Solid electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFCs)

Abstract

The project involved in the making of the intermediate temperature solid oxide fuel cell by several compositions. The project has started with La0.₂Sr0.₂5Ca0.₄₅TiO₃ as a parent composition. However, the author try to discover the differences of compositions by doing the parent composition as La0.₂Sr0.₂₅Ca0.₄₅Ti1-xMxO₃ (M=Zr₂O₃) where 0.1≤ x ≤ 1. The project focus on the XRD, Impedance, SEM and TGA. Highscore Plus software have been used to analyze the XRD refinement. The project was using solid state synthesis to produce intermediate temperature solid oxide fuel cell. The composition mixed with strontium carbonate, titanium oxide, lanthanum oxide, strontium carbonate and zirconium oxide. All the samples are heated 1400˚C for 12 hours. After all, the XRD was performed to all samples by using XRD Bruker D2 Phaser model. The parent composition indicates single phase which results pbnm space group. Ac impedance studies revealed their semi-conducting behavior in air. Furthermore, the doped composition shifted to the lower angle theta revealed the new parent composition. B-site doping could effect the XRD pattern from parent composition making them viable alternatives for fuel cell applications