Abstract
Performance of an La0.6Sr0.4Fe0.8Co0.2O3- (LSCF)––Ag/(Ag0.9Co0.1) cathode on a Ce0.8Sm0.2O1.9 electrolyte was studied. The effect of Co alloying on Ag-impregnated Ag + LSCF cathode for the oxygen reduction reaction in intermediate temperature solid oxide fuel cells has been studied in detail. The results indicate that an addition of 10 mol.% Co effectively inhibits the growth and coalescence of Ag particles at high temperatures. As a consequence, the electrochemical performance and stability of the cathode are significantly improved. The electrochemical performance of the Ag + LSCF and Ag0.9Co0.1 + LSCF cathodes is much better than that of the mixed ionic and electronic conducting oxide cathodes LSCF.
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