Abstract
The double-perovskite (SMMO) was investigated as an anode material of a solid oxide fuel cell. Via a synthetic method based on thermal decomposition of metal complexes with ethylenediaminetetraacetic acid as the complexant, phase-pure SMMO was readily obtained. Oxygen vacancies are introduced by reduction with 5% at . With a thick disk as the electrolyte and as the cathode, the SMMO anode showed power densities of in and in at . Moreover, it performed stably on power cycling and tolerated sulfur and moisture well. Only 1% degradation in the output was observed in containing and 16% degradation in containing compared with the output in pure . Thermogravimetric analysis showed a drop in mass at around in the atmospheres of both air and 5% , indicative of the formation of oxygen vacancies. The mean thermal expansion coefficient was at the operating temperatures. The conductivity strongly depended on the atmosphere, and the electronic activation energies were in and in . Our results show that SMMO is a potential anode material for operation with natural gas.
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