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Investigation of physical properties of Ce0.90Gd0.05Dy0.05 O2-δ +SrTiO3 novel heterostructures for intermediate–temperature (IT) solid oxide fuel cells
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DOI：10.1016/j.jssc.2026.126179.png)
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Abstract
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• Gd,Dy co-doped CeO2 was successfully integrated with SrTiO3 to form phase-pure fluorite–perovskite heterostructures. • Rietveld refinement confirmed lattice expansion and enhanced oxygen vacancy formation due to rare-earth co-doping. • Raman analysis revealed defect-related modes indicating increased oxygen vacancy concentration at CeO2–SrTiO3 interfaces. • The 70:30 Ce0.90Gd0.05Dy0.05 O2-δ –SrTiO3 composite exhibited the highest conductivity of 1.12 S cm−1 at 650 °C. • Heterointerface engineering significantly improved ionic transport for intermediate-temperature SOFC applications.
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