Electrochemical properties of Sr-doped layered perovskite as a promising anode material for direct hydrocarbon SOFCs

Abstract

A direct utilization of hydrocarbon fuels in solid-oxide fuel cell (SOFC) has been considered a worthwhile and realizable goal. Admittedly, while great strides have been made toward this development goal, there still remain Ni-based anode materials issues to be resolved. In this regard, this study focuses on Sr effect on electrical and electrochemical behaviors in PrBaMn2O5+delta(PBM) to be employed as an anode in SOFC operation under hydrogen and hydrocarbon fuels. The electrical conductivity of A-site layered PrBa0.8Sr0.2Mn2O5+delta(PBSM) oxide reaches 3.74 S cm(-1)at 800 degrees C in H-2, which is higher than that of PBM due to doping smaller Sr into Ba site and fully meets the requirement to be employed as an anode material. The electrochemical performance is evaluated using La(0.9)Sr(0.1)Ga(0.8)Mg(0.2)O(3-delta)electrolyte-supported cell based on A-site layered PBSM anode with Co-Fe catalysts, and shows peak power density around 1.38 and 0.68 W cm(-2)at 800 degrees C in H(2)and C3H8, respectively. Considering the electrical and electrochemical properties, A-site layered PBSM might offer the opportunities to discover and explore new high-performance anode material for direct hydrocarbon SOFCs.