| 초록 |
Solid oxide electrolysis cells (SOECs) represent one of the most efficient and environmentally clean technologies for conversion of steam into hydrogen. The overall reaction of SOEC for steam electrolysis is the reverse of solid oxide fuel cell (SOFC) reaction, and, in principle, the identical cell can operate as both SOFC and SOEC. However, two operating modes differ in the electric potential gradient and gas environment, which significantly affect the performance and stability. In general, SOECs exhibit inferior characteristics compared to SOFCs, which limit the commercialization of this technology. In this study, degradation mechanism of SOEC was clarified, and performance was significantly improved by facilitating the rate limiting processes of the electrodes. Further improvement is expected through the optimization of materials and processing parameters, and eventually, the technique developed in this study could contribute to the successful commercialization of SOEC technology. |
