Conference of Monica Burriel - Post-doctoral fellowship

Conference of Monica Burriel - Post-doctoral fellowship

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Conference of Monica Burriel - Post-doctoral fellowship from
Imperial College, London
Publié le November 29, 2012
Date de l'évènement : December 13, 2012
14:00 pm
New oxide nano-structured materials with tailored properties for IT-SOFCs
With the aim of developing SOFC cathode materials offering low polarization losses and
long-term stability at intermediate operating temperatures, my research has focused on
understanding the properties of alternative types of MIEC (mixed ionic and electronic
conducting) ceramic materials. In my talk I will present some examples of promising novel
oxides, mainly from the Ruddlesden-Popper Ln2NiO4+ (Ln = La, Nd, Pr) family and the
double perovskite RBaCo2O5+ (R = rare earth) family, focusing on the effect of the structure,
orientation and composition of the compounds on the derived properties. I will also introduce
the new surface science instrumentation available at Imperial College: a combination of Low
Energy Ion Scattering (LEIS) and Time-of-Flight Secondary Ion Mass Spectrometry
(ToF-SIMS), which allows the study of the surface chemistry with unparalleled precision and
sensitivity and provides a comprehensive 3D image of the composition, including the
interfaces and grain boundaries. Finally, I will show some examples and recent results using
this unique combination of techniques for the investigation of the oxygen incorporation and
transport in these materials, as well as the factors limiting the oxygen exchange process,
including cation segregation and secondary phase formation occurring at high temperatures.
Lieu :
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