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    Preparation of patterned diffusion media
    1.
    发明申请
    Preparation of patterned diffusion media 有权
    图案扩散介质的制备

    公开(公告)号：US20050233080A1

    公开(公告)日：2005-10-20

    申请号：US10824032

    申请日：2004-04-14

    申请人： Chunxin Ji ,  Michael Schoeneweiss ,  Mark Mathias ,  Joerg Roth

    发明人： Chunxin Ji ,  Michael Schoeneweiss ,  Mark Mathias ,  Joerg Roth

    IPC分类号： B05D1/32 ,  D21H13/50 ,  D21H19/20 ,  D21H19/66 ,  D21H19/72 ,  D21H19/84 ,  H01M4/86 ,  H01M8/00 ,  H01M8/10

    CPC分类号： H01M8/0239 ,  D21H13/50 ,  D21H19/20 ,  D21H19/66 ,  D21H19/72 ,  D21H19/84 ,  H01M4/8605 ,  H01M8/0234 ,  H01M8/0245 ,  H01M8/1007

    摘要： Gas diffusion media for use in fuel cells are provided that contain a pattern of deposited hydrophobic polymer such that less than 100% of the surface of the diffusion media is covered with hydrophobic polymer. The media are made by first wetting a sheet of carbon fiber paper in an aqueous emulsion of the hydrophobic polymer. The wetted sheet is contacted with a pattern member containing one or more openings oriented to correspond to a predetermined or desired pattern of hydrophobic polymer deposition. While still in contact with the pattern member, the sheet is heated or otherwise treated to cause evaporation of the water from the sheet. Evaporation while in contact with the pattern member takes place in such a way that hydrophobic polymer is concentrated in the sheet at the openings of the pattern member by the process of evaporation.

    摘要翻译： 提供了用于燃料电池的气体扩散介质，其包含沉积的疏水性聚合物的图案，使得少于100％的扩散介质的表面被疏水聚合物覆盖。 介质通过首先在疏水性聚合物的水乳液中润湿碳纤维纸片而制成。 润湿的片材与包含一个或多个开口的图案构件接触，该开口定向成对应于预定或期望的疏水性聚合物沉积图案。 在仍然与图案构件接触的同时，片材被加热或以其他方式处理以引起水从片材的蒸发。 在与图案构件接触的同时进行蒸发，其方式是通过蒸发过程将疏水性聚合物集中在图案构件的开口处的片材中。

    Diffusion media, fuel cells, and fuel cell powered systems
    3.
    发明授权
    Diffusion media, fuel cells, and fuel cell powered systems 有权
    扩散介质，燃料电池和燃料电池供电系统

    公开(公告)号：US07303835B2

    公开(公告)日：2007-12-04

    申请号：US10685346

    申请日：2003-10-14

    申请人： Mark F. Mathias ,  Joerg Roth ,  Bhaskar Sompalli ,  Michael Schoeneweiss ,  David Wood

    发明人： Mark F. Mathias ,  Joerg Roth ,  Bhaskar Sompalli ,  Michael Schoeneweiss ,  David Wood

    IPC分类号： H01M4/00 ,  H01M8/10 ,  H01M2/14

    CPC分类号： H01M8/0234 ,  H01M4/8605 ,  H01M8/1007

    摘要： A porous diffusion media according to the present invention is positioned against a catalyst layer of the membrane electrode assembly, the porous matrix comprises carbon paper, and the water transfer particles comprise carbon fibers or powders. Relatively high and relatively low water transfer particle density regions alternate across the porous diffusion media. A first major face of the media may be collectively more hydrophilic than the second major face and the second major face may be collectively more hydrophobic than the first major face. The diffusion media is positioned against the catalyst layer along the first major face of the diffusion media and against a flow field of the fuel cell along the second major face of the diffusion media. The porous diffusion media comprises hydrophobic material disposed along the second major face of the diffusion media.

    摘要翻译： 根据本发明的多孔扩散介质位于膜电极组件的催化剂层上，多孔基质包括碳纸，并且水转移颗粒包含碳纤维或粉末。 相对高且相对较低的水转移颗粒密度区域跨多孔扩散介质交替。 介质的第一主面可以集中地比第二主面更亲水，而第二主面可以集体地比第一主面更疏水。 扩散介质沿着扩散介质的第一主面靠着催化剂层定位，并且沿着扩散介质的第二主面对着燃料电池的流场。 多孔扩散介质包括沿扩散介质的第二主面设置的疏水材料。

    Spatially varying diffusion media and devices incorporating the same
    4.
    发明申请
    Spatially varying diffusion media and devices incorporating the same 有权
    空间变化的扩散介质和结合其的装置

    公开(公告)号：US20050026018A1

    公开(公告)日：2005-02-03

    申请号：US10628318

    申请日：2003-07-28

    申请人： Jeanette O'Hara ,  Thomas Trabold ,  Michael Schoeneweiss ,  Joerg Roth

    发明人： Jeanette O'Hara ,  Thomas Trabold ,  Michael Schoeneweiss ,  Joerg Roth

    IPC分类号： H01M8/02 ,  H01M8/04 ,  H01M2/00 ,  H01M2/02 ,  H01M2/14 ,  H01M8/00 ,  H01M8/18

    CPC分类号： H01M8/0245 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0241 ,  H01M8/04119 ,  H01M8/04291

    摘要： A diffusion media and a scheme for spatially varying the parameters of the diffusion media to address issues related to water management in electrochemical cells and other devices employing the diffusion media are provided. A device is configured to convert a hydrogenous fuel source to electrical energy and comprises an electrochemical conversion assembly, first and second reactant inputs, first and second product outputs, and first and second diffusion media. The device is configured such that a mesoporous layer is carried along at least a portion of a major face of one of the first and second diffusion media substrates. The mesoporous layer comprises a hydrophilic carbonaceous component and a hydrophobic component. The mesoporous layer occupies a substantially greater portion of one of the high or low H2O regions of the device, relative to the other of the high or low H2O region of the device.

    摘要翻译： 提供扩散介质和用于空间变化扩散介质的参数以解决与使用扩散介质的电化学电池中的水管理有关的问题的方案。 一种装置被配置为将氢燃料源转换成电能并且包括电化学转化组件，第一和第二反应物输入，第一和第二产物输出以及第一和第二扩散介质。 该器件被配置成使得介孔层沿着第一和第二扩散介质衬底之一的主面的至少一部分被携带。 介孔层包含亲水性碳质组分和疏水组分。 介孔层相对于器件的高或低H 2 O区域中的另一个占据器件的高或低H 2 O区域中的一个的大部分。