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Efecto sobre la reacción de oxígeno de la forma y la microestructura del contacto electrodo-electrolito de electrodos a difusión interna en Celdas de Combustible de Óxido Sólido (SOFC)

[ES] En este trabajo, se estudia la influencia de la forma del electrodo elemental y la microestructura del contacto electrodo-electrolito, del electrodo de gas a difusión interna en celdas de combustible de óxido sólido (SOFC). Se determina la influencia de la microestructura del contacto electrodo electrolito sobre la resistencia efectiva del electrolito, la influencia de la forma del contacto de un grano elemental de un electrodo poroso suponiendo que sea aproximadamente una semiesfera sobre la reacción del electrodo y finalmente la influencia de la microestructura del contacto electrodo - electrolito en la respuesta a un control difusivo puro del electrodo. De los resultados obtenidos se pueden extraer conclusiones sobre la influencia de la microestructura del contacto y forma del electrodo en la reacción de oxígeno en este tipo de electrodos de gas. [EN] In this work we have studied the elemental electrode shape and electrode - electrolyte contact microstructure influence of Internal diffusion (ID) gas electrode in solid oxide fuel cells (SOFC). First the influence over the electrolyte effective resistance is studied. Then the influence of the shape of the elemental contact grain of ID electrode is also studied. Finally the influence of the electrode - electrolyte contact microstructure in the electrode response for a pure diffuse control is modelled. From the obtained results, conclusions on the contact microstructure and electrode shape influence over the oxygen reaction of this kind of gas electrodes are commented. R. Jiménez quiere agradecer al Consejo Superior de Investigaciones Científicas la beca postdoctoral que hizo posible la realización de este trabajo. Peer reviewed
solid Oxide, Óxido sólido, microstructure, Fuel cell, Clay industries. Ceramics. Glass, Óxido Sólido, Microestructura, Solid oxide, TP785-869, electrodos de gas, Gas electrode, Celdas de combustible, Microstructure, microestructura, Electrodos de gas
solid Oxide, Óxido sólido, microstructure, Fuel cell, Clay industries. Ceramics. Glass, Óxido Sólido, Microestructura, Solid oxide, TP785-869, electrodos de gas, Gas electrode, Celdas de combustible, Microstructure, microestructura, Electrodos de gas
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