Abstract A novel Pr2NiO4 (PNO)-Pr0.2Ce0.8O1.9 (PCO) composite material was synthesized by typical solid state mixing and modified sol-gel method, and was assessed as a cathode material candidate for intermediate temperature solid oxide fuel cells (IT-SOFCs). The effects of different preparation methods on the microstructure, transport properties, and stability of electrode materials were systematically investigated. It was found that the introduction of PCO enhanced the electrochemical activity of PNO electrode. Among the composite materials, PNO–PCO composite cathode obtained by sol-gel method exhibited the best electrochemical performance. The polarization resistance (RP) on GDC electrolyte was 0.09 Ω cm2 at 800 °C. The NiO-GDC/GDC/PNO–PCO single cell yielded maximum output power of 0.57 W cm−2 at 800 °C. Furthermore, the RP exhibited an excellent stability after polarization for 120 h, indicating the good chemical compatibility of PNO–PCO composite cathode with other cell components. The desirable electrochemical properties and stability of PNO–PCO composite demonstrate its potential as a cathode material for IT-SOFCs.

中文翻译：

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Pr2NiO4-Pr0.2Ce0·8O1.9复合阴极作为中温固体氧化物燃料电池的潜在阴极材料

摘要 采用典型的固态混合和改进的溶胶-凝胶法合成了一种新型 Pr2NiO4 (PNO)-Pr0.2Ce0.8O1.9 (PCO) 复合材料，并被评估为中温固体氧化物燃料电池的正极材料候选材料。 IT-SOFC）。系统研究了不同制备方法对电极材料微观结构、传输性能和稳定性的影响。发现PCO的引入增强了PNO电极的电化学活性。在复合材料中，溶胶-凝胶法制备的PNO-PCO复合正极表现出最好的电化学性能。GDC 电解质的极化电阻 (RP) 在 800 °C 时为 0.09 Ω cm2。NiO-GDC/GDC/PNO-PCO 单电池在 800 °C 下产生的最大输出功率为 0.57 W cm-2。此外，RP 在极化 120 小时后表现出优异的稳定性，表明 PNO-PCO 复合阴极与其他电池组件具有良好的化学相容性。PNO-PCO 复合材料的理想电化学性能和稳定性证明了其作为 IT-SOFC 阴极材料的潜力。