Abstract
Pr2CuO4 (PCO) is one of the compounds in the Ln2CuO4 (Ln=Pr, Nd, and Sm) group, which exhibits a Ruddlesden–Popper structure. PCO powders were prepared using a glycine nitrate process for cathode application in an intermediate-temperature solid oxide fuel cell (IT-SOFC) and its properties were characterized using X-ray diffractometry, scanning electron microscopy, and alternating current impedance spectroscopy. The PCO cathode demonstrated favorable chemical stability with the electrolyte material of Sm0.2Ce0.8O1.9 (SDC) under 1100°C. The calculated thermal expansion coefficient of PCO was 1.212×10−5K−1. To reduce the resistance further, the PCO powders were mixed with various wt% of SDC. PCO mixed with 10wt% SDC exhibited the lowest area-specific resistance of 0.3505Ωcm2 for Ag/PCO-10wt% SDC/SDC/Ag structure at 800°C in air. The maximal power density was obtained as 347.50mWcm−2. These results indicate that the PCO–SDC composite is a promising candidate for cathode application in IT-SOFCs.
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