Preparation and Characterization of Pr0.6Sr0.4CoO3-δ Cathodes in IT-SOFC

Tuesday, 28 July 2015: 11:20
Boisdale (Scottish Exhibition and Conference Centre)
R. Kanarbik, I. Kivi, T. Tiirats, P. Möller, and E. Lust (Institute of Chemistry, University of Tartu)
The Pr0.6Sr0.4CoO3-δ (PSC) and La0.6Sr0.4CoO3-δ (LSC) SOFC cathodes were prepared and deposited onto Ce0.9Gd0.1O2-δ | Zr0.85Y0.15O2-δ | Ni-Zr0.85Y0.15O2-δ anode supported half-cells for cyclic voltammetry, electrochemical impedance and chronoammetry analysis. The electrochemical analysis has been conducted under various working temperatures from 550 °C to 800°C and under various fuel and compositions. The performances of PSC and LSC based single cells at 800 °C were comparatively high with maximum power output 1.48 W/cm2 and 1.28 W/cm2, respectively. It was established that the power output under the same conditions for PSC based SOFC single cell showed slightly higher values comparing to LSC based cells. Short term stability tests show that the both materials have good stability at 700 °C and at cell potential 0.8 V and power output 540 mW/cm2.