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17 条记录 (耗时 0.022 秒)

    Active layer for membrane electrode assembly
    8.
    发明授权
    Active layer for membrane electrode assembly 失效
    膜电极组件的活性层

    公开(公告)号：US5882810A

    公开(公告)日：1999-03-16

    申请号：US813773

    申请日：1997-03-07

    申请人： Robert D. Mussell ,  Timothy J. Rehg

    发明人： Robert D. Mussell ,  Timothy J. Rehg

    IPC分类号： H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/02 ,  H01M8/04 ,  H01M8/10

    CPC分类号： H01M4/8657 ,  H01M4/8642 ,  H01M4/8668 ,  H01M4/926 ,  H01M8/1004 ,  H01M2300/0082 ,  H01M4/8605 ,  H01M8/0228 ,  H01M8/04291

    摘要： Described is a membrane electrode assembly having an ion exchange membrane, and at least two active layers positioned on the same side of the membrane; wherein the active layers containing catalytically-active particles and an ionomer; the average equivalent weights of the ionomers in the layers differ by at least 50; and the active layer positioned closest to the membrane contains the ionomer with the lower average equivalent weight. This membrane electrode assembly, when utilized in a fuel cell, provides a relatively high voltage at a given current density and gas flow rate.

    摘要翻译： 描述了具有离子交换膜和位于膜的同一侧上的至少两个活性层的膜电极组件; 其中所述活性层含有催化活性颗粒和离聚物; 层中离聚物的平均当量重量至少为50; 最靠近膜的活性层含有平均当量较低的离聚物。 当在燃料电池中使用时，该膜电极组件在给定的电流密度和气体流速下提供相对较高的电压。

    Process for preparing a membrane/electrode assembly
    9.
    发明授权
    Process for preparing a membrane/electrode assembly 失效
    制备膜/电极组件的方法

    公开(公告)号：US5702755A

    公开(公告)日：1997-12-30

    申请号：US554066

    申请日：1995-11-06

    申请人： Robert D. Mussell

    发明人： Robert D. Mussell

    IPC分类号： H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/02 ,  H01M8/04 ,  H01M8/10

    CPC分类号： H01M4/8828 ,  H01M4/8605 ,  H01M4/8882 ,  H01M4/926 ,  H01M8/1004 ,  H01M2300/0082 ,  H01M8/04291

    摘要： A composition comprising (a) catalytically-active particles, (b) an organic compound having a pKa of at least about 18 and a basicity parameter, .beta., of less than 0.66, and (c) a polymeric binder. Also described is a process for preparing a membrane/electrode assembly, which comprises the sequential steps of (i) applying a layer of the composition of the invention to a solid polymer electrolyte, a carbon fiber paper, or a release substrate; (ii) heating the composition under conditions sufficient to volatilize at least 95 percent of component (b); and (iii) positioning the composition in contact with the solid polymer electrolyte, if the composition was not applied directly to the solid polymer electrolyte, forming the membrane/electrode assembly thereby. It has been discovered that the composition and process of the invention, when used to prepare a membrane electrode assembly (MEA) having a solid polymer electrolyte, provides an MEA which provides a relatively high voltage at a given current density and gas flow rate in a fuel cell.

    摘要翻译： 一种组合物，其包含（a）催化活性颗粒，（b）具有至少约18的pKa和碱度参数β的小于0.66的有机化合物，和（c）聚合物粘合剂。 还描述了制备膜/电极组件的方法，其包括以下顺序步骤：（i）将本发明的组合物层施加到固体聚合物电解质，碳纤维纸或剥离基材上; （ii）在足以挥发至少95％的组分（b）的条件下加热组合物; 和（iii）将组合物定位为与固体聚合物电解质接触，如果该组合物没有直接施加到固体聚合物电解质上，则由此形成膜/电极组合物。 已经发现，当用于制备具有固体聚合物电解质的膜电极组件（MEA）时，本发明的组合物和方法提供了MEA，其以给定的电流密度和气体流速提供相对高的电压 燃料电池。

    Flow field assembly for electrochemical fuel cells
    10.
    发明授权
    Flow field assembly for electrochemical fuel cells 失效
    电化学燃料电池的流场组装

    公开(公告)号：US5620807A

    公开(公告)日：1997-04-15

    申请号：US522482

    申请日：1995-08-31

    申请人： Robert D. Mussell ,  Steven P. Webb ,  Carey L. Scortichini ,  Keith R. Plowman

    发明人： Robert D. Mussell ,  Steven P. Webb ,  Carey L. Scortichini ,  Keith R. Plowman

    IPC分类号： H01M4/92 ,  H01M8/10

    CPC分类号： H01M4/926 ,  H01M8/1004 ,  H01M2300/0082

    摘要： An electrochemical fuel cell having a membrane electrode assembly and a layer of an electrically conductive porous material adjacent thereto which has at least two portions with different mean pore sizes, wherein a first portion of the layer adjacent to the membrane electrode assembly has a porosity no greater than a second portion of the layer adjacent to the opposite side of the layer; the second portion has a porosity of at least about 82 percent; and the second portion has an mean pore size which is at least about 10 microns and at least ten times greater than the mean pore size of the first portion.

    摘要翻译： 一种具有膜电极组件和与其相邻的导电多孔材料层的电化学燃料电池，其具有至少两个具有不同平均孔径的部分，其中与膜电极组件相邻的层的第一部分的孔隙率不大 比层的与相对侧相邻的层的第二部分; 第二部分具有至少约82％的孔隙率; 并且第二部分具有比第一部分的平均孔径大至少约10微米且至少十倍的平均孔径。