Fabrication and study of LaNi0.6Fe0.4O3-δ and Sm0.5Sr0.5CoO3-δ composite cathode for proton-conducting solid oxide fuel cells

Herein, new composite cathode material, aiming at optimizing the cell performance of BaCe0.7Y0.2Zr0.1O3-delta(BZCY)-based proton-conducting solid oxide fuel cell(H-SOFC), is investigated through mingling LaNi0.6Fe0.4O3-delta(LNF) with Sm0.5Sr0.5CoO3-delta(SSC) at different ratios (1:0, 7:3, 5:5, 0:1 wt%). The phase structure of the fabricated cathode powders is analyzed through the X-ray diffraction method (XRD) and no second phase is observed at 1000 ?, showing good chemical compatibility. The electrochemical properties consisting of I-V and EIS curves reveal that the single-cell with LNF-SSC73 cathode has the best electrochemical performance, exhibiting a polarization resistance of 0.039 omega.cm(2) and a relatively high maximum power density of 1427 mWcm(2) at 700 ?. These results above indicate that LNF-SSC73 composite material could improve the performance of fuel cells, which would be a prospective material in the field of H-SOFC.

Automated summary

The new composite cathode material consisting of LaNi0.6Fe0.4O3-δ (LNF) and Sm0.5Sr0.5CoO3-δ (SSC), namely LNF-SSC73, shows promising electrochemical performance in proton-conducting solid oxide fuel cells, indicating its potential for improving fuel cell performance.