Highly Oxygen Non-Stoichiometric BaSc_0.25 Co_0.75 O_3-δ as a High-Performance Cathode for Intermediate-Temperature Solid Oxide Fuel Cells

Lowering the operating temperature of solid oxide fuel cells (SOFCs) is highly desirable to reduce the cost and increase the lifetime, which relies upon the development of a cathode component with high oxygen reduction reaction (ORR) activity at a lower temperature. Herein, we report the characterization of high‐performance BaSc x Co 1‐ x O 3‐ δ ( x =0, 0.125, 0.25, and 0.375) perovskite SOFC cathodes. Unlike BaCoO 3‐ δ , which adopts...