Synthesis and Characterization of (Gd, Y)-Doped Ceria Electrolytes for Solid Oxide Fuel Cell

Abstract:

Ceria electrolytes co-doped with Gd3+ and Y3+ (Ce0.8Gd0.2-xYxO1.9) were synthesized by GNP. The crystal structures, lattice parameters and crystallite sizes were determined by XRD. The morphology of the powders was observed by TEM. Sintered at 1250oC for 4 h, all die-pressed ceria pellets achieved densities higher than 95% of theoretical values. The ionic conductivities were measured using AC impedance technique and Ce0.8Gd0.05Y0.15O1.9 showed a higher ionic conductivity than those of other compositions at 500-750oC, indicating that it is an attractive electrolyte material for IT-SOFC.

• Periodical: Key Engineering Materials (Volumes 336-338)
• Pages: 395-397
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.336-338.395
• Online since: April 2007
• Authors: Zhi Hui Liu, Xiang Feng Guan, He Ping Zhou
• Keywords: AC Impedance, Ceria, GNP, Solid Oxide Fuel Cell (SOFC)

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