Wet chemical synthesis and characterisation of Ba 0.5 Sr 0.5 Ce 0.6 Zr 0.2 Gd 0.1 Y 0.1 O 3−δ proton conductor (original) (raw)

Ba0.5Sr0.5Ce0.6Zr0.2Gd0.1Y0.1O3-δ (BSCZGY) proton conducting electrolyte material for intermediate temperature solid oxide fuel cells (IT-SOFCs) has been synthesized by a sol-gel modified Pechini process and its sinterability, thermal expansion, microstructure, ionic conductivity and chemical stability have been investigated. Ionic conductivity at 700 ºC was measured to be ~ 8 x 10-3 S cm-1 in wet 5 vol% H2/Ar atmospheres. Chemical stability test in pure CO2 up to 1200 ºC shows that the material is highly stable; better than the stability of BaZr0.3Ce0.5Y0.1Yb0.1O3-δ.