Abstract:

As the dual carbon goals and the energy revolution continue to advance, hydrogen energy has received widespread attention as an important clean energy source. Among the various hydrogen production pathways, electrolysis of water into hydrogen by solid oxide electrolytic cell (SOEC) is considered as one of the most promising pathways. In order to better serve the industrialization of SOEC, the current research status and challenges of SOEC need to be sorted out systematically. In this paper, the composition and basic principles of SOEC are introduced firstly. Then, the existing systems and bottlenecks of key materials are summarized based on domestic and international research. Meanwhile, the current research status and development direction of the stack and system are analyzed. Finally, the industrialization process are sorted out. Although electrolysis of water by SOEC has the advantages of high hydrogen production efficiency, low environmental pollution and efficient utilization of waste heat, there are still many difficulties in long-term stable operation and large-scale integration. And a certain gap exists in the industrialization of SOEC in China compared to foreign countries. Improving the stability of materials and optimizing control strategy are the key development directions of SOEC. In addition, accelerating the industrialization process of SOEC also needs to cooperate with the development of upstream and downstream industrial to reduce production costs. With the maturity of technology, electrolysis of water by SOEC is expected to be widely used in chemical industry, distributed energy resources and other fields.

Key words: electrolysis, hydrogen production, solid oxide electrolytic cell, electrode materials, system, industrialization progress

摘要：

随着双碳目标和能源革命的持续推进，氢能作为重要的清洁能源受到广泛关注。在众多的制氢途径中，固体氧化物电解池（solid oxide electrolytic cell， SOEC）电解水制氢被认为是最有前景的制氢途径之一。为更好地服务SOEC电解水制氢的产业化发展，对SOEC技术的研究现状和面临的挑战进行了系统梳理。虽然SOEC电解水制氢具有制氢效率高、环境污染小、余热高效利用等优点，但在长时间稳定运行和大规模集成上还有许多难点问题亟需解决，目前国内SOEC产业化尚在起步阶段，与国外发展水平还有一定的差距。提升材料的稳定性、优化系统控制是SOEC技术的重点发展方向。此外，加快SOEC产业化进程还需要协同发展上下游产业链，进一步降低制备成本。随着技术的成熟，SOEC有望在化工、分布式能源等领域获得广泛的应用。

关键词: 电解, 制氢, 固体氧化物电解池, 电极材料, 系统, 产业化进展