Synthesis and characterization of cobaltite nanotubes for solid-oxide fuel cell cathodes

FEDERICO NAPOLITANO; LAURA BAQUÉ; HORACIO TROIANI; MARA GRANADA; ADRIANA SERQUIS

Journal of Physics: Conference Series

Institute of Physics

Año: 2009 vol. 167 p. 120421 - 120425

1742-6596

La1-xSrxCo1-yFeyO3-d oxides are good candidates for solid oxide fuel cell (SOFC) cathodes because these materials present high ionic and electronic conductivity, and compatibility with Cerium Gadolinium Oxide (CGO) electrolytes allowing a lower operation temperature. In this work, we report the synthesis of La0.4Sr0.6Co0.8Fe0.2O3-d (LSCF) nanotubes prepared by a porous polycarbonate membrane approach, obtaining different microstructures depending on sintering conditions. The structure and morphology of the nanotubes and deposited films were characterized by X-ray diffraction, transmission and scanning microscopy. Finally, we obtained nanostructured films of vertically aligned LSCF tubes deposited over the whole surface of CGO pellets with diameter up to 2.5cm in a direct and single step process.