A cobalt-free electrode material La0.5Sr0.5Fe0.8Cu0.2O3 (-) (delta) for symmetrical solid oxide fuel cells

作者：Lu, Jun; Yin, Yi-Mei^*; Li, Jingcheng; Xu, Lei; Ma, Zi-Feng

来源：Electrochemistry Communications, 2015, 61: 18-22.

DOI：10.1016/j.elecom.2015.09.020

• Symmetrical solid oxide fuel cell
• Cobalt-free electrode
• La0.5Sr0.5Fe0.8Cu0.2O3- (delta)
• Syngas

Cobalt-free perovskite oxide La0.5Sr0.5Fe0.8Cu0.2O3 (-) (delta) (LSFC) was applied as both anode and cathode for symmetrical solid oxide fuel cells (SSOFCs). The LSFC shows a reversible transition between a cubic perovskite phase in air and a mixture of SrFeLaO4, a K2NiE4-type layered perovskite oxide, metallic Cu and LaFeO3 in reducing atmosphere at elevated temperature. The average thermal expansion coefficient of LSFC in air is 17.7 x 10(-6) K-1 at 25 degrees C to 900 degrees C. By adopting LSFC as initial electrodes to fabricate electrolyte supported SSOFCs, the cells generate maximum power output of 1054, 795 and 577 mW cm(-2) with humidified H-2 fuel (similar to 3% H2O) and 895,721 and 482 mW cm(-2) with humidified syngas fuel (H-2:CO = 1:1) at 900,850 and 800 degrees C, respectively. Moreover, the cell with humidified H-2 fuel demonstrates a reasonable stability at 800 degrees C under 0.7 V for 100 h.

• 出版日期2015-12
• 单位上海交通大学