Synthesis, characterization, and electrochemical properties of Sm0.5Sr0.5Zr1−xNixO3.25−x for solid oxide fuel cell applications

Sm0.5Sr0.5Zr1−xNixO3.25−x (x = 0, 0.1, 0.3, 0.5, 0.7) oxides were synthesized via the solid-state reaction method. The structural and morphological properties were studied by X-ray diffraction, a laser size analyzer, and scanning electron microscopy. The Sm0.5Sr0.5Zr1−xNixO3.25−x (x = 0, 0.1, 0.3, 0.5, 0.7) cathodes were symmetrically deposited on a Ce0,8Sm0,17La0.03O1,9 electrolyte with the spin-coating method, and the area-specific resistance values were determined by electrochemical impedance spectroscopy. Results show that co-doping with the appropriate amount of nickel affects the structural and electrical properties of the cathode compound.