China Nonferrous Metallurgy

Solid oxide electrolysis cell (SOEC) can efficiently and cleanly couple with renewable energy and convert it into chemical energy. It is an efficient and environmentally friendly energy conversion device, but there is a problem of long-term operational performance degradation, which is also the key to achieving large-scale commercialization of hydrogen production through solid oxide electrolysis of water. This article briefly introduces the development history, categories, composition, and operating principles of SOEC. Elaborating on the advantages, disadvantages and operating costs of this technology. The main factors causing performance degradation of SOEC are analyzed, including its composition, operating mode, connecting plate material, and operating conditions. Finally, the research status and future development trends of SOEC are analyzed through the number of papers and patents. It is believed that although the development of solid oxide fuel cells (SOFCs) is relatively mature, but due to current environmental needs, in order to fully utilize clean energy and reduce carbon emissions, the large-scale commercialization of SOEC hydrogen production technology is bound to be the direction of future industry development. At present, the performance stability and low-cost preparation of SOEC are the main problems，facing the development of this technology.