Advancing Solid Oxide Fuel Cell Performance: Enhanced Electrochemical Properties of Pr1–xCaxBaFe2O5+δ Nanofiber Cathodes via Ca Doping

• DOI: 10.1021/acsami.4c03564
• Publication Date: 2024-07-08T19:15:25Z
• Authors: Xinmin Fu; Xiangwei Meng; Chuxiao Sun; Maobin Wei; Haipeng Jiang; Shiquan Lü; Weijiang Gong
• Keywords: Orthorhombic crystal system

The double perovskite oxide PrBaFe2O5+δ has great potential as a cathode material for solid fuel cells (SOFCs). However, the electrochemical characteristics of Fe-based perovskites are relatively inferior. To improve its performance, Ca is investigated to partially replace Pr, forming Pr1–xCaxBaFe2O5+δ (PCBFx, x = 0.0–0.3) by an electrospinning technique. PCBFx nanofibers exhibited crystalline structure characterized orthorhombic symmetry and space group P4/mmm. Furthermore, these displayed exceptional chemical compatibility with Sm0.2Ce0.8O1.95 (SDC) electrolyte when sintered at temperature 900 °C 5 h. X-ray photoelectron spectroscopy (XPS) analysis reveals progressive increase in Fe4+ concentration doping level rises. polarization resistances (Rp) PCBF00, PCBF01, PCBF02, PCBF03 nanofiber cathodes were 0.103, 0.079, 0.056, 0.048 Ω cm2 750 °C. In meantime, increases peak power density single cell 46%, from 762.80 (PCBF00) 1114.85 (PCBF03) mW cm–2 results demonstrate that exhibit materials SOFCs.