RT Journal Article
T1 From theory to experiment: BaFe0.125Co0.125Zr0.75O3−δ, a highly promising cathode for intermediate temperature SOFCs
A1 Sánchez Ahijón, Elena
A1 Marín Gamero, Rafael
A1 Molero-Sánchez, Beatriz
A1 Ávila Brande, David
A1 Manjón-Sanz, Alicia
A1 Fernández-Díaz, M. Teresa
A1 Morán Miguélez, Emilio
A1 Schmidt, Rainer
A1 Prado Gonjal, Jesús de la Paz
AB In a recent theoretical study [Jacobs et al., Adv. Energy Mater., 2018, 8, 1702708], BaFe0.125Co0.125Zr0.75O3−δ was predicted to be a stable phase with outstanding performance as an auspicious cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). It is shown here that the theoretical predictions are valid. The material can be synthesized by the citrate method as a single cubic Pm[3 with combining macron]m phase with a significant amount of oxygen vacancies, randomly distributed in the anionic sublattice facilitating oxygen vacancy conduction. A thermal expansion coefficient of 8.1 × 10−6 K−1 suggests acceptable compatibility with common electrolytes. Electrochemical impedance spectroscopy of symmetrical cells gives an area-specific resistance of 0.33 Ω cm2 at 700 °C and 0.13 Ω cm2 at 800 °C. These values are reduced to 0.13 Ω cm2 at 700 °C and 0.05 Ω cm2 at 800 °C when the material is mixed with 30 wt% Ce0.9Gd0.1O2−δ.
PB Royal Society of Chemistry
SN 2050-7488
YR 2020
FD 2020
LK https://hdl.handle.net/20.500.14352/95885
UL https://hdl.handle.net/20.500.14352/95885
LA eng
NO Sánchez-Ahijón, Elena, et al. «From Theory to Experiment: BaFe 0.125 Co 0.125 Zr 0.75 O 3−δ , a Highly Promising Cathode for Intermediate Temperature SOFCs». Journal of Materials Chemistry A, vol. 8, n.o 6, 2020, pp. 3413-20. https://doi.org/10.1039/C9TA12208G.
NO Ministerio de Economía y ́Competitividad (España)
NO Comunidad de Madrid
DS Docta Complutense
RD 6 abr 2025