Abstract
A cobalt-free cubic perovskite oxide, SrFe 0.9Nb 0.1O 3− δ (SFN) was investigated as a cathode for intermediate-temperature solid oxide fuel cells (IT-SOFCs). XRD results showed that SFN cathode was chemically compatible with the electrolyte Sm 0.2Ce 0.8O 1.9 (SDC) for temperatures up to 1050 °C. The electrical conductivity of SFN sample reached 34–70 S cm −1 in the commonly operated temperatures of IT-SOFCs (600–800 °C). The area specific resistance was 0.138 Ω cm 2 for SFN cathode on SDC electrolyte at 750 °C. A maximum power density of 407 mW cm −2 was obtained at 800 °C for single-cell with 300 μm thick SDC electrolyte and SFN cathode.
Published Version
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