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    Electrical contact element and bipolar plate
    75.
    发明授权
    Electrical contact element and bipolar plate 有权
    电接触元件和双极板

    公开(公告)号：US07968251B2

    公开(公告)日：2011-06-28

    申请号：US10689001

    申请日：2003-10-20

    申请人： Gayatri Vyas ,  Hubert A Gasteiger ,  Youssef Mikhail ,  Ilona Busenbender

    发明人： Gayatri Vyas ,  Hubert A Gasteiger ,  Youssef Mikhail ,  Ilona Busenbender

    IPC分类号： H01M4/02

    CPC分类号： C23C30/00 ,  C25B9/04 ,  C25B9/10 ,  H01M8/0204 ,  H01M8/0206 ,  H01M8/0226 ,  H01M8/0228 ,  H01M8/0232 ,  H01M8/0234 ,  H01M8/0247 ,  H01M8/1023 ,  H01M8/1039

    摘要： In one aspect a substrate such as a sheet metal product, in particular for use as a bipolar plate in a fuel cell or in an electrolyzer, is characterized in that it has, on at least one side, a conductive and corrosion-resistant protective coating of a metal oxide having a treatment which ensures the conductivity. The coating can be produced by introducing a piece of sheet metal into a coating plant and providing it with the conductive and corrosion-resistant protective coating of the metal oxide. In another aspect, an electrochemical cell such as a fuel cell comprises an electrically conductive contact element having a first surface facing an electrode for conducting electrical current, and the contact element comprises an electrically conductive substrate and an electrically conductive coating comprising a doped metal oxide, desirably a doped tin oxide, and preferably a fluorine doped tin oxide.

    摘要翻译： 在一个方面，特别是用作燃料电池或电解槽中的双极板的诸如钣金产品的衬底的特征在于，在至少一侧上具有导电和耐腐蚀保护涂层 具有确保导电性的处理的金属氧化物。 可以通过将一块金属片引入涂布设备中并为其提供金属氧化物的导电和耐腐蚀的保护涂层来制造涂层。 另一方面，诸如燃料电池的电化学电池包括导电接触元件，其具有面向用于传导电流的电极的第一表面，并且该接触元件包括导电基底和包含掺杂金属氧化物的导电涂层， 理想地是掺杂的氧化锡，优选掺杂氟化锡。

    Low-cost bipolar plate coatings for pem fuel cell
    77.
    发明申请
    Low-cost bipolar plate coatings for pem fuel cell 有权
    用于pem燃料电池的低成本双极板涂层

    公开(公告)号：US20070298309A1

    公开(公告)日：2007-12-27

    申请号：US11475676

    申请日：2006-06-27

    申请人： Gayatri Vyas ,  Upendra Rao

    发明人： Gayatri Vyas ,  Upendra Rao

    IPC分类号： H01M8/02 ,  B05D5/12

    CPC分类号： H01M8/0228 ,  H01M8/0204 ,  H01M8/0206 ,  H01M8/021 ,  H01M8/0226

    摘要： A method for depositing a hydrophilic and electrically conductive layer onto a bipolar plate substrate for a fuel cell in a one step process. The method includes mixing a solution of a conductive material, such as gold particles, and a hydrophilic material, such as silicon dioxide particles, in a suitable solvent, such as ethanol. The solution is then deposited on the bipolar plate substrate by any suitable low cost process. Once the solution dries and the ethanol has evaporated, a thin layer of the conductive and hydrophilic particles remains on the substrate. In one embodiment, the conductive particles are significantly larger than the hydrophilic particles to provide both the desirable hydrophilicity and the low contact resistance.

    摘要翻译： 一种在一步法中将亲水和导电层沉积到用于燃料电池的双极板基板上的方法。 该方法包括将诸如金颗粒的导电材料和诸如二氧化硅颗粒的亲水材料的溶液混合在合适的溶剂如乙醇中。 然后通过任何合适的低成本方法将溶液沉积在双极板基板上。 一旦溶液干燥并且乙醇已经蒸发，则导电和亲水颗粒的薄层保留在基材上。 在一个实施方案中，导电颗粒显着大于亲水性颗粒，以提供所需的亲水性和低接触电阻。

    Surface engineering of bipolar plate materials for better water management
    78.
    发明申请
    Surface engineering of bipolar plate materials for better water management 有权
    双极板材料的表面工程，以实现更好的水处理

    公开(公告)号：US20070141439A1

    公开(公告)日：2007-06-21

    申请号：US11313161

    申请日：2005-12-20

    申请人： Gayatri Vyas ,  Mahmoud Elhamid ,  Youssef Mikhail ,  Thomas Trabold

    发明人： Gayatri Vyas ,  Mahmoud Elhamid ,  Youssef Mikhail ,  Thomas Trabold

    IPC分类号： H01M8/02 ,  B05D5/12

    CPC分类号： H01M8/0204 ,  H01M8/0206 ,  H01M8/021 ,  H01M8/0213 ,  H01M8/0221 ,  H01M8/0226 ,  H01M8/0228 ,  H01M8/04291 ,  H01M2008/1095 ,  H01M2250/20 ,  Y02T90/32

    摘要： A flow field plate or bipolar plate for a fuel cell, where a surface of the flow field plate is textured or roughened to change the surface morphology of the plate. A conductive coating is deposited on the roughened surface where the roughness of the surface of the plate increases the hydrophilic nature of the coating. Therefore, if the coating is naturally hydrophobic, the surface roughness makes the coating hydrophilic to wick water away. If the coating is a conductive hydrophilic coating, then the surface roughness makes the coating super-hydrophilic, and may counter the effects of surface contamination that would act to make the hydrophilic coating less hydrophilic.

    摘要翻译： 用于燃料电池的流场板或双极板，其中流场板的表面被纹理化或粗糙化以改变板的表面形态。 导电涂层沉积在粗糙表面上，其中板的表面的粗糙度增加了涂层的亲水性。 因此，如果涂层是天然疏水性的，则表面粗糙度使得涂层具有亲水性以吸水。 如果涂层是导电亲水涂层，则表面粗糙度使得涂层具有超亲水性，并且可以抵消表面污染的作用，从而使亲水涂层的亲水性降低。

    Water management of PEM fuel cell stacks using surface active agents
    79.
    发明申请
    Water management of PEM fuel cell stacks using surface active agents 有权
    使用表面活性剂对PEM燃料电池堆进行水管理

    公开(公告)号：US20070116993A1

    公开(公告)日：2007-05-24

    申请号：US11286603

    申请日：2005-11-23

    申请人： Mahmoud Abd Elhamid ,  Gayatri Vyas ,  Youssef Mikhail

    发明人： Mahmoud Abd Elhamid ,  Gayatri Vyas ,  Youssef Mikhail

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04126 ,  H01M4/926 ,  H01M8/0258 ,  H01M8/0267 ,  H01M8/04171 ,  H01M8/241 ,  H01M2008/1095 ,  H01M2250/20 ,  Y02T90/32

    摘要： A fuel cell system that employs a surface active agent that reduces the surface tension of the water in the flow field channels. The fuel cell system includes humidifiers that humidify the cathode inlet airflow and the hydrogen anode gas. The surface active agent is mixed with the humidifying water in the humidifiers so that the surface active agent enters the flow field channels to reduce the surface tension of the water therein, thus allowing the water to wick the channels. In one non-limiting embodiment, the surface active agent is ethanol. Ruthenium can be added to the platinum in the catalyst layers of the fuel cells to mitigate the poisoning of platinum by carbon monoxide, which is one of the oxidation products of ethanol on the cathode side of the fuel cell.

    摘要翻译： 一种燃料电池系统，其采用降低流场通道中的水的表面张力的表面活性剂。 燃料电池系统包括加湿阴极入口气流和氢气阳极气体的加湿器。 将表面活性剂与加湿器中的加湿水混合，使得表面活性剂进入流场通道以降低其中的水的表面张力，从而允许水吸收通道。 在一个非限制性实施方案中，表面活性剂是乙醇。 可以将钌添加到燃料电池的催化剂层中的铂中，以减轻燃料电池阴极侧的乙醇的氧化产物之一的一氧化碳对铂的中毒。