直接液体甲醇燃料电池的数学模型

Mathematical Model of a Direct Methanol Fuel Cell (DMFC)

描述了一个用于模拟直接甲醇燃料电池特性的垂直于流道的二维数学模型。模型同时考虑了电化学动力学、水动力学和多组分传递。计算了电池内反应物浓度的分布、电流密度分布、甲醇窜流以及电压 -电流特性曲线等。结果表明 :集流板前的催化层内反应物浓度非常低 ;流道边缘附近电流密度比平均电流密度大许多倍。图 5表 1参

A two dimensional across the channel mathematical model for simulation of a direct methanol fuel cell is described. The model accounts simultaneously for electrochemical kinetics, hydrodynamics, and multicomponent transport. The two dimensional distributions of concentrations of reactants, the two dimensional distributions of current densities, the crossover flux of methanol fromthe anode to the cathode, and current voltage curve for the fuel cell have been calculated. The obtained results indicate that the concentrations of reactants in the catalyst layers in front of the current collectors are very low; the current density at the edges of the channels is many times greater than the mean current density. Figs 5, table 1 and refs 9.