Multilayer perovskite air-electrode architectures for enhanced performance in intermediate-temperature solid oxide cells
Abstract
In this work, we show that perovskite-based air electrodes for intermediate-temperature solid oxide cells based on SrFeO3-delta and SrCoO3-delta in a multilayer architecture exhibit enhanced electrochemical performance and stability in comparison to single-phase or composite analogues. X-ray pure phases of SrFe0.9Mo0.1O3-delta, SrFe0.9Sb0.1O3-delta and SrCo0.95Mo0.05O3-delta were obtained by Pechini synthesis and deposited on Ce0.9Gd0.1O2-delta electrolyte membranes by slurry coating. Scanning electron microscopy revealed comparable thicknesses, good adherence to the electrolyte and homogeneous grain size of various configurations involving single-phase electrodes, two electrode layers of different composition and a composite SrFe0.9Mo0.1O3-delta- SrCo0.95Mo0.05O3-delta electrode. The configuration SrCo0.95Mo0.05O3-delta/SrFe0.9Mo0.1O3-delta/Ce0.9Gd0.1O2-delta shows a lower ASR of 0.15 S2 cm2 at 700 degrees C compared to the best-performing, single-phase electrode studied, SrCo0.95Mo0.05O3-delta (0.21 S2 cm2 at 700 degrees C). However, all other tested multi-phase configurations, including the composite, show polarisation-resistance values, with and without dc bias, similar to or slightly higher than that of the single-phase cobaltite. Thermal cycling indicates that SrFe0.9Mo0.1O3-delta in contact with the electrolyte notably benefits stability, most likely due to a better thermal and chemical match. The multilayer electrode SrCo0.95Mo0.05O3-delta/SrFe0.9Mo0.1O3-delta is promising for intermediate-temperature applications due to its superior electrochemical performance and stability in comparison to single-phase perovskite cobaltite.
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BibTeX
@article{zapataramirez2026multilayer,
title = {{Multilayer perovskite air-electrode architectures for enhanced performance in intermediate-temperature solid oxide cells}},
author = {Víctor Zapata-Ramírez and Glenn Mather and Domingo Pérez-Coll},
journal = {Journal of Power Sources},
year = {2026},
month = oct,
doi = {10.1016/j.jpowsour.2025.237980},
url = {https://hal.science/hal-05214365v2},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Multilayer perovskite air-electrode architectures for enhanced performance in intermediate-temperature solid oxide cells
AU - Víctor Zapata-Ramírez
AU - Glenn Mather
AU - Domingo Pérez-Coll
PY - 2026
DA - 2026/10/06
JO - Journal of Power Sources
DO - 10.1016/j.jpowsour.2025.237980
UR - https://hal.science/hal-05214365v2
AB - In this work, we show that perovskite-based air electrodes for intermediate-temperature solid oxide cells based on SrFeO3-delta and SrCoO3-delta in a multilayer architecture exhibit enhanced electrochemical performance and stability in comparison to single-phase or composite analogues. X-ray pure phases of SrFe0.9Mo0.1O3-delta, SrFe0.9Sb0.1O3-delta and SrCo0.95Mo0.05O3-delta were obtained by Pechini synthesis and deposited on Ce0.9Gd0.1O2-delta electrolyte membranes by slurry coating. Scanning electron microscopy revealed comparable thicknesses, good adherence to the electrolyte and homogeneous grain size of various configurations involving single-phase electrodes, two electrode layers of different composition and a composite SrFe0.9Mo0.1O3-delta- SrCo0.95Mo0.05O3-delta electrode. The configuration SrCo0.95Mo0.05O3-delta/SrFe0.9Mo0.1O3-delta/Ce0.9Gd0.1O2-delta shows a lower ASR of 0.15 S2 cm2 at 700 degrees C compared to the best-performing, single-phase electrode studied, SrCo0.95Mo0.05O3-delta (0.21 S2 cm2 at 700 degrees C). However, all other tested multi-phase configurations, including the composite, show polarisation-resistance values, with and without dc bias, similar to or slightly higher than that of the single-phase cobaltite. Thermal cycling indicates that SrFe0.9Mo0.1O3-delta in contact with the electrolyte notably benefits stability, most likely due to a better thermal and chemical match. The multilayer electrode SrCo0.95Mo0.05O3-delta/SrFe0.9Mo0.1O3-delta is promising for intermediate-temperature applications due to its superior electrochemical performance and stability in comparison to single-phase perovskite cobaltite.
SN - 0378-7753
SN - 1873-2755
ER -