Fabrication and Study of LaNi0.6Fe0.4O3-δ and Sm0.5Sr0.5CoO3-δ Composite Cathode

Abstract

In this paper, the composite cathode material of of LaNi0.6Fe0.4O3-δ(LNF) and Sm0.5Sr0.5CoO3-δ(SSC) is investigated and the cell performance of BaCe0.7Y0.2Zr0.1O3-δ(BZCY)-based proton-conducting solid oxide fuel cell (H-SOFC) is evaluated. LNF powders and SSC powders with different ratios (1:0, 7:3, 5:5, 3:7, 0:1 wt. %) are mixed as the composite cathode to explore the optimized composition. The phase structure of the fabricated cathode powders is analyzed through X-ray diffraction method (XRD) and no second phase was observed below 1000oC, showing good chemical compatibility. The electrochemical properties consisted 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 0.10 Ω·cm2 and a relatively high maximum power density of 636 mWcm2 at 700oC. 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.

In-Situ Synthesis of Sm0.5Sr0.5Co0.5O3-δ@Sm0.2Ce0.8O1.9 Composite Oxygen Electrode for Electrolyte-Supported Reversible Solid Oxide Cells (RSOC)

“…Mixed ionic conductors, which are suitable for RSOC oxygen electrodes due to their excellent ionic and electronic conductivity [5], have been well developed in recent years. Sm 0.5 Sr 0.5 CoO 3-δ (SSC) has attracted a lot of attention due to its excellent electrochemical performance and high mixed ion conductivity [12]. Sm 0.5 Sr 0.5 CoO 3-δ -Ce 0.8 Sm 0.2 O 1.9 (SSC-SDC) and SSC-GDC composite cathodes showed the improved performance in solid oxide fuel cell and electrolysis cell compared with LSM oxygen electrode [13][14][15][16][17][18].…”