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Structural and electrical characterization of the novel SrCo<sub>1-x</sub>Ti<sub>x</sub>O<sub>3–<em>δ</em></sub> (x = 0.05, 0.1 and 0.15) perovskites: Evaluation as cathode materials in solid oxide fuel cells

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Publication date: April 2019

Source: Renewable Energy, Volume 133

Author(s): V. Cascos, M.T. Fernández-Díaz, J.A. Alonso

Abstract

The SrCoO3-δ perovskite system is able to incorporate Ti at the Co positions, stabilizing a tetragonal perovskite superstructure that combines excellent electronic and ionic conductivity. These materials outperform as cathodes in solid-oxide fuel cells (SOFC). An in situ neutron powder diffraction (NPD) study of SrCo0.95Ti0.05O3−δ between 200 and 800 °C (working conditions of a SOFC) allowed us to analyze the crystal structure and correlate it with the performance. The effect of Ti4+ doping on the thermal, electrical, and electrochemical properties of SrCo1-xTixO3−δ (x = 0.05, 0.1 and 0.15) perovskite oxides is discussed.

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