Synthesis and Characterization of Bi2TixV1-xO5.5-δ as Electrolyte Material in Solid Oxide Fuel Cell

Abstract

Oxide materials of Bi₂Ti_xV_1-xO_5,5-δ have been synthesized by means of conventional solid state reaction method.
Substitution of Ti atom for the V sites leads to the formation of single phase Bi₂Ti_xV_1-xO_5,5-δ material with I4/mmm space group of tetragonal structure as well as gives results in large grain size and good sinterability of the ceramic material. With Ti concentration of x = 0.2, sample without the presence of porous could be obtained. The ionic conductivity of Bi₂Ti_xV_1-xO_5,5-δ increases significantly with the presence of Ti atoms. This Ti substitution also reduces phase transition temperatures in Bi₂Ti_xV_1-xO_5,5-δ materials. The conductivity data and scanning electron microscope images show that the Ti concentration in Bi₂Ti_xV_1-xO_5,5-δ could be applied as much as x = 0.2, which is higher than reported before and it still gives better properties.