info:eu-repo/semantics/article
Nanostructured LnBaCo2O6-δ (Ln = Sm, Gd) with layered structure for intermediate temperature solid oxide fuel cell cathodes
Fecha
2017-04Registro en:
Mejía Gómez, Augusto Enrique; Lamas, Diego Germán; Leyva de Guglielmino, Ana Gabriela; Sacanell, Joaquin Gonzalo; Nanostructured LnBaCo2O6-δ (Ln = Sm, Gd) with layered structure for intermediate temperature solid oxide fuel cell cathodes; American Institute of Physics; AIP Advances; 7; 4; 4-2017; 1-7; 045214
2158-3226
CONICET Digital
CONICET
Autor
Mejía Gómez, Augusto Enrique
Lamas, Diego Germán
Leyva de Guglielmino, Ana Gabriela
Sacanell, Joaquin Gonzalo
Resumen
In this work, we present the combination of two characteristics that are beneficial for solid oxide fuel cell (SOFC) cathodic performance in one material. We developed and evaluated for the first time nanostructured layered perovskites of formulae LnBaCo2O6-d with Ln = Sm and Gd (SBCO and GBCO, respectively) as SOFC cathodes, finding promising electrochemical properties in the intermediate temperature range. We obtained those nanostructures by using porous templates to confine the chemical reagents in regions of 200-800 nm. The performance of nanostructured SBCO and GBCO cathodes was analyzed by electrochemical impedance spectroscopy technique under different operating conditions using Gd2O3-doped CeO2 as electrolyte. We found that SBCO cathodes displayed lower area-specific resistance than GBCO ones, because bulk diffusion of oxide ions is enhanced in the former. We also found that cathodes synthesized using smaller template pores exhibited better performance.