Polarization Resistances of (Ln1−xSrx)CoO3 (Ln=Pr, Nd, Sm, and Gd x=0, 0.3, 0.5, 0.7, and 1) as Cathode Materials for Intermediate Temperature-operating Solid Oxide Fuel Cells

摘要

This study focuses on cathode performances of u0001Ln1u0001xSrxu0002CoO3u0001u0002n(Lnu0003Pr, Nd, Sm, and Gd, xu00030, 0.3, 0.5, 0.7, and 1) for intermediatentemperature-operating solid oxide fuel cells (IT-SOFCs,n600–800°C). u0001Ln1u0001xSrxu0002CoO3u0001u0002 powders as cathode materialsnfor IT-SOFC, which can be operated between 600°C and 800°Cnwere synthesized by the glycine-nitrate-process (GNP) method.nThe impedance spectroscopy method was used to investigate areanspecific resistance (ASR) and electrochemical properties ofnu0001Ln1u0001xSrxu0002CoO3u0001u0002 (Lnu0003Pr, Nd, Sm, and Gd, xu00030, 0.3, 0.5, 0.7,nand 1). Pr0.5Sr0.5CoO3u0001u0002 and Pr0.3Sr0.7CoO3u0001u0002 showed ton0.15 u0004 cm2 of ASR at 700°C and Nd0.5Sr0.5CoO3u0001u0002 ton0.14 u0004 cm2 at 700°C. Sm0.5Sr0.5CoO3u0001u0002 showed the lowest ASRnvalues of 0.10 u0004 cm2 on 10% Gd-doped cerium oxide at 700°C.