Effects of Samarium and Yttrium doping on the structural and electrical properties of perovskite materials for SOFC applications
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Advanced materials are critical to driving further progress in solid oxide fuel cell technology to improve efficiency andaccommodate a broader range of fuels. Samarium and Yttrium doped perovskite is synthesized via Sol-gel method. Accordingto XRD examination, the predominant phase possesses a cubic crystal structure derived from the Fm3m space group (number225). A microscope examination reveals the formation of agglomeration and porosity. The SAED patterns of Sm0.5Ce0.5NiO3and Y0.5Ce0.5NiO3 confirm the poly crystalline nature. As samarium and yttrium are introduced, greater oxygen vacanciesform, which impacts the ways grains and grain boundaries form in the material. A combination of various parameters,variations in conductivity and activation energy obey a monotonic trend. Impedance measurement shows a substantialimprovement in conductivity is observed for grain and grain boundaries.
Abstract
Advanced materials are critical to driving further progress in solid oxide fuel cell technology to improve efficiency andaccommodate a broader range of fuels. Samarium and Yttrium doped perovskite is synthesized via Sol-gel method. Accordingto XRD examination, the predominant phase possesses a cubic crystal structure derived from the Fm3m space group (number225). A microscope examination reveals the formation of agglomeration and porosity. The SAED patterns of Sm0.5Ce0.5NiO3and Y0.5Ce0.5NiO3 confirm the poly crystalline nature. As samarium and yttrium are introduced, greater oxygen vacanciesform, which impacts the ways grains and grain boundaries form in the material. A combination of various parameters,variations in conductivity and activation energy obey a monotonic trend. Impedance measurement shows a substantialimprovement in conductivity is observed for grain and grain boundaries.