The effect of Y, Er co-doped on the sintering and electrical properties of Mo0.05 Bi1.95O₃ electrolyte materials for solid oxide fuel cells

Abstract

Bismuth oxide-based electrolyte materials co-doped with yttrium and erbium were synthesized by nitrate combustion method. The crystal structure was analyzed by X-ray diffraction. The data on electrical conductivity were carried out using AC impedance spectroscopy. The results suggested that all of the co-doped bismuth oxide samples obtained [Formula: see text]-phase with cubic fluorite structure. The conductivity of (YO[Formula: see text])[Formula: see text](MoO3)[Formula: see text](ErO[Formula: see text])[Formula: see text](BiO[Formula: see text])[Formula: see text]ceramic electrolyte sintered at 925[Formula: see text]C for 10 h reached 12.26 × 10[Formula: see text] S cm[Formula: see text] at 700[Formula: see text]C. It has good thermal stability and is a promising electrolyte material for SOFC.