Zn-Doped Perovskite as a High-Performance Bifunctional Cathode for Solid Oxide Cells

作者：Li Zhang, Haixia Zhang, Yuxi Sun, Jingyi Ding, Yubo Jiang, Yang Yang, Chuangang Yao · 发表于：ACS Sustainable Chemistry & Engineering · 年份：2025 · DOI：10.1021/acssuschemeng.5c10197 · 被引用次数：6 · 研究领域：Advancements in Solid Oxide Fuel Cells、Magnetic and transport properties of perovskites and related materials、Chemical Looping and Thermochemical Processes

Solid oxide fuel cells (SOFCs) have garnered significant attention due to their high efficiency and pollution-free characteristics. The performance of SOFCs is critically dependent on the development of highly active and stable cathode materials. This study reports Zn-doped Pr 0.5 Ba 0.5 Fe 0.9 Zn 0.1 O 3−δ (PBFZ) as a novel high-performance perovskite cathode material. Experimental results demonstrate that introducing a minor quantity of Zn into the B-site of the Pr 0.5 Ba 0.5 FeO 3−δ (PBF) significantly increases the oxygen vacancy concentration, accelerates cathodic oxygen reduction (ORR) kinetics, and enhances tolerance to CO 2, thereby leading to superior electrochemical performance. Tests revealed that a full cell employing PBFZ as the cathode achieved exhibiting a peak power density (PPD) of 762.9 mW cm –2 at 800 °C under fuel cell operation, representing an approximately 40% improvement compared to the PBF material. Furthermore, under CO 2 electrolysis mode (800 °C, 1.5 V), a current density of 1.33 A cm –2 is achieved by the cell. These results highlight the potential of PBFZ as a viable cathode material applicable to both SOFCs and SOECs.