystallography

The strong relationship between the crystallographic structure and defects with the electronic and transport properties of a certain material is a key figure in most of the research conducted in materials science. The properties of an oxide in particular(transport, electrochemical, thermal, etc.) can be affected by several factors including the synthesis method and environmental conditions such as pressure, temperature, atmosphere, electrical current and field, magnetic field, etc. Therefore, it is important to go beyond the limited information obtained through the traditional ex-situ characterization techniques toward the more exhaustive ones provided by the in-situ or in-operando experiments, where it is possible the study of a device under nonambient working conditions.In this talk I will present some of the latest results obtained in our group involving several ceramic materials that are intended forsustainable clean energy generation devices like solid oxide fuel cells (SOFC). The focus will be placed on the correlation between the microstructural aspects (determined by the processing parameters) and their physical properties that determine thematerials efficiency. The structural stability and chemical compatibility between the electrode and electrolyte materials studied were evaluated through the combination of several characterization techniques, such as electron microscopies (SEM, TEM), Xraydiffraction (XRD), chemical analysis by EDS and synchrotron radiation methods (XANES y EXAFS), including some in-situ and in-operando techniques.