Double substituted NdBa(Fe,Co,Cu)2O5+δ layered perovskites as cathode materials for intermediate-temperature solid oxide fuel cells-correlation between structure and electrochemical properties

In this work, double-doped NdBa(Fe,Co,Cu)(2)O5+delta layered perovskites were prepared by solid state reaction method and comparatively examined. Physicochemical analysis included structural characteristics, linear thermal expansion coefficient, oxygen nonstoichiometry, electrical conductivity, and electrochemical performance of the materials. NdBaCo1.5Cu0.5O5+delta (NBCC2) and NdBaFeCoO5+delta (NBFC) materials exhibited good electrical conductivity and linear thermal expansion coefficient relatively matched to common electrolyte materials. Electrochemical impedance spectroscopy measurements in argon-oxygen mixtures demonstrated promising performance of the synthesized materials as cathode materials for solid-oxide fuel cells. The NBCC2 material showed the lowest polarization resistance of 0.17 (800 degrees C) and 0.67 (700 degrees C) Omega cm(2) at P(O-2) P-1 = 0.2.

Automated summary

Double-doped NdBa(Fe, Co, Cu) (2)O5+delta layered perovskites were prepared and examined in this study. The physicochemical analysis showed that these materials have good electrical conductivity and linear thermal expansion coefficient, making them suitable as cathode materials for solid-oxide fuel cells.