International Scientific Journal


The 3-D backbones with ionic conductivity are first built by sintering Ce0.8Sm0.2O1.9 silks, then Ca3Co2O6 nanoparticles as electrocatalyst are filled in by infiltrating ionic solution, as a result, a hybrid electrode with hierarchical structure is constructed as the cathode of solid oxide fuel cells. Compared with the single-phase Ca3Co2O6 bulk cathode and common Ca3Co2O6-Ce0.8Sm0.2O1.9 composite one, this hybrid electrode is very active for oxygen reduction reaction. At 800°C, area specific resistance with this cathode is reduced to 0.062 Ωcm2, and power density peak with the electrolyte-supported single-cell is promoted to 760 mW/cm2. The superior catalytical activity is attributed to the enlarged area for surface oxygen exchange kinetics and enhanced ionic transport behaviour.
PAPER REVISED: 2019-09-29
PAPER ACCEPTED: 2019-09-29
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