公开(公告)号：US20160064755A1

公开(公告)日：2016-03-03

申请号：US14888361

申请日：2014-03-17

申请人： AKTIENGESELLSCHAFT

发明人： Gerold HUBNER ,  Hannes SCHOLZ

IPC分类号： H01M8/04 ,  H01M8/10

CPC分类号： H01M8/04291 ,  H01M4/861 ,  H01M4/8636 ,  H01M4/8657 ,  H01M8/0241 ,  H01M8/1004 ,  H01M8/1016 ,  H01M8/1053 ,  H01M8/1067 ,  H01M2008/1095 ,  H01M2300/0082 ,  H01M2300/0094

摘要： A membrane electrode assembly and fuel cell having such assembly. The membrane electrode assembly has a polymer electrolyte membrane, two catalytic electrodes in contact with the polymer electrolyte membrane on both sides, namely an anode and a cathode, and two gas diffusion layers directly or indirectly adjoining the electrodes, namely an anode-side gas diffusion layer and a cathode-side gas diffusion layer. At least one of the gas diffusion layers may optionally feature a microporous layer facing the polymer electrolyte membrane. The sequence of layers is anode-side gas diffusion layer, anode-side microporous layer, anode, polymer electrolyte membrane, cathode, cathode-side microporous layer, cathode-side gas diffusion layer. A relative hydrophobicity of at least two of these components and/or a hydrophobicity gradient within at least one of these components, and a relative pore structure having pore size and/or porosity of at least two of these components and/or a gradient within the pore structure of at least one of these components, is designed in such a way that it promotes the transport of water via the polymer electrolyte membrane, preferably from the cathode side to the anode side.

摘要翻译： 具有这种组件的膜电极组件和燃料电池。 膜电极组件具有聚合物电解质膜，两侧与高分子电解质膜接触的两个催化电极，即阳极和阴极，以及直接或间接邻接电极的两个气体扩散层，即阳极侧气体扩散 层和阴极侧气体扩散层。 至少一个气体扩散层可以任选地具有面向聚合物电解质膜的微孔层。 层序是阳极侧气体扩散层，阳极侧微孔层，阳极，聚合物电解质膜，阴极，阴极侧微孔层，阴极侧气体扩散层。 这些组分中的至少两种的相对疏水性和/或这些组分中的至少一种内的疏水性梯度，以及具有至少两种这些组分的孔径和/或孔隙率的相对孔结构和/ 这些组分中的至少一种的孔结构被设计成使得其促进经由聚合物电解质膜，优选从阴极侧到阳极侧的水的输送。