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该文基于电荷传输与质量传递过程,充分考虑三相界面的影响因素,改进了原有的固体氧化物电解池(SOEC)阳极浓差过电势模型,所建立的新模型获得了实验验证。根据阳极结构参数及电解池运行条件,对阳极浓差过电势的影响进行了系统分析。研究表明:增大阳极孔隙率和孔径,增大阳极表面的氧分压都能够减小阳极浓差过电势,而增加扩散层厚度则不能降低阳极浓差过电势。
Based on the process of charge transfer and mass transfer, the influence factors of the three-phase interface are fully considered, and the SOCE anode concentration overpotential model is improved. The new model is validated experimentally. According to the parameters of anode structure and operating conditions of electrolytic cell, the influence of anode concentration overpotential was systematically analyzed. The results show that increasing the anode porosity and pore size and increasing the oxygen partial pressure on the anode can reduce the anode concentration overpotential while increasing the diffusion layer thickness can not reduce the anode concentration overpotential.