부산대학교 도서관

Tubular SOECs whose operating temperature is reduced to 700~800oC are developed to apply to the nuclear power systems without losing the SOECs merit. To improve cell performance at the low temperature, Sc2O3 stabilized ZrO2 is chosen as electrolyte material and the thickness of the electrolyte layer is tried controlling about 10um. Tubular testing electrolysis cells are fabricated by using slurry coating method. Dependence of the cell performance on operating conditions is measured. Further, AC impedance method is applied to the cells to estimated interfacial overvoltage. From the experiment, it is clarified that the hydrogen production rate at 800 oC is achieved 2.5~2.7 sccm/cm2 at the thermoneutral voltage (1.3V) under practical steam utilization. This value is comparable to that of the commercial electrolysers.