Synthesis of LAXSR1-XTIO3 anode materials by sol-gel auto-combustion method

Abstract

A novel anode material for intermediate temperature solid oxide fuel cells with a composite of LaxSr1-xTiO3 has been synthesized by a sol-gel auto-combustion method. X-ray diffraction (XRD) shows that LaxSr1-xTiO3 has good chemical compatibility with Gd0.2Ce0.8O1.9 electrolyte. The thermal expansion coefficient (TEC) of the as-prepared anode material is similar to that of Gd0.2Ce0.8O1.9. The electric conductivity measurements show that the conductivity of LaxSr 1-xTiO3 increases with the increasing of lanthanum contents and reached a maximal value at x=0.3. At 800°C, the electrical conductivity of La0.3Sr0.7TiO3 is 184S cm -1.