Abstract: Abstract: Efficient, clean and sustainable energy become the focus of current energy research. Although solar power, wind power and tidal power are promising renewable energy sources, they are site-specific and intermittent, which is not suitable for continuous energy supply. Hydrogen, which is transportable and storable, could serve as an attractive option for energy carrier. Nowadays, it is important to develop a technology for producing hydrogen with high efficiency and low pollution. Solid oxide electrolysis cells (SOEC) based on solid oxide fuel cell (SOFC) technology provides a solution in which hydrogen is produced from water and oxygen is the only by-product. Hybrid hydrogen production integrating solar energy and solid oxide electrolysis cell (SOEC) is an energy conversion device with high performances. In this paper, a hydrogen production system was designed based on intermediate temperature solid oxide electrolysis cell. Solar energy was utilized as the only prime energy sources for the system. The demands of thermal energy and electricity for the hydrogen production were supplied by solar dish and photovoltaic subsystem, respectively and SOEC was the key component of the hybrid system. A new type of solid oxide electrolysis cell, having the symmetrical electrode structure, was proposed and studied in this paper, which was based on the solid oxide electrolysis cell with the conventional structure of anode-electrolyte-cathode. The chemical precipitation method was used to produce the electrolyte material, Ce0.8Sm0.2O1.9-Na2CO3 (NSDC), and to find out the specific electrode material compatible well with the NSDC, the Ni0.8Co0.15Al0.05LiO2-δ (NCAL). X-ray diffraction (XRD) method and scanning electron microscope (SEM) were utilized in this paper for the description as well as the analysis of performance relating to the materials produced. The results showed that the NSDC also has a fluorite structure, the particle size of which was in the range from 30 to 80 nm. Further, the solid oxide electrolysis cell was fabricated though using the NSDC and NCAL obtained earlier. Under SOEC mode and current density of 0.376 A/cm2, the electrolyte voltage was 1.5 V at 823 K. The results of electrochemical experiments showed that a good performance of hydrogen production can be achieved by using the single cell in the electrolysis mode. Moreover, the electrochemical performance still remained in a good condition even the electrodes were switched. According to the theoretical analysis and the experimental results, it can be demonstrated that this new type of cell shows a good structural symmetry. In addition, intermediate-temperature system can promote electrode activity and lessen the over potential. Therefore, it is possible to increase the electric current density and consequently decrease the polarization losses at intermediate temperature, which improves the hydrogen production density and the electrolysis efficiency. Thus, this new hybrid hydrogen production system is advantages from both thermodynamic and kinetic standpoints. The hybrid hydrogen production integrating solar energy operation at intermediate temperature is much more efficient than low-temperature water electrolysis systems such as alkaline water electrolysis and solid polymer electrolyte water electrolysis. The obstacle for the development of SOEC technology is the cost. Fortunately, the cost of this new structure of SOEC with the symmetrical electrode is very low. It is our hope that the results we report here may pave a way for SOEC industrialization.