The 62th CerSJ Awards for Academic Achievement in Ceramic Science and Technology: Wet preparation and characterization of ScSZ thin film electrolyte on micro-cathode supports

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  • Wet preparation and characterization of ScSZ thin film electrolyte on micro-cathode supports

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Preparation of a dense Sc2O3-doped ZrO2 (ScSZ) thin film electrolyte on a microtubular cathode support was accomplished using wet coating process and subsequent co-sintering. The microtubular (La,Sr)MnO3 (LSM) cathode support had a 1.6 mm diameter and approximately 30% open porosity. The cell, with 20 μm thick ScSZ electrolyte, was electrochemically evaluated in a humidified (3% H2O) hydrogen atmosphere. The microtubular cells exhibited a stable open circuit voltage above 1.05 V in the temperature range from 550 to 750°C. Maximum power densities of 46.5, 163.2 and 452.8 mW/cm2 were generated at 550, 650 and 750°C, respectively. The results indicate that this preparation of a thin film ScSZ electrolyte effectively realized a stable, high performance LSM-supported micro SOFC.

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