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    Diffusion media with microporous layer
    1.
    发明申请
    Diffusion media with microporous layer 有权
    扩散介质与微孔层

    公开(公告)号：US20060046926A1

    公开(公告)日：2006-03-02

    申请号：US10925853

    申请日：2004-08-25

    申请人： Chunxin Ji ,  Jeanette O'Hara ,  Mark Mathias

    发明人： Chunxin Ji ,  Jeanette O'Hara ,  Mark Mathias

    IPC分类号： H01M4/88 ,  B05D5/12 ,  H01M4/96 ,  H01M4/94

    CPC分类号： H01M4/8657 ,  H01M4/0471 ,  H01M4/8605 ,  H01M4/8817 ,  H01M8/0234

    摘要： Specially prepared gas diffusion media improve the performance of PEM fuel cells. The media are made by first dipping an electrically conductive porous material such as carbon fiber paper into a suspension of hydrophobic polymer and drying the paper to create a desired deposition pattern of hydrophobic polymer on the substrate. Then a paste containing a fluorocarbon polymer and carbon particles is applied to a desired side of the substrate, and thereafter the paste and hydrophobic polymer are sintered together at high temperature on the paper. In particular, nonionic surfactants remain on the carbon fiber paper after the initial hydrophobic polymer is applied to the electrically conductive porous material. When the paste is coated on the dried paper, the paste is in contact with a hydrophilic surface.

    摘要翻译： 专门制备的气体扩散介质提高了PEM燃料电池的性能。 介质通过首先将诸如碳纤维纸的导电多孔材料浸渍到疏水性聚合物的悬浮液中并干燥纸以在基材上产生所需的疏水性聚合物沉积图案来制备。 然后将含有氟碳聚合物和碳颗粒的糊剂涂覆到基材的期望侧，然后将该糊状物和疏水性聚合物在高温下烧结在纸上。 特别地，在将初始疏水性聚合物施加到导电多孔材料之后，非离子表面活性剂残留在碳纤维纸上。 当糊料涂布在干燥的纸上时，糊料与亲水性表面接触。

    Diffusion media with continuous micro-porous layers incorporating non-uniformity
    3.
    发明申请
    Diffusion media with continuous micro-porous layers incorporating non-uniformity 有权
    具有不均匀性的连续微孔层的扩散介质

    公开(公告)号：US20070048593A1

    公开(公告)日：2007-03-01

    申请号：US11215395

    申请日：2005-08-30

    申请人： Steven Goebel ,  Chunxin Ji ,  Jeanette O'Hara

    发明人： Steven Goebel ,  Chunxin Ji ,  Jeanette O'Hara

    IPC分类号： H01M4/94 ,  B05D5/12 ,  H01M4/88

    CPC分类号： H01M8/023 ,  H01M8/0245 ,  H01M8/04291

    摘要： A diffusion media and micro-porous media combination for a fuel cell. A diffusion layer is composed of a diffusion media and has a first (electrode) side and an opposite second (flowfield) side, wherein at least one of the first and second sides has a geometric pattern formed therein comprising a multiplicity of mutually spaced apart regions. A micro-porous media fills the multiplicity of regions and a micro-porous layer composed of the micro-porous media is continuously applied to the first surface.

    摘要翻译： 用于燃料电池的扩散介质和微孔介质组合。 扩散层由扩散介质组成并具有第一（电极）侧和相对的第二（流场）侧，其中第一和第二侧中的至少一个具有形成在其中的几何图案，其中包括多个相互间隔开的区域 。 微孔介质填充多个区域，并且由微孔介质组成的微孔层连续地施加到第一表面。

    Control parameters for optimizing MEA performance
    5.
    发明申请
    Control parameters for optimizing MEA performance 审中-公开
    用于优化MEA性能的控制参数

    公开(公告)号：US20060204831A1

    公开(公告)日：2006-09-14

    申请号：US11434326

    申请日：2006-05-15

    申请人： Susan Yan ,  John Doyle ,  Bhaskar Sompalli ,  Hubert Gasteiger ,  Jeanette O'Hara ,  Wenbin Gu

    发明人： Susan Yan ,  John Doyle ,  Bhaskar Sompalli ,  Hubert Gasteiger ,  Jeanette O'Hara ,  Wenbin Gu

    IPC分类号： H01M4/86 ,  H01M4/96 ,  H01M4/94 ,  B05D5/12 ,  H01M4/88

    CPC分类号： H01M4/8642 ,  H01M4/0407 ,  H01M4/881 ,  H01M4/8817 ,  H01M4/8825 ,  H01M4/8828 ,  H01M4/886 ,  H01M4/8882 ,  H01M2008/1095

    摘要： A gradient of ionomeric material is generated, disposed, or otherwise provided in an electrode suitable for use in a fuel cell. The ionomer concentration, e.g., with respect to the carbon content of the catalyst layer (e.g., expressed as a ratio), is greatest in the area closest to the membrane, e.g., of the fuel cell (e.g., the membrane side), and is decreased in the area furthest from the membrane (e.g., the gas side). By way of another non-limiting example, the ionomer gradient can be formed such that the concentration (or the ratio if expressed in relation to the carbon content of the catalyst layer) can gradually, as opposed to rapidly, decrease as the distance away from the membrane increases.

    摘要翻译： 在适合用于燃料电池的电极中产生，设置或以其他方式提供离聚物材料的梯度。 离子聚合物浓度，例如相对于催化剂层的碳含量（例如，以比例表示）在最接近膜的区域（例如，燃料电池（例如，膜侧））中最大，以及 在离膜最远的区域（例如气体侧）下降。 作为另一非限制性实例，可以形成离子键梯度，使得浓度（或相对于催化剂层的碳含量表示的比例）可以逐渐减少，而不是快速地随着离开的距离而减小 膜增加。

    Spatially varying diffusion media and devices incorporating the same
    6.
    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。

    Untreated deffusion media with mesoporous layer and devices incorporating the same
    8.
    发明申请
    Untreated deffusion media with mesoporous layer and devices incorporating the same 有权
    未处理的介孔层的渗滤介质和结合其的装置

    公开(公告)号：US20060035017A1

    公开(公告)日：2006-02-16

    申请号：US11255734

    申请日：2005-10-21

    申请人： Jeanette O'Hara ,  Joerg Roth ,  Han Liu

    发明人： Jeanette O'Hara ,  Joerg Roth ,  Han Liu

    IPC分类号： B05D5/12 ,  H01M2/02

    CPC分类号： H01M8/04291 ,  H01M8/023 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0243 ,  H01M8/0245 ,  H01M8/04156 ,  H01M2250/20 ,  Y02T90/32 ,  Y10T442/2139 ,  Y10T442/2164 ,  Y10T442/2484 ,  Y10T442/2984

    摘要： A diffusion media and a process for its fabrication are provided for addressing issues related to water management in electrochemical cells and other devices employing the diffusion media. In accordance with one embodiment of the present invention, a process for fabricating a diffusion media is provided. A diffusion media substrate is provided comprising a porous fibrous matrix defining first and second major faces. The substrate comprises an amount of carbonaceous material sufficient to render the substrate electrically conductive. A mesoporous layer is applied along at least a portion of one of the first and second major faces of the substrate. The mesoporous layer is applied to the substrate by providing a coating comprising a hydrophobic component, a hydrophilic component, and a pore forming agent. The substrate is free of fluorinated polymers outside of regions of the substrate carrying the mesoporous layer. The pore forming agent is decomposed such that the mesoporous layer is more porous than the diffusion media substrate.

    摘要翻译： 提供扩散介质及其制造方法，用于解决与电化学电池和使用扩散介质的其它器件中的水管理有关的问题。 根据本发明的一个实施例，提供了制造扩散介质的方法。 提供扩散介质基底，其包括限定第一和第二主要面的多孔纤维基质。 衬底包括足以使衬底导电的一定量的碳质材料。 沿着衬底的第一和第二主面中的一个的至少一部分施加介孔层。 通过提供包含疏水组分，亲水组分和成孔剂的涂层将介孔层施加到基底上。 衬底在承载介孔层的衬底的区域之外不含氟化聚合物。 孔形成剂分解，使得介孔层比扩散介质基材多孔。