Patent ID: 8802316

Claim:
A solid-oxide fuel cell, comprising: an electrolyte; an anode electrically coupled to a first surface of the electrolyte; and a cathode electrically coupled to a second surface of the electrolyte, the cathode comprising a porous mixed ionic-electronic conductor (MIEC) having a porosity in a range from about 20% to about 70% and comprising a plurality of pores, and the cathode further comprising an oxygen-reducing catalyst coating, where the oxygen-reducing catalyst coating comprises an oxygen-reducing catalyst where, the porous mixed ionic-electronic conductor comprises a perovskite having a composition La 1-x A x B 1-y B′ y where A comprises a strontium (Sr) element at the A-site of the perovskite, B comprises a cobalt (Co) element at the B-site of the perovskite, and B′ comprises an iron (Fe) element at the B-site of the perovskite, and where 0≦x<1 and 0≦y<1 and where, the oxygen-reducing catalyst is selected from a group consisting of lanthanum strontium manganite (LSM), strontium-doped samarium cobaltite (SSC), calcium-doped lanthanum cerate (LCC), calcium-doped lanthanum zirconate (LCZ), gadolinium-doped ceria (ODC) and samaria-doped ceria (SDC) and where, the oxygen-reducing catalyst coating has a thickness in a range from about one monolayer to about 30 nm and where, some portion of the plurality of pores in the porous mixed ionic-electronic conductor (MIEC) have a pore surface where the oxygen-reducing catalyst coating is directly on the pore surface.