Sánchez Ahijón, ElenaMarín Gamero, RafaelMolero-Sánchez, BeatrizÁvila Brande, DavidManjón-Sanz, AliciaFernández-Díaz, M. TeresaMorán Miguélez, EmilioSchmidt, RainerPrado Gonjal, Jesús de la Paz2024-01-292024-01-292020Sánchez-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.2050-748810.1039/c9ta12208ghttps://hdl.handle.net/20.500.14352/95885In 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.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/journal article2050-7496https://doi.org/10.1039/C9TA12208Gopen access546SOFCsNeutron diffractionImpedance spectroscopyQuímica inorgánica (Química)Física del estado sólido2210.28 Química del Estado Sólido2303 Química Inorgánica2210.28-1 Preparación y Caracterización de Materiales Inorgánicos