Preparation of IT-SOFC with Pr2NiO4 cathode and hybrid Ce0.8Sm0.2O1.9 electrolyte

Abstract

Pr2NiO4 (PNO) powders were synthesized by the glycine-nitrite process (GNP) for use as the cathode in an intermediate-temperature (500-800 degrees C) solid oxide fuel cell (IT-SOFC). When PNO powder was calcined at 1200 degrees C for 1 h, the pure single phase with good crystallization K2NiF4-type structure was obtained. Moreover, samarium doped ceria (Ce0.8Sm0.2O1.9, SDC) and NiO-SDC were used as electrolyte and anode, respectively. The maximal power density of 439 mW/cm(2) was obtained by the PNO/SDC/NiO-SDC cell at 800 degrees C. Furthermore, the electrolyte surface of co-pressed SDC/NiO-SDC was modified with a chemical solution deposition derived SDC layer to improve the cell performance. Besides, the power density of the PNO/SDC layer/SDC/NiO-SDC cell increased to 487 mW/cm(2) at 800 degrees C. These results suggest that PNO cathode materials prepared by GNP and chemical solution deposition modified SDC electrolyte have potential for application in anode-supported IT-SOFCs. (C) 2019 The Ceramic Society of Japan. All rights reserved.