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    Anode catalyst compositions for a voltage reversal tolerant fuel cell
    2.
    发明申请
    Anode catalyst compositions for a voltage reversal tolerant fuel cell 审中-公开
    用于耐电压逆转燃料电池的阳极催化剂组合物

    公开(公告)号：US20070037042A1

    公开(公告)日：2007-02-15

    申请号：US11504222

    申请日：2006-08-14

    申请人： Siyu Ye ,  Paul Beattie ,  Stephen Campbell ,  David Wilkinson ,  Brian Theobald ,  David Thompsett

    发明人： Siyu Ye ,  Paul Beattie ,  Stephen Campbell ,  David Wilkinson ,  Brian Theobald ,  David Thompsett

    IPC分类号： H01M4/96 ,  H01M4/90 ,  H01M4/92 ,  H01M4/88

    CPC分类号： H01M4/8807 ,  H01M4/8605 ,  H01M4/8835 ,  H01M4/9016 ,  H01M4/9083 ,  H01M4/92 ,  H01M4/921 ,  H01M8/1004

    摘要： In a solid polymer fuel cell series, various circumstances can result in a fuel cell being driven into voltage reversal. For instance, cell voltage reversal can occur if that cell receives an inadequate supply of fuel. In order to pass current, reactions other than fuel oxidation can take place at the fuel cell anode, including water electrolysis and oxidation of anode components. The latter can result in significant degradation of the anode, particularly if the anode employs a carbon black supported catalyst. Such fuel cells can be made substantially more tolerant to cell reversal by using certain anodes employing both a higher catalyst loading or coverage on a corrosion-resistant support and by incorporating, in addition to the typical electrocatalyst for promoting fuel oxidation, certain unsupported catalyst compositions to promote the water electrolysis reaction.

    摘要翻译： 在固体聚合物燃料电池系列中，各种情况可导致燃料电池被驱动进入电压反转。 例如，如果该电池接收到不足的燃料供应，则可能发生电池电压反转。 为了通过电流，燃料氧化以外的反应可以在燃料电池阳极发生，包括水电解和阳极组分的氧化。 后者可导致阳极的显着降解，特别是如果阳极采用负载炭黑的催化剂。 这样的燃料电池可以通过使用在耐腐蚀载体上使用较高催化剂负载量或覆盖率的某些阳极，并且除了用于促进燃料氧化的典型电催化剂之外，还将某些未负载的催化剂组合物掺入到 促进水电解反应。

    Method of making electrodes for electrochemical fuel cells
    4.
    发明申请
    Method of making electrodes for electrochemical fuel cells 审中-公开
    电化学燃料电池制作方法

    公开(公告)号：US20060040045A1

    公开(公告)日：2006-02-23

    申请号：US10922112

    申请日：2004-08-18

    申请人： Siegfried Limmer ,  Sabine Ansorge ,  Siyu Ye ,  Paul Beattie ,  Sonia Wong-Cheung ,  Kyoung Bai

    发明人： Siegfried Limmer ,  Sabine Ansorge ,  Siyu Ye ,  Paul Beattie ,  Sonia Wong-Cheung ,  Kyoung Bai

    IPC分类号： B05D5/12

    CPC分类号： H01M4/8828 ,  H01M4/8807 ,  H01M4/8882 ,  H01M4/8892 ,  H01M4/8896

    摘要： In preparing a fluid diffusion electrode, typical methods include applying a catalyst ink to a fluid diffusion layer, drying the catalyst ink and hot-pressing the coated fluid diffusion layer to produce a fluid diffusion electrode. In the present application, unexpected improvements in the smoothness of the resulting electrode have been observed by drying the catalyst ink during compaction. To assist with drying the catalyst layer, the compacting step may be performed at elevated temperatures. In some embodiments, a release sheet may be applied to the catalyst layer prior to compaction. In addition or alternatively, partial drying of the catalyst layer may occur prior to compaction.

    摘要翻译： 在制备流体扩散电极时，典型的方法包括将催化剂油墨施加到流体扩散层，干燥催化剂油墨和热压涂覆的流体扩散层以产生流体扩散电极。 在本申请中，通过在压实过程中干燥催化剂油墨已经观察到所得电极的平滑度的意想不到的改善。 为了帮助干燥催化剂层，压实步骤可以在升高的温度下进行。 在一些实施方案中，可以在压实之前将剥离片施加到催化剂层。 另外或替代地，催化剂层的部分干燥可以在压实之前进行。

    FUEL CELL SYSTEM
    5.
    发明申请
    FUEL CELL SYSTEM 审中-公开
    燃油电池系统

    公开(公告)号：US20090081527A1

    公开(公告)日：2009-03-26

    申请号：US11860354

    申请日：2007-09-24

    申请人： Ping He ,  Siyu Ye ,  Kyoung J. Bai

    发明人： Ping He ,  Siyu Ye ,  Kyoung J. Bai

    IPC分类号： H01M4/86

    CPC分类号： H01M8/0234 ,  H01M4/8657 ,  H01M4/92

    摘要： A membrane electrode assembly (MEA) may include an electrochemically separating sublayer disposed between the proton exchange membrane and an anode substrate. The MEA may also include a poison-scrubbing catalyst disposed between the electrochemically separating sublayer and the anode substrate. An anode electrocatalyst disposed between the proton exchange membrane and the electrochemically separating sublayer and a cathode electrocatalyst disposed between the cathode substrate and the proton exchange membrane.

    摘要翻译： 膜电极组件（MEA）可以包括设置在质子交换膜和阳极衬底之间的电化学分离子层。 MEA还可以包括设置在电化学分离子层和阳极衬底之间的毒物洗涤催化剂。 设置在质子交换膜和电化学分离子层之间的阳极电催化剂和设置在阴极衬底和质子交换膜之间的阴极电催化剂。

    FUEL CELL ANODE STRUCTURE FOR VOLTAGE REVERSAL TOLERANCE
    7.
    发明申请
    FUEL CELL ANODE STRUCTURE FOR VOLTAGE REVERSAL TOLERANCE 有权
    燃料电池阳极结构用于电压反向容差

    公开(公告)号：US20090186248A1

    公开(公告)日：2009-07-23

    申请号：US12400352

    申请日：2009-03-09

    申请人： Siyu Ye

    发明人： Siyu Ye

    IPC分类号： H01M8/10 ,  H01M4/00

    CPC分类号： H01M4/90 ,  H01M4/8636 ,  H01M4/8652 ,  H01M4/9016 ,  H01M4/9075 ,  H01M4/9083 ,  H01M4/92 ,  H01M4/921 ,  H01M4/925 ,  H01M4/926 ,  H01M8/1011 ,  H01M2008/1095 ,  Y02E60/523

    摘要： An anode catalyst layer for a fuel cell is presented having first and second catalyst compositions and a hydrophobic binder. The first catalyst composition includes a noble metal, other than Ru, on a corrosion-resistant support material; the second catalyst composition contains a single-phase solid solution of a metal oxide containing Ru. The through-plane concentration of ionomer in the catalyst layer decreases as a function of distance from the membrane interface. Gas diffusion electrodes, catalyst-coated membranes, MEAs and fuel cells having the foregoing anode catalyst layer are also described.

    摘要翻译： 提出了一种用于燃料电池的阳极催化剂层，其具有第一和第二催化剂组合物和疏水性粘合剂。 第一催化剂组合物包含除Ru之外的贵金属在耐腐蚀载体材料上; 第二催化剂组合物含有含Ru的金属氧化物的单相固溶体。 离子交联聚合物在催化剂层中的通过平面浓度随着离膜界面的距离而减小。 还描述了具有上述阳极催化剂层的气体扩散电极，催化剂涂覆膜，MEA和燃料电池。

    Reduced degradation of ion-exchange membranes in electrochemical fuel cells
    9.
    发明申请
    Reduced degradation of ion-exchange membranes in electrochemical fuel cells 有权
    电化学燃料电池中离子交换膜的降解降低

    公开(公告)号：US20050136308A1

    公开(公告)日：2005-06-23

    申请号：US10738962

    申请日：2003-12-17

    申请人： Neil Andrews ,  Shanna Knights ,  Kenneth Murray ,  Scott McDermid ,  Sean MacKinnon ,  Siyu Ye

    发明人： Neil Andrews ,  Shanna Knights ,  Kenneth Murray ,  Scott McDermid ,  Sean MacKinnon ,  Siyu Ye

    IPC分类号： H01M4/86 ,  H01M4/88 ,  H01M4/90 ,  H01M8/10 ,  C08J5/22 ,  H01M4/94

    CPC分类号： H01M8/1004 ,  H01M4/8605 ,  H01M4/8663 ,  H01M4/90 ,  H01M8/1023 ,  H01M8/1039 ,  H01M8/1051 ,  H01M8/1053 ,  H01M8/1072 ,  Y02P70/56

    摘要： A significant problem in PEM fuel cell durability is in premature failure of the ion-exchange membrane and in particular by the degradation of the ion-exchange membrane by reactive hydrogen peroxide species. Such degradation can be reduced or eliminated by the presence of an additive in the anode, cathode or ion-exchange membrane. The additive may be a radical scavenger, a membrane cross-linker, a hydrogen peroxide decomposition catalyst and/or a hydrogen peroxide stabilizer. The presence of the additive in the membrane electrode assembly (MEA) may however result in reduced performance of the PEM fuel cell. Accordingly, it may be desirable to restrict the location of the additive to locations of increased susceptibility to membrane degradation such as the inlet and/or outlet regions of the MEA.

    摘要翻译： PEM燃料电池耐久性的一个重大问题是离子交换膜的过早失效，特别是通过活性过氧化氢物质降解离子交换膜。 通过在阳极，阴极或离子交换膜中存在添加剂可以降低或消除这种降解。 添加剂可以是自由基清除剂，膜交联剂，过氧化氢分解催化剂和/或过氧化氢稳定剂。 然而，添加剂在膜电极组件（MEA）中的存在可能导致PEM燃料电池的性能降低。 因此，可能需要将添加剂的位置限制在对膜降解的易感性增加的位置，例如MEA的入口和/或出口区域。