Gasketed membrane electrode assembly for electrochemical fuel cells
    4.
    发明授权
    Gasketed membrane electrode assembly for electrochemical fuel cells 失效
    用于电化学燃料电池的垫片膜电极组件

    公开(公告)号:US5464700A

    公开(公告)日:1995-11-07

    申请号:US225519

    申请日:1994-04-11

    IPC分类号: C25B9/00 H01M8/02 H01M8/10

    摘要: A gasketed membrane electrode assembly for electrochemical fuel cells employs gasketing material at the periphery of the ion exchange membrane, rather than the membrane itself, as a gasket. The gasketing material may be formed from an elastomeric material suitable for cold bonding or bonding by heat and pressure. A nonhydrophilic thermoplastic elastomer is the preferred gasketing material. The gasketed membrane electrode assembly provides a seal between the electrically conductive separator plates that is more effective and economical than assemblies employing the membrane itself as the gasketing material. In an alternative embodiment, a gasketed membrane assembly for use in the humidification portion of a fuel cell employs gasketing material at the periphery of a water permeable membrane.

    摘要翻译: 用于电化学燃料电池的垫圈膜电极组件在离子交换膜的周边采用衬垫材料,而不是膜本身作为衬垫。 衬垫材料可以由适合于通过热和压力进行冷粘合或粘合的弹性体材料形成。 非亲水性热塑性弹性体是优选的衬垫材料。 垫圈膜电极组件提供了导电隔板之间的密封,其比使用膜本身作为衬垫材料的组件更有效和经济。 在替代实施例中,用于燃料电池的加湿部分的垫圈膜组件在透水膜的周边采用衬垫材料。

    Graft polymeric membranes and ion-exchange membranes formed therefrom
    10.
    发明授权
    Graft polymeric membranes and ion-exchange membranes formed therefrom 失效
    由其形成的接枝聚合物膜和离子交换膜

    公开(公告)号:US06359019B1

    公开(公告)日:2002-03-19

    申请号:US08967960

    申请日:1997-11-12

    IPC分类号: C08J522

    摘要: Graft polymeric membranes in which one or more trifluorovinyl aromatic monomers are radiation graft polymerized to a preformed polymeric base film are provided, as well as ion-exchange membranes prepared therefrom. Preferred monomers include substituted &agr;, &bgr;, &bgr;-trifluorostyrenes and trifluorovinyl naphthalenes which are activated towards the grafting reaction or facilitate the introduction of more than one ion-exchange group per monomer unit in the grafted chains. The ion-exchange membranes are useful in dialysis applications, and particularly in electrochemical applications, for example as membrane electrolytes in electrochemical fuel cells and electrolyzers.

    摘要翻译: 提供其中一个或多个三氟乙烯基芳族单体被辐射接枝聚合成预制的聚合物基膜的接枝聚合物膜以及由其制备的离子交换膜。 优选的单体包括被取代的α,β,β-三氟苯乙烯和三氟乙烯基萘,其被接触反应活化或促进每个单体单元在接枝链中引入多于一个离子交换基团。 离子交换膜可用于透析应用,特别是在电化学应用中,例如作为电化学燃料电池和电解器中的膜电解质。