Reduced degradation of ion-exchange membranes in electrochemical fuel cells
    1.
    发明授权
    Reduced degradation of ion-exchange membranes in electrochemical fuel cells 有权
    电化学燃料电池中离子交换膜的降解降低

    公开(公告)号:US07537857B2

    公开(公告)日:2009-05-26

    申请号:US10738962

    申请日:2003-12-17

    IPC分类号: H01M8/02 H01M4/86

    摘要: A significant problem in PEM fuel cell durability is in premature failure of the ion-exchange membrane and in particular by the degradation of the ion-exchange membrane by reactive hydrogen peroxide species. Such degradation can be reduced or eliminated by the presence of an additive in the anode, cathode or ion-exchange membrane. The additive may be a radical scavenger, a membrane cross-linker, a hydrogen peroxide decomposition catalyst and/or a hydrogen peroxide stabilizer. The presence of the additive in the membrane electrode assembly (MEA) may however result in reduced performance of the PEM fuel cell. Accordingly, it may be desirable to restrict the location of the additive to locations of increased susceptibility to membrane degradation such as the inlet and/or outlet regions of the MEA.

    摘要翻译: PEM燃料电池耐久性的一个重大问题是离子交换膜的过早失效,特别是通过活性过氧化氢物质降解离子交换膜。 通过在阳极,阴极或离子交换膜中存在添加剂可以降低或消除这种降解。 添加剂可以是自由基清除剂,膜交联剂,过氧化氢分解催化剂和/或过氧化氢稳定剂。 然而,添加剂在膜电极组件(MEA)中的存在可能导致PEM燃料电池的性能降低。 因此,可能需要将添加剂的位置限制在对膜降解的易感性增加的位置,例如MEA的入口和/或出口区域。