In Situ Formation of ErBiO Protective Layer at Cobaltite Cathode/YO-ZrO Electrolyte Interface under Solid Oxide Fuel Cell Operation Conditions.

Bismuth-based oxides exhibit outstanding oxygen ionic conductivity and fast oxygen surface kinetics and have shown great potential as a highly active component for electrode materials in solid oxide fuel cells (SOFCs). Herein, a Nb-doped LaSrCoFeNbO (LSCFNb) electrode with 40% ErBiO (ESB) composite electrode was successfully fabricated by decoration method and directly assembled on barrier-layer-free yttrium-stabilized zirconia (YSZ) electrolyte cells, achieving a peak power density of 1.32 W cm and excellent stability at 750 °C and 250 mA cm for 100 h.