In Situ Construction of a High-Entropy Perovskite Based Tri-Phase Composite Electrode toward Efficient Reversible Solid Oxide Cells

In Situ Construction of a High-Entropy Perovskite Based Tri-Phase Composite Electrode toward Efficient Reversible Solid Oxide Cells

© 2025 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - (2025) vom: 26. Aug., Seite e12257
1. Verfasser: Yao, Yuechao (VerfasserIn)
Weitere Verfasser: Feng, Jiangyuan, Xu, Liangfei, Li, Yan, Zhang, Weifeng, Wang, Fuhuan, Yan, Pengfei, Zhang, Jun, Hu, Qiang, Zhou, Yucun, Wang, Shaorong, Li, Jianqiu
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2025
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article high‐entropy perovskite in situ construction reversible solid oxide cells tri‐phase composite electrode
Beschreibung
Zusammenfassung:© 2025 Wiley‐VCH GmbH.
Reversible solid oxide cells (R-SOCs) are promising for energy applications but face limitations due to poor durability and slow oxygen-reduction/evolution reactions at air electrodes. Here, a high-entropy perovskite-based (HEP) tri-phase composite, (La0.2Sr0.2Pr0.2Ba0.2Ce0.2)xCoO3-δ, comprising an A-site deficient La0.2Sr0.2Pr0.2Ba0.2Ce0.2CoO3-δ, doped-CeO2, and Co3O4 phases are presented. The HEP phase provides catalytic sites and robust frameworks, the doped-CeO2 phase enhances oxygen-ion transport; and the Co3O4 nanoparticles offer additional active sites. The optimized (La0.2Sr0.2Pr0.2Ba0.2Ce0.2)0.7CoO3-δ electrode exhibits promising electrochemical performance: a low area-specific resistance of 0.058 Ω cm2 at 700 °C and enhance stability (a 2-fold improvement in ambient air, a 6-fold enhancement in moisture resistance, and a 3-fold increase in Cr tolerance compare to (La0.6Sr0.4)0.95Co0.2Fe0.8O3-𝛿). When applied as an air electrode for R-SOCs, it delivers excellent performance at 800 °C: a peak power density of 1.68 W cm-2 in fuel cell (FC); a current density of 1.5 A cm-2 at 1.2 V in electrolysis cell (EC). Significantly, this work represents the first application of a high-entropy-oxide-based material as an air electrode in large-area R-SOCs (10×10 cm2). The assembled R-SOC achieves an output of 61 W in FC and 66 A at 1.18 V in EC at 800 °C, highlighting its potential for practical applications
Beschreibung:Date Revised 26.08.2025
published: Print-Electronic
Citation Status Publisher
ISSN:1521-4095
DOI:10.1002/adma.202512257