Symmetry breaking and electrical conductivity of La0.7Sr0.3Cr0.4Mn0.6O3−δ perovskite as SOFC anode material

Composite titanate cathode enhanced with in situ grown nickel nanocatalyst for direct steam electrolysis

“…10 Compared with Ni/YSZ, perovskite-type La x Sr 1Àx Cr y Mn 1Ày O 3Àd (LSCM) has been proved to be an active and redox stable material which can be used as both a cathode and anode in high temperature solid oxide fuel cells (SOFCs). [11][12][13] Irvine and Yang first reported direct steam electrolysis based on the ceramic cathode LSCM without the flow of reducing gas over the composite electrode and it was found that the composite cathode was stable without any performance degradation in the electrolysis. 14 However, insufficient catalytic activity of LSCM cathode limits the electrolysis performance as reported in our previous work.…”

Evaluación del cerámico con estructura tipo perovskita LaFe0,2Co0,8O3 / Evaluation of the perovskite LaFe0.2Co0.8O3

“…La gráfica tipo Arrhenius de la Figura 10 presenta una tendencia lineal, cuya pendiente permite determinar un valor de energía de activación de 1,08 eV , lo que indica que la conductividad se genera en mayor medida mediante mecanismos electrónicos. El comportamiento mostrado por la Figura 9 y la Figura 10, sumado a los datos obtenidos a partir de la Figura 3, corroboran la naturaleza eléctrica del material, que se explica gracias a la activación térmica que propicia una mayor movilidad de los portadores de carga a través de los enlaces B-O-B, ayudando a confirmar la estabilidad química y estructural a altas temperaturas [31,39]. Estos fenómenos son típicos de óxidos semiconductores tipo-p, dentro de los que podemos nombrar a los sistemas LaMn 1−x Cr x O 3±δ , LaFe 1−x Co x O 3±δ , y LaFe 1−x Ti x O 3±δ , que han sido ampliamente estudiados por sus interesantes propiedades eléctricas, derivadas del uso de rutas de síntesis de química húmeda [40][41][42][43].…”

Performance characterization and modelling of syngas-fed SOFCs (solid oxide fuel cells) varying fuel composition

“…It is strong, it causes low electrolyte losses, it does not meet with brittling. Literature analysis revealed that many R&D activities were carried out on novel and more performing materials, such as NiGDC and perovskites [46]. However, despite they allow reaching enhanced performances and they are particularly recommended for carbon degradation suppression (an issue that is crucial when carbon-containing fuel are used), their behaviour has to be studied more deeply and verified experimentally [47].…”