Molten salt synthesis of Nb-doped (La, Sr)FeO3 as the oxygen electrode for reversible solid oxide cells

• DOI: 10.1016/j.matlet.2019.02.116
• Publication Date: 2019-03-01T23:54:13Z
• Authors: Chengzhi Guan; Yudong Wang; Kongfa Chen; Guoping Xiao; Xiao Lin; Jing Zhou; Sanzhao Song; Jian-Qiang Wang; Zhiyuan Zhu; Xiao-Dong Zhou
• Keywords: Clark electrode

Abstract A novel molten salt method was employed to synthesize 10% Nb doped La0.6Sr0.4FeO3−δ (LSFN). The as-synthesized powders were pure and adopted a porous structure. Using LSFN as the oxygen electrode for a reversible solid oxide cell, the button cell exhibited a peak power density of 0.79 W cm−2 in H2 and an electrolysis current density of 0.89 A cm−2 at 1.3 V in 50% CO2/50% H2 at 800 °C. A large fraction of Fe2+ was found in LSFN, resulting in the improved performance. Our results indicate that the molten salt method is a promising approach for the synthesis of highly active perovskite electrode with a dopant of Nb.