Abstract
Development of high performance anode materials with resisting coking and sulfur poisoning is significant for the practical application of solid oxide fuel cells (SOFCs). Here we report a nickel-free double perovskite anode material Sr2TiFe0.5Mo0.5O6–δ (STFM05), which exhibits excellent electrochemical performance using H2 as fuel and acceptable electrochemical stability in syngas fuel containing H2S. At 800 °C, the STFM05 anode shows the electrical conductivity value of 22.3 S cm−1 in H2 and the maximum power densities of 547 and 215 mWcm−2 with electrolyte-supported cell using H2 and syngas as fuels, respectively. The single cell with STFM05 anode shows a relatively stable electrochemical performance in syngas at 750 °C, and no carbon deposition is detected by Raman spectroscopy. In addition, STFM05 anode is thermally and chemically compatible with the La0.9Sr0.1Ga0.8Mg0.2O3−δ and Ce0.8Sm0.2O1.9 electrolytes in reducing atmosphere. These preliminary results suggest that the STFM05 double perovskite is a promising candidate of anode material with coking resistance and sulfur tolerance for use in SOFCs.
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