Low-temperature sintering and electrical properties of strontium- and magnesium-doped lanthanum gallate with V2O5 additive

▶ The addition of V2O5 enhances the densification of LSGM electrolytes. ▶ The addition of V2O5 increases the phase purity of LSGM electrolyte when sintered at 1200-1350 °C. ▶ V2O5 was not incorporated into LSGM lattice but acted as a precursor for intergranular phase. ▶ The V2O5-doped LSGM exhibits a high ionic conductivity at 700 °C over a wide range of PO2 (10−27-1 atm).