Sulfur Tolerance of La0.3M0.7Fe0.7Cr0.3O3 -δ (M= Sr, Ca) Solid Oxide Fuel Cell Anodes

• DOI: 10.1149/06602.0219ecst
• Publication Date: 2015-05-16T02:31:21Z
• Authors: Paul Kwesi Addo; Beatriz Molero-Sa...; Aligul Buyukaksoy; Scott Paulson; Viola Birss
• Keywords: 13. Climate action; 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Symmetrical full cells, based on La 0.3 M 0.7 Fe Cr O 3- δ (M = Sr, Ca) perovskite oxide electrodes, were constructed, using a Yttria-stabilized zirconia (YSZ) electrolyte with Samaria-doped ceria (SDC) buffer layer, and then tested in range of fuel environments at 800 o C. It is demonstrated that the Ca analog (La 3-δ -LCFCr) an equally good electrode (anode) air (cathode) as Sr member this family (LSFCr), exhibiting very electrochemical performance H 2 , CO +CO atmospheres. LCFCr LSFCr anodes also evaluated presence 9 ppm S exposures, showing small, but reproducible reversible, decrease polarization resistance (Rp). Studies cell polarizations -100 -300 mV from open circuit voltage showed ca. 2-4 % increase current density + 30 recovering fully when was removed.