Fuel cell membranes and crossover prevention
    7.
    发明授权
    Fuel cell membranes and crossover prevention 失效
    燃料电池膜和交叉防止

    公开(公告)号:US07569297B2

    公开(公告)日:2009-08-04

    申请号:US11303505

    申请日:2005-12-16

    摘要: A membrane electrode assembly for use with a direct organic fuel cell containing a formic acid fuel includes a solid polymer electrolyte having first and second surfaces, an anode on the first surface and a cathode on the second surface and electrically linked to the anode. The solid polymer electrolyte has a thickness t: t ≥ n f ⁢ D f ⁢ C f ⁢ K f ⁢ j f c where Cf is the formic acid fuel concentration over the anode, Df is the effective diffusivity of the fuel in the solid polymer electrolyte, Kf is the equilibrium constant for partition coefficient for the fuel into the solid polymer electrolyte membrane, ℑ is Faraday's constant nf is the number of electrons released when 1 molecule of the fuel is oxidized, and jfc is an empirically determined crossover rate of fuel above which the fuel cell does not operate.

    摘要翻译: 与含有甲酸燃料的直接有机燃料电池一起使用的膜电极组件包括具有第一表面和第二表面的固体聚合物电解质,第一表面上的阳极和第二表面上的阴极并且电连接到阳极。 固体聚合物电解质具有厚度t: t > = n f mi> 其中Cf是甲酸燃料浓度 在阳极上,Df是固体聚合物电解质中燃料的有效扩散系数,Kf是固体聚合物电解质膜中燃料分配系数的平衡常数,ℑ是法拉第常数nf是当1分子释放的电子数 的燃料被氧化,并且jfc是燃料电池不工作的燃料的经验确定的交叉速率。