Synthesis and Characterization of CeO₂ for Use in Solid Oxide Fuel Cells

Thursday, 27 July 2017
Grand Ballroom East (The Diplomat Beach Resort)
D. A. Mendoza Muñiz, A. Grishin, M. Cassir (Chimie-ParisTech, PSL Research University), A. Ringuedé (PSL Research University-CNRS,Chimie ParisTech, IRCP), M. Hinojosa Rivera (Facultad de Ingeniería Mecánica y Eléctrica, UANL), and J. Á. Chavez Carvayar (Instituto de Investigaciones en Materiales, UNAM)
Due to the problems with greenhouse gas emission, fossil fuels consumption and air pollution, solid oxide fuel cells (SOFC) are a promising power generation technology, because of its good efficiency and low emissions. The key challenge is to achieve a competitive balance between cost, efficiency and durability. The aim of this work is to develop capabilities in order to acquire state-of-the-art knowledge on the chemical compatibility between stainless steel AISI 316 that was used as a substrate and CeO₂ as interconnector coating, as well as exploring the relationship between the electrolyte and the interconnector. The aim of this work was to synthesize and characterize materials by different techniques in order to have more information about of microstructure and electrochemical properties that may eventually lead to performance improvements.

In this work we report the synthesis and characterization of CeO₂ and Yttrium oxide (Y2O3) the materials were obtained by chemical bath deposition (CBD) and atomic layer deposition (ALD) techniques. The crystalline structures were analyzed by X-ray diffraction, the elemental composition of these materials was obtained by Energy-dispersive X-ray spectroscopy, and the microstructure was analyzed by scanning electron microscope (SEM) we also performed the study of the electrochemical properties by impedance measurements over a wide temperature range of 200-900°C. A mud-cracking pattern was observed in the samples obtained by chemical bath deposition whereas this pattern was not present in the ALD samples.