RT Journal Article
T1 High performance of SrCo1-xZrxO3-δ perovskite cathodes for IT-SOFCs
A1 Chivite Lacaba, Mónica
A1 Prado Gonjal, Jesús de la Paz
A1 Alonso, José Antonio
A1 Fernández Díaz, María Teresa
A1 Cascos Jiménez, Vanessa Amelia
AB Stabilization of a tetragonal perovskite structure in the SrCoO3-δ system at room temperature has been achieved through wet chemical techniques, and it has been successfully tested in Solid Oxide Fuel Cells (SOFCs). Chemical substitutions at the Co position were carried out by introducing different amounts of zirconium (SrCo1-xZrxO3􀀀 δ; x = 0.05, 0.08 and 0.11) to destabilize the columns of CoO6 octahedra sharing faces in the competitive 2H-hexagonal phase. The crystal structure was studied by X-ray diffraction (XRD) and neutron powder diffraction (NPD) at 25 ◦C and correlated with mechanical and electrical properties. Chemical compatibility studies between the samples and the La0.8Sr0.2Ga0.83Mg0.17O3-δ (LSGM) electrolyte revealed not interaction at high temperatures. Dilatometric analysis measurements showed a compatible thermal expansion with the LSGM electrolyte over the entire temperature range, demonstrating good mechanical compatibility. Furthermore, the relatively high conductivity  values (~83 S cm-1 at 850 ◦C) indicated their suitability as cathodes in SOFCs. Finally, test cells preparedwith an electrolyte (LSGM) supported configuration provided a maximum output power exceeding 600 mW/cm2 using pure H2 as fuel at 850 ◦C. Importantly, the performance of the cathode materials did not degrade after extended operation at this temperature.
PB Elsevier
YR 2024
FD 2024-04-01
LK https://hdl.handle.net/20.500.14352/109920
UL https://hdl.handle.net/20.500.14352/109920
LA eng
NO ónica Chivite-Lacaba, Jesús Prado-Gonjal, José Antonio Alonso, María Teresa Fernández-Díaz, Vanessa Cascos, High performance of SrCo1-xZrxO3-δ perovskite cathodes for IT-SOFCs, Ceramics International, Volume 50, Issue 15, 2024, Pages 26929-26937, ISSN 0272-8842, https://doi.org/10.1016/j.ceramint.2024.04.424.
NO Ministerio de Ciencia e Innovación (España)
NO Universidad Complutense de Madrid
NO Comunidad de Madrid
DS Docta Complutense
RD 8 abr 2025