Abstract
BaCoO3-δ is a potential cathode material because of its mixed ionic and electronic conducting. Unfortunately, the low symmetry structure and oxygen reduction activity of BaCoO3-δ has limited its application on solid oxide fuel cells. Porous structured BaCo0.8Nb0.1Sc0.1O3-δ cubic perovskite is synthesized by template method. The area specific resistance (ASR) of porous BaCo0.8Nb0.1Sc0.1O3–δ is 0.0257 Ω‧cm2 at 700 °C and the activation energy was only 126.8 kJ‧mol−1. The further study shows that the charge transfer process and adsorption-desorption of oxygen process jointly determine the rate-determining-step of porous BaCo0.8Nb0.1Sc0.1O3–δ.
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