Title of article :
Sm0.5Sr0.5CoO3 − δ–BaCe0.8Sm0.2O3-δ composite cathodes for proton-conducting solid oxide fuel cells
Author/Authors :
Wu، نويسنده , , Tianzhi and Peng، نويسنده , , Ranran and Xia، نويسنده , , Changrong، نويسنده ,
Issue Information :
هفته نامه با شماره پیاپی سال 2008
Pages :
4
From page :
1505
To page :
1508
Abstract :
Electrochemical performance of composite cathodes consisted of an electron–oxygen–ion mixed conductor, Sm0.5Sr0.5CoO3 − δ (SSC), and a proton conductor, BaCe0.8Sm0.2O3 − δ (BCS) was investigated for intermediate temperature solid oxide fuel cells with proton-conducing ceramics as the electrolytes. Interfacial polarization resistance of the composite decreased with SSC content to the minimum at 60 wt.% SSC and then increased. Firing temperature of the cathodes also affected the resistance, and high performance cathode could be obtained by firing at 1050 °C. The minimum interfacial polarization resistance was 0.21 Ω cm2 at 700 °C, where powder density of 0.24 W/cm2 was achieved with humidified hydrogen as the fuel and ambient air as the oxidant. The low interfacial polarization resistance suggests promise applications of SSC–BCS composites as the cathodes for SOFCs based on proton-conducting electrolytes.
Keywords :
? , ?  , BaCe0.8Sm0.2O3  , ? , Proton-conducting ceramic , cathode , solid oxide fuel cells , Sm0.5Sr0.5CoO3  , ? 
Journal title :
Solid State Ionics
Serial Year :
2008
Journal title :
Solid State Ionics
Record number :
1720886
Link To Document :
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