Development of La and Mo Co-Doped SrTiO3 as Novel Anode Material for Solid Oxide Fuel Cell Applications

Abstract

The structural, thermal and electrical attributes of co-doped SrTiO3 system (La3+ at Sr-site and Mo6+ at Ti-site) were studied. The solid solution limit of La in SrTiO3 and Mo in La0.3Sr0.7MoxTi1-xO3-δ was around 30 mol percent and 5 mol percent, respectively. Mo-doping in La0.3Sr0.7TiO3-δ at 1000 °C resulted in improved crystallinity. The impure phase of Pyrochlore (La2Ti2O7) and MoO3 were resulted at a doping concentration of x ≥ 0.05. As a result, the amount of Mo increases, the structural changes are observed. The electrical conductivity of co-doped La0.3Sr0.7Mo0.05Ti0.95O3-δ was found to be 7.3 × 10–5 S.cm−1 at 700 °C in air, indicating its potential as an anode candidate for applications in solid oxide fuel cell (SOFC). © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.