双钙钛矿氧化物Ba2Fe1.3Mo0.7O6-δ 作固体氧化物燃料电池阳极的研究

Investigation on Ba2Fe1.3Mo0.7O6-δ Double Perovskite as Anode Material for Solid Oxide Fuel Cell

苏晓刚 宋昭远 张磊磊

Xiaogang SU Zhaoyuan SONG Leilei ZHANG

辽宁石油化工大学 理学院，辽宁 抚顺 113001

College of Science，Liaoning Petrochemical University，Fushun Liaoning 113001，China

通过改变Ba2FeMoO6-δ （BFM）中Fe与Mo的物质的量比调控双钙钛矿晶格B位有序性，制备了一种高性能新型SOFC双钙钛矿阳极材料Ba2Fe1.3Mo0.7O6-δ （BFM0.7）。结果表明，BFM0.7在H2中600~800 ℃的电导率为15.0~20.0 S/cm，远高于SOFC电极的最低标准（0.1 S/cm）。BFM0.7用作SOFC阳极时，单电池在850 ℃的最大功率密度和极化阻抗分别为1 149 mW/cm2和0.15 Ω·cm2。相比于BFM阳极，BFM0.7的性能显著提高。此外，BFM0.7阳极电池连续工作39 h性能无衰减，表明BFM0.7阳极具有优异的电化学稳定性。

The Fe/Mo ordering at B?sites of Ba2FeMoO6-δ (BFM) were changed by adjusting Fe/Mo amount of substance ratio (i.e., stoichiometric ratio), and then a new double?perovskite anode material Ba2Fe1.3Mo0.7O6-δ (BFM0.7) for SOFC were obtained. The results indicated that the electrical conductivity of the BFM0.7 anode is 15.0~20.0 S/cm at 600~800 ℃ in H2, which is much larger than that of the lowest target for SOFC electrode (0.1 S/cm). The peak power density and polarization resistance of the BFM0.7 anode cell attained 1 149 mW/cm2 and 0.15 Ω·cm2 at 850 ℃. Compared with BFM anode, the performance of BFM0.7 is significantly improved. In addition, the performance of BFM0.7 anode cell showed no degradation after testing for 39 h, indicating that the BFM0.7 anode possesses has excellent electrochemical stability.

辽宁省“兴辽英才计划”青年拔尖人才项目(XLYC1807179)

10.12422/j.issn.1672-6952.2024.01.005