公开(公告)号：US20080311463A1

公开(公告)日：2008-12-18

申请号：US12130420

申请日：2008-05-30

申请人： Jun-Young PARK ,  Seung-shik Shin ,  Mee-young Lee ,  Tae-keun Kim

发明人： Jun-Young PARK ,  Seung-shik Shin ,  Mee-young Lee ,  Tae-keun Kim

IPC分类号： H01M4/96

CPC分类号： H01M8/0245 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0243 ,  H01M8/04119 ,  H01M8/1004 ,  H01M8/1011 ,  Y02E60/523

摘要： A membrane electrode assembly in a fuel cell system includes a cathode electrode that includes a support layer; a catalyst layer; and a first carbon layer and second carbon layer between the support layer and the catalyst layer, the first carbon layer having a relatively higher porosity and the second carbon layer having a relatively lower porosity. Therefore, the membrane electrode assembly maintains good ion conductivity in the polymer electrolyte membrane by suppressing the movement of water molecules from the polymer electrolyte membrane to the cathode electrode using a water pressure between two carbon layers having different porosity. Also, a flooding phenomenon in the cathode electrode is prevented, thereby maintaining the smooth movement of the oxidizing agent in the cathode.

摘要翻译： 燃料电池系统中的膜电极组件包括：包括支撑层的阴极; 催化剂层; 以及在所述支撑层和所述催化剂层之间的第一碳层和第二碳层，所述第一碳层具有相对较高的孔隙率，并且所述第二碳层具有相对较低的孔隙率。 因此，通过使用具有不同孔隙率的两个碳层之间的水压抑制水分子从聚合物电解质膜向阴极的移动，膜电极组件在聚合物电解质膜中保持良好的离子传导性。 此外，防止阴极中的淹水现象，从而保持氧化剂在阴极中的平稳移动。