Carbon assisted solid oxide electrolysis cell (CA-SOEC) owns advantages of fast electrolysis rate, low operating cost and product flexibility. But the endothermic carbon gasification reaction leads to a steep temperature gradient in the anode, thus causing extra thermo-mechanical stress and inhibits long-term operation. Herein, we propose a new CA-SOEC using metal foam in the anode chamber and develop 2D numerical models to evaluate the fluid-dynamic/thermal/chemical/electrochemical/mechanical characteristics of the new cell. It is found that the use of metal foam can significantly enhance the heat transfer process and achieve an even temperature distribution in the CA-SOEC, where the peak temperature difference can be decreased from 57.0 to 21.5 K. As a result, the maximum thermo-mechanical stress is decreased by 69.9 % with the adoption of metal foam. Through further analyses of inlet gas flow rate, inlet gas temperature and the distance between anode chamber and electrode, we find that a small distance and a large flow rate are beneficial for optimizing the temperature distribution. The results of the study provide useful information for the structure optimization of solid oxide cells using carbon fuels.

碳辅助固体氧化物电解槽（CA-SOEC）具有电解速度快、运行成本低、产品灵活等优点。但吸热的碳气化反应导致阳极温度梯度陡峭，从而导致额外的热机械应力并抑制长期运行。在此，我们提出了一种在阳极室中使用金属泡沫的新型 CA-SOEC，并开发了二维数值模型来评估新型电池的流体动力学/热学/化学/电化学/机械特性。结果发现，使用泡沫金属可以显着增强传热过程并在 CA-SOEC 中实现均匀的温度分布，其中峰值温差可以从 57.0 降低到 21.5 K。因此，最大热-机械应力降低 69。9 % 采用金属泡沫。通过进一步分析入口气体流量、入口气体温度以及阳极室与电极之间的距离，我们发现小距离和大流量有利于优化温度分布。该研究结果为使用碳燃料的固体氧化物电池的结构优化提供了有用的信息。