Abstract

Bismuth-strontium-calcium-copper oxide (BizSnCaCujOs, BSCCO) is known for its high Tc superconducting behavior and mixed conducting property. The applicability of similar high Tc cuprates for intermediate-temperature solid oxide fuel cell (SOFC) application has been studied recently. We investigated the electrochemical behavior of several Ag|BSCC0110 mol% yttria-stabilized zirconia (YSZ)|Ag and Ag|YSZ|Ag cells using complex impedance spectroscopy. A highly uniform and porous microstructure was observed at the interface of the YSZ and BSCCO. The ionic conductivity determined from the Nyquest plots in the temperature range of200-700°C agrees with the values reported in the literature. The specific resistance of the BSCCO|YSZ interface was also determined to be lower than those of the conventional manganite electrode, suggesting that BSCCO seems attractive for cathode applications in SOFC.

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