Abstract The cathode material Pr2-xLaxNi0.85Cu0.1Al0.05O4+δ (PLNCA, x = 0, 0.2, 0.5 and 1.0) was synthesized by an EDTA-citrate process for use in intermediate-temperature solid oxide fuel cells (IT-SOFCs). The phase structure and compatibility of the PLNCA with a La0.9Sr0.1Ga0.8Mg0.2O3 (LSGM) electrolyte was characterized by X-ray diffraction analysis. A test of thermodynamic stability shows that only PrLaNi0.85Cu0.1Al0.05O4+δ can work for 72 h at 700 °C without decomposition. The average thermal expansion coefficient of the PLNCA material matches well with that of the LSGM electrolyte. The electrical conductivity of the PLNCA material varies in the range of 40–80 S cm−1 at 400 °C. The area specific resistance of the PLNCA cathode on LSGM electrolyte was determined to be 0.029, 0.035, 0.036 and 0.037 Ω cm2 for x = 0, 0.2, 0.5, 1.0 at 800 °C, respectively. Moreover, the power density of the electrolyte supported single cell for x = 0, 0.2, 0.5, 1.0 was determined to be 392, 357, 350 and 341 mW cm−2 at 700 °C, respectively. Among PLNCA materials, PrLaNi0.85Cu0.1Al0.05O4+δ shows the best compromise between electrochemical properties and thermodynamic stability and could serve as a potential cathode material for application in IT-SOFCs.

中文翻译：

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用于IT-SOFC的La掺杂Pr2Ni0.85Cu0.1Al0.05O4+δ正极材料的制备及电化学性能

摘要 正极材料 Pr2-xLaxNi0.85Cu0.1Al0.05O4+δ (PLNCA, x = 0, 0.2, 0.5 and 1.0) 是通过 EDTA-柠檬酸盐工艺合成的，用于中温固体氧化物燃料电池 (IT-SOFCs) ）。通过 X 射线衍射分析表征了 PLNCA 与 La0.9Sr0.1Ga0.8Mg0.2O3 (LSGM) 电解质的相结构和相容性。热力学稳定性测试表明，只有 PrLaNi0.85Cu0.1Al0.05O4+δ 才能在 700°C 下工作 72 小时而不分解。PLNCA 材料的平均热膨胀系数与 LSGM 电解质的平均热膨胀系数相匹配。PLNCA 材料的电导率在 400 °C 时在 40–80 S cm-1 的范围内变化。在 800 °C 下，对于 x = 0、0.2、0.5、1.0，LSGM 电解质上 PLNCA 阴极的面积电阻率确定为 0.029、0.035、0.036 和 0.037 Ω cm2，分别。此外，对于 x = 0、0.2、0.5、1.0，电解质支撑的单电池的功率密度在 700°C 下分别确定为 392、357、350 和 341 mW cm-2。在 PLNCA 材料中，PrLaNi0.85Cu0.1Al0.05O4+δ 表现出电化学性能和热力学稳定性之间的最佳折衷，可作为用于 IT-SOFC 的潜在阴极材料。