Abstract
Alkaline earth metals (Ca, Sr, Ba) substituted lanthanum copper oxides were investigated to evaluate their potentials as cathode materials for intermediate temperature solid oxide fuel cell (IT-SOFC). The crystal structure, thermal expansion and electrochemical performance of La1−x AE x CuO3−δ (x = 0.3, AE=Ca, Sr, Ba) were studied by X-ray diffraction, thermal dilatometer and impedance spectra, respectively. By lowering the size of the A-site cation in ABO3 perovskite, a lower thermal expansion and polarization resistance were obtained forCa-doped LaCuO3−δ cathode which showed an area specific resistance of 0.19 Ω cm−2 under open circuit potential conditions at 800°C, and a polarization overpotential of 52 mV at a current density of 0.1 A/cm2 at 700°C, being a potential candidate of cathode material for IT-SOFCs.
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This work has been supported by the Doctor Discipline Fund of Nanjing University of Technology (BSCX200501). Authors gratefully appreciate and acknowledge the reviewer’s critical and constructive comments on the manuscript.
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Ding, X., Gao, L., Liu, Y. et al. Thermal expansion and electrochemical properties of La0.7AE0.3CuO3−δ (AE=Ca, Sr, Ba) cathode materials for IT-SOFCs. J Electroceram 18, 317–322 (2007). https://doi.org/10.1007/s10832-007-9173-8
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DOI: https://doi.org/10.1007/s10832-007-9173-8