Abstract
The Ruddlesden-Popper materials La1.5Pr0.5Ni0.95−xCuxAl0.05O4+δ (x = 0, 0.1, 0.25, 0.5, 0.75, 0.95), La1.5Pr0.5NiO4+δ, and La1.5Pr0.5CuO4+δ have been synthesized by the sol-gel method as cathode materials on the SDC (Sm0.2Ce0.8O1.9) electrolyte for intermediate-temperature solid oxide fuel cells (IT-SOFCs). The cathode materials sintered at 700 and 800 °C for 72 h, also showing good phase stability. The maximum conductivity of this series reached approximately 50 S cm−1 at 350 °C with x = 0.25. The lowest area-specific resistance (ASR) of the cathode measured on the SDC was 0.04 Ω cm2 at 800 °C with x = 0.1. The maximum power density of the SDC-supported single-cell reached 530 mW cm−2 at 800 °C with x = 0.1. Among all of the samples, La1.5Pr0.5Ni0.85Cu0.1Al0.05O4+δ exhibited excellent electrochemical performance, making it a promising candidate cathode material for IT-SOFCs.
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