梯度颗粒阳极固体氧化物燃料电池电性能的数值研究

Numerical Study on Electrical Performance of Solid Oxide Fuel Cell With Gradient Particle Size Anode

本文通过建立梯度颗粒阳极固体氧化物燃料电池(Solid Oxide Fuel Cell,SOFC)的三维数学模型,系统地研究了梯度颗粒阳极SOFC的电性能,深入分析了梯度颗粒阳极对SOFC电性能的影响机理。研究发现,梯度颗粒阳极设计可以有效降低阳极内的活化极化、浓度极化和欧姆极化。在本文的参数设置下,梯度颗粒阳极设计的SOFC最大输出功率密度可达到0.90 W·cm^(-2),相比于颗粒尺寸为0.5μm、1.0μm和1.5μm的阳极SOFC,增幅分别为2.59%、10.30%和16.26%。因此,梯度颗粒阳极设计的SOFC可以显著提高电池的电性能。

In the present paper, a three dimensional mathematic model of a solid oxide fuel cell （SOFC） with a gradient particle size anode was established to study the electrical performance of the SOFC. The effect mechanism of the gradient particle size anode on the cell performance was deeply discussed. Results show that the gradient particle size anode design can effectively reduce the anodic activation, concentration and ohmic overpotentials. The maximum output power density of the gradient particle size anode design in this paper can reach 0.90 W·cm^-2, which is 2.59%, 10.30% and 16.26% higher than that of homogeneous SOFC with anode particle size of 0.5μm, 1.0μm and 1.5μm, respectively. It can be concluded that the gradient particle size anode design can significantly improve the electrical performance of SOFC.