Journal
CHEMISTRY OF MATERIALS
Volume 22, Issue 3, Pages 883-892Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm901720w
Keywords
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Funding
- Ministry of Knowledge Economy (MKE)
- Ministry of Education and Science Technology (MEST)
- Korean Electric Power Research Institute (KEPRI)
- Republic of Korea. Additionally
- Engineering and Physical Sciences Research Council (EPSRC)
- Carbon Trust of the United Kingdom
- Carbon Vision and Platform
- Engineering and Physical Sciences Research Council [EP/E064248/1] Funding Source: researchfish
- EPSRC [EP/E064248/1] Funding Source: UKRI
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The electrochemical characteristics of the samarium and strontium doped layered perovskite (SmBa1-xSrxCo2O5+delta), x = 0.5) have been investigated for possible application as a cathode material for ail intermediate temperature-operating solid oxide fuel cell (IT-SOFC). The cathodic polarization of single-phase and composite cathodes with 10 mol % gadolinia-doped ceria (Ce0.9Gd0.1O2-delta, CGO91) shows that a weight ratio between SmBa0.5Sr0.5Co2O5+delta (SBSCO) and CGO91 of 1:1 (50 wt % SBSCO and 50 wt% CGO91, SBSCO:50) gives the lowest area specific resistance (ASR) of 0.10 Omega cm 2 at 600 degrees C and 0.013 Omega cm(2) at 700 degrees C. The maximum and minimum electrical conductivity in SBSCO are 1280 S cm(-1) at 50 degrees C and 280 S cm(-1) at 900 degrees C, with the influence of oxygen partial pressure indicating p-type conduction. The maximum power density of SBSCO:50 in an anode supported SOFC was 1.31 W cm(-2) at 800 degrees C and 0.75 W cm(-2) at 700 degrees C.
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