In this study, a new oxygen-deficient cathode material, Sm0.5Sr0.5Co1-xCuxO3-δ (SSCCu) was developed. It is expected to enhance the efficiency of intermediate-temperature solid oxide fuel cells (IT-SOFCs). The structure, conductivity and electrochemical performance of SSCCu were examined as a function of copper content. The structure of Sm0.5Sr0.5Co0.9Cu0.1O3-δ and Sm0.5Sr0.5Co0.8Cu0.2O3-δ samples was a single orthorhombic perovskite phase. Second phase SrCoO2.8, however, formed in the Sm0.5Sr0.5Co0.7Cu0.3O3-δ and Sm0.5Sr0.5Co0.6Cu0.4O3-δ samples. The conductivity of the Sm0.5Sr0.5Co0.7Cu0.3O3-δ cathode was higher than that of other samples. However, the Sm0.5Sr0.5Co0.8Cu0.2O3-δ electrode exhibited the lowest overpotential of 25 mV at 400 mA cm-2 and the lowest area special resistance of 0.2 Ω cm2 at 700 °C.
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering
- Energy Engineering and Power Technology
- Renewable Energy, Sustainability and the Environment
- Physical and Theoretical Chemistry