Solid Oxide Fuel Cells (SOFCs) are direct electrochemical energy conversion devices, and due to their high efficiency and fuel flexibility, are considered to have high prospects for replacing the conventional sources of power generation. It is also possible to use the high temperature exhaust gases for cogeneration of power thereby improving the efficiency of SOFCs to almost 80% [1]. However the state-of-the-art anode Ni-YSZ (yttria-stabilized zirconia) suffers from coking and sulfur poisoning in the presence of hydrocarbon fuels while the LaSrMnO3 (LSM) cathode's performance is limited by the sluggish bulk oxide-ion mobility and restricted triple-phase boundary for the oxygen reduction reaction (ORR). Perovskite materials of the type ABO3 have shown potential as anode [2] and cathode [3] electro-catalysts for SOFCs due to the possibility of tailoring their electronic and catalytic properties by suitable doping at the A- and the B-sites. The present work is aimed at examining the effect of cerium substitution at the A-site of SrCo0.2Fe0.8O3-d perovskites as electro-catalysts for solid oxide fuel cells. The materials' characterization in terms of their structural stability under anode and cathode conditions, oxygen mobility, catalytic activity and electrochemical performance in button cells will be discussed.   1.         Yokokawa, H., et al., Fundamental mechanisms limiting solid oxide fuel cell durability. Journal of Power Sources. 182 (2): p. 400-412.2.         Voorhoeve, R.J.H., et al., Perovskite Oxides: Materials Science in Catalysis. Science, 1977. 195 : p. 827-833.3.         Ormerod, R.M., Solid oxide fuel cells. Chem. Soc. Review, 2003. 32 .

Strontium cobalt ferrite perovskite materials as electro-catalysts for solid oxide fuel cells: Effect of Ce substitution at the A-site

247th National Meeting (2014)

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