固体氧化物电解池（SOEC）是将电能和热能转化为化学能的储能装置，废气是高温工业在化石燃料燃烧时产生的含大量CO2、水蒸气的气体，谷电是低谷时段的夜间电。使用谷电进行SOEC电解高温废气产生合成气，对CO2减排，余热、谷电利用或可再生能源储存都具有重要应用价值。废气中杂质气体SO2和O2分别对SOEC燃料极具有毒化和活化作用，是影响SOEC电解废气运行及合成气产率的关键因素。本课题拟采用电化学测试、原位拉曼光谱、微观结构表征、尾气定量分析和结合力测试等各种方法研究SOEC燃料极抗硫失效情况、受氧活化行为、电极反应过程、催化反应机理和运行衰减规律等，探明杂质气体对电极的毒化与活化机制；利用二维层状纳米超氧离子导体修饰燃料极，增加电极反应位点数量、提高氧传输、优化微结构，探讨抗硫毒化能力提升技术及其机制。研究成果将为电解前对杂质气体的预处理及SOEC高性能电解废气提供理论依据。

Solid oxide electrolysis cell (SOEC) is a kind of energy storage device that can convert electrical energy and heat energy into chemical energy. Flue gas is the gas produced by the high temperature industry during the combustion of fossil fuels, which contains a large amount of CO2 and steam. The off-peak electricity is the night electricity in the low valley period. The use of off-peak electricity to produce syngas via SOEC electrolysis of high temperature flue gas has important applications for the reduction of CO2 emission, waste heat utilization, off-peak electricity utilization or renewable energy storage. The impurities SO2 and O2 in the flue gas have the poisoning and activation effect on the fuel electrode of SOEC, respectively. They are the key factors affecting the SOEC electrolysis of high temperature flue gas and the productivity of syngas. This project intends to combine with the electrochemical test, in-situ Raman spectroscopy analysis, microstructure characterization, quantitative analysis of tail gas and bonding force test to investigate the sulphur resistance failure, oxygen activation behavior, electrode reaction process, catalytic reaction mechanism and degradation rule of SOEC fuel electrode, obtain the mechanism of electrode poisoning and activation by impurity gas in flue gas. The two-dimensional layered nanoscale superior oxide-ion conductor will be used to modify the fuel electrode, so as to increase the number of effective reaction sites, improve oxygen transport and optimize microstructure. The technology and mechanism of enhancing the resistance to sulphur poisoning will be discussed. The research results will provide the theoretical basis for the pretreatment of impurity gas before electrolysis and high performance SOEC electrolysis of high temperature flue gas.