公开(公告)号：US07592092B2

公开(公告)日：2009-09-22

申请号：US10562970

申请日：2004-11-24

申请人： Sozaburo Ohashi

发明人： Sozaburo Ohashi

IPC分类号： H01M4/90

CPC分类号： H01M4/8636 ,  H01M4/8605 ,  H01M4/861 ,  H01M4/8814 ,  H01M4/8828 ,  H01M4/8882 ,  H01M4/8896 ,  H01M4/926 ,  H01M8/1004

摘要： In a membrane electrode assembly 1 of a fuel cell, the porosity of a hydrogen electrode-side catalyst layer 11a is made to be lower than that of an air electrode-side catalyst layer 11b. Specifically, the weight ratio of ion-exchange resin to carbon carriers of the hydrogen electrode-side catalyst layer is made to be larger than such ratio of the air electrode-side catalyst layer, the hydrogen electrode-side catalyst layer is allowed to contain an additive having a certain particle diameter or less, or the hydrogen electrode-side catalyst layer is formed by spraying a catalyst ink and the air electrode-side catalyst layer is formed by a transfer method. According to the present invention, the amount of hydrogen that permeates from the hydrogen electrode-side catalyst layer to the air electrode-side catalyst layer via an electrolyte membrane is reduced to suppress a direct hydrogen combustion reaction in the air electrode-side catalyst layer, thereby improving the fuel cell durability.

摘要翻译： 在燃料电池的膜电极组件1中，使氢电极侧催化剂层11a的空隙率比空气电极侧催化剂层11b的孔隙率低。 具体地说，使氢电极侧催化剂层的离子交换树脂与碳载体的重量比大于空气电极侧催化剂层的比例，允许氢电极侧催化剂层含有 通过喷射催化剂油墨形成氢电极侧催化剂层，通过转印法形成空气电极侧催化剂层，形成一定的粒径以下的添加剂。 根据本发明，通过电解质膜从氢电极侧催化剂层向空气电极侧催化剂层渗透的氢的量减少，以抑制空气电极侧催化剂层中的直接氢燃烧反应， 从而提高燃料电池耐久性。