利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

26 条记录 (耗时 0.025 秒)

    Mitigation of membrane degradation by multilayer electrode
    8.
    发明授权
    Mitigation of membrane degradation by multilayer electrode 有权
    通过多层电极减少膜降解

    公开(公告)号：US08206872B2

    公开(公告)日：2012-06-26

    申请号：US11828895

    申请日：2007-07-26

    申请人： Annette M. Brenner ,  Hubert A. Gasteiger ,  Wenbin Gu ,  James Leistra ,  Brian A. Litteer ,  Han Liu ,  Susan G. Yan ,  Jingxin Zhang

    发明人： Annette M. Brenner ,  Hubert A. Gasteiger ,  Wenbin Gu ,  James Leistra ,  Brian A. Litteer ,  Han Liu ,  Susan G. Yan ,  Jingxin Zhang

    IPC分类号： H01M8/10

    CPC分类号： H01M4/8657 ,  H01M4/8605 ,  H01M4/8642 ,  H01M8/04197 ,  H01M8/1004 ,  H01M2250/20 ,  H01M2300/0082 ,  Y02E60/521 ,  Y02T90/32

    摘要： An MEA for a fuel cell that employs multiple catalyst layers to reduce the hydrogen and/or oxygen partial pressure at the membrane so as to reduce the fluoride release rate from the membrane and reduce membrane degradation. An anode side multi-layer catalyst configuration is positioned at the anode side of the MEA membrane. The anode side multi-layer catalyst configuration includes an anode side under layer positioned against the membrane and including a catalyst, an anode side middle layer positioned against the anode side under layer and not including a catalyst and an anode side catalyst layer positioned against the anode side middle layer and opposite to the anode side under layer and including a catalyst, where the amount of catalyst in the anode side catalyst layer is greater than the amount of catalyst in the anode side under layer.

    摘要翻译： 一种用于燃料电池的MEA，其采用多个催化剂层以降低膜上的氢和/或氧分压，从而降低氟离子的释放速率并降低膜的降解。 阳极侧多层催化剂配置位于MEA膜的阳极侧。 阳极侧多层催化剂构造包括：阳极侧下层，其位于膜的外部并且包括催化剂，阳极侧中间层，其位于阳极侧下层且不包括催化剂;以及阳极侧催化剂层，其位于阳极 并且包括催化剂，其中阳极侧催化剂层中的催化剂的量大于阳极侧下层的催化剂的量。

    SHUTDOWN OPERATIONS FOR AN UNSEALED CATHODE FUEL CELL SYSTEM
    9.
    发明申请
    SHUTDOWN OPERATIONS FOR AN UNSEALED CATHODE FUEL CELL SYSTEM 审中-公开
    用于无负载CATHODE燃料电池系统的关闭操作

    公开(公告)号：US20090263679A1

    公开(公告)日：2009-10-22

    申请号：US12103939

    申请日：2008-04-16

    申请人： Gary M. Robb ,  Hubert A. Gasteiger ,  Balasubramanian Lakshmanan ,  Paul Taichiang Yu ,  Steven G. Goebel ,  Frederick T. Wagner

    发明人： Gary M. Robb ,  Hubert A. Gasteiger ,  Balasubramanian Lakshmanan ,  Paul Taichiang Yu ,  Steven G. Goebel ,  Frederick T. Wagner

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04231 ,  H01M8/04559 ,  H01M8/04955

    摘要： Processes to shut down a fuel cell system are described. In one implementation (300), a load (215) is cyclically engaged and disengaged across a fuel cell stack (205) so as to deplete the fuel available to the system's fuel cells (205). Voltage and/or current thresholds may be used to determine when to engage and disengage the load (215) and when to terminate the shutdown operation. In another implementation (500), a variable load (405) is engaged and adjusted so as to deplete the fuel available to the system's fuel cells (205). As before, voltage and/or current thresholds may be used to determine when to adjust the load (405) and when to terminate the shutdown process. In still another implementation, a load (215 or 405) may be periodically engaged and disengaged during some portion of the shutdown process and engaged but adjusted during other portions of the shutdown process.

    摘要翻译： 描述关闭燃料电池系统的过程。 在一个实施方案（300）中，负载（215）在燃料电池堆（205）周期性地接合和分离，从而消耗可用于系统燃料电池（205）的燃料。 可以使用电压和/或电流阈值来确定何时接合和解除负载（215）以及何时终止关机操作。 在另一实施方案（500）中，接合和调节可变负载（405）以便耗尽系统燃料电池（205）可用的燃料。 如前所述，可以使用电压和/或电流阈值来确定何时调整负载（405）以及何时终止关机过程。 在另一个实施方案中，在关闭过程的某些部分期间，负载（215或405）可以周期性地接合和分离，并且在关闭过程的其他部分期间被接合但被调整。