Electrochemical behavior of nanostructured La0.8Sr0.2MnO3 as cathodes for solid oxide fuel cells
Sacanell, Joaquín (Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina))
Hernández Sánchez, Joaquín (Comisión Nacional de Energía Atómica)
Rubio López, Adrián Ezequiel (Comisión Nacional de Energía Atómica)
Martinelli, Hernán (Comisión Nacional de Energía Atómica)
Siepe, Jimena (Comisión Nacional de Energía Atómica)
Leyva, Ana Gabriela (Universidad Nacional de General San Martín)
Ferrari, Valeria Paola (Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina))
Pruneda, Miguel (Institut Català de Nanociència i Nanotecnologia)
Juan, Dilson (Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina))
Lamas, Diego Germán (Universidad Nacional de General San Martín)

Date:	2017
Abstract:	LaSrMnO (LSM) is one of the most commonly used cathodes in Solid Oxide Fuel Cells (SOFC). In spite of the fact that nanostructured cathodes are expected to display improved performance, the high operating temperature (∼ 1000°C) of LSM-based SOFCs hinders their stability. In the present work, we have developed nanostructured cathodes prepared from LSM nanotubes of enhanced performance, allowing its use at lower temperatures (∼ 800°C). We observed that our cathodes have qualitative improvements compared with microstructured materials: firstly, the diffusion in the gas phase is optimized to a negligible level and secondly, evidence of ionic conduction is found, which is extremely rare in LSM cathodes. We propose that this important change in the electrochemical properties is due to the nanostructuration of the cathode and deserves further attention, including the exploration of other materials.
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Electrochemical behaviors ; Gasphase ; High operating temperature ; Lower temperatures ; Microstructured materials ; Nano structuration ; Nano-structured
Published in:	ECS transactions, Vol. 78, Núm. 1 (July 2017) , p. 667-675, ISSN 1938-6737

DOI: 10.1149/07801.0667ecst

Preprint 11 p, 359.4 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles