Finite element analysis is an effective method to investigate the uniformity of species distribution in solid oxide fuel cells. This paper presents a 3-D model with coupled mass transport, electron transfer and electrochemical reaction. Based on a working anode-supported SOFC with gas channels and porous electrodes, the model is validated by measured IV curves. The simulated results deviate no more than 3% from the measured data and indicate significant dependency of current density distribution on the gas composition distribution. Meanwhile, the simulated results also indicate that the ridges of the interconnect have negative effects on electrochemical reaction due to the limitation of mass transport. In further study, cases of various channel widths are calculated and analyzed, finding that the optimal width ratios for electrochemical in cathode and anode are 0.5.

有限元分析是研究固体氧化物燃料电池中物种分布均匀性的有效方法。本文提出了一个具有耦合质量传输，电子转移和电化学反应的3-D模型。基于具有气体通道和多孔电极的工作阳极支撑的SOFC，该模型通过实测I进行了验证。V曲线。模拟结果与测量数据的偏差不超过3％，表明电流密度分布对气体成分分布的显着依赖性。同时，模拟结果还表明，由于质量传输的限制，互连的脊对电化学反应具有负面影响。在进一步的研究中，对各种通道宽度的情况进行了计算和分析，发现在阴极和阳极中电化学的最佳宽度比为0.5。