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A solid oxide electrolysis cell (SOEC) is an environmental-friendly device which can convert electric energy into chemical energy with high efficiency. In this paper, the progress on structure and operational principle of an SOEC for co-electrolyzing H2O and CO2 to generate syngas was reviewed. The recent development of high temperature H2O/CO2 co-electrolysis from solid oxide single electrolysis cell was introduced. Also investigated was H2O/CO2 co-electrolysis research using hydrogen electrode-supported nickel (Ni)-yttria-stabilized zirconia (YSZ)/YSZ/Sr-doped LaMnO3 (LSM)-YSZ cells in our group. With 50 % H2O, 15.6 % H2 and 34.4 % CO2 inlet gas to Ni- YSZ electrode, polarization curves (I- U curves) and electrochemical impedance spectra (EIS) were measured at 800 ℃ and 900 ℃. Long-term durability of electrolysis was carried out with the same inlet gas at 900 ℃ and 0.2 A/cm2. In addition, the improvement of structure and development of novel materials for increasing the electrolysis efficiency of SOECs were put forward as well.  相似文献   
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