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    Membrane electrode assembly for use in electrochemical devices
    1.
    发明授权
    Membrane electrode assembly for use in electrochemical devices 有权
    用于电化学装置的膜电极组件

    公开(公告)号：US08394551B2

    公开(公告)日：2013-03-12

    申请号：US10564794

    申请日：2004-07-14

    申请人： Ralf Zuber ,  Sandra Wittpahl ,  Klaus Schaack ,  Holger Dziallas ,  Peter Seipel ,  Günther Vulpius ,  Bernd Dillmann

    发明人： Ralf Zuber ,  Sandra Wittpahl ,  Klaus Schaack ,  Holger Dziallas ,  Peter Seipel ,  Günther Vulpius ,  Bernd Dillmann

    IPC分类号： H01M8/00

    CPC分类号： H01M8/1004 ,  C25B9/10 ,  H01M4/8626 ,  H01M4/8896 ,  H01M8/0247 ,  Y02E60/366 ,  Y02E60/523

    摘要： The invention relates to a membrane-electrode assembly (MEA) for electrochemical devices, in particular for membrane fuel cells. The membrane-electrode assembly has a semi-coextensive design and comprises an ion-conducting membrane, two catalyst layers and gas diffusion layers of differing sizes on the front side and rear side. The first gas diffusion layer has smaller planar dimensions than the ion-conducting membrane, while the second gas diffusion layer has essentially the same planar dimensions as the ion-conducting membrane. As a result, the ion-conducting membrane has a surface which is not supported by a gas diffusion layer on the front side.The membrane-electrode assembly has, owing to the particular construction, a stable structure which can be handled readily and displays advantages in the sealing of the reactive gases from one another and also in terms of the electrical properties. In particular, the hydrogen penetration current is significantly reduced.New processes for producing the MEA of the invention are described, in particular the method of heat pulse welding.The membrane-electrode assembly is used in PEM fuel cells, direct methanol fuel cells, electrolysers and other electrochemical devices.

    摘要翻译： 本发明涉及用于电化学装置的膜 - 电极组件（MEA），特别是用于膜式燃料电池。 膜 - 电极组件具有半共扩展设计，并且包括在前侧和后侧上具有不同尺寸的离子传导膜，两个催化剂层和气体扩散层。 第一气体扩散层具有比离子传导膜更小的平面尺寸，而第二气体扩散层具有与离子传导膜基本相同的平面尺寸。 结果，离子传导膜具有不在前侧的气体扩散层支撑的表面。 由于特殊的结构，膜 - 电极组件具有可以容易地处理的稳定的结构，并且在反应气体彼此密封以及电性能方面显示出优点。 特别地，氢穿透电流显着降低。 对本发明的MEA的制造新工艺进行了详细描述，特别是热脉冲焊接方法。 膜电极组件用于PEM燃料电池，直接甲醇燃料电池，电解槽和其他电化学装置。

    Catalyst-coated ionomer membrane with protective film layer and membrane-electrode-assembly made thereof
    2.
    发明授权
    Catalyst-coated ionomer membrane with protective film layer and membrane-electrode-assembly made thereof 有权
    具有保护膜层的催化剂涂覆的离聚物膜和由其制成的膜 - 电极组件

    公开(公告)号：US08021796B2

    公开(公告)日：2011-09-20

    申请号：US10668559

    申请日：2003-09-22

    申请人： Ralf Zuber ,  Klaus Schaack ,  Sandra Wittpahl ,  Alexander Kabza ,  Markus Maier

    发明人： Ralf Zuber ,  Klaus Schaack ,  Sandra Wittpahl ,  Alexander Kabza ,  Markus Maier

    IPC分类号： H01M2/14 ,  H01M2/08 ,  H01M8/10 ,  H01M4/88 ,  B05D5/12

    CPC分类号： H01M8/0273 ,  H01M8/1004 ,  H01M8/242 ,  H01M2008/1095 ,  H01M2300/0082 ,  Y02E60/523 ,  Y02P70/56

    摘要： The present invention relates to the field of electrochemical cells and fuel cells, and more specifically to polymer-electrolyte-membrane fuel cells (PEMFC) and direct methanol fuel cells (DMFC). It is directed to catalyst-coated ionomer membranes (“CCMs”) and membrane-electrode-assemblies (“MEAs”) that contain one or more protective film layers for protection, sealing and better handling purposes. The one or more protective film layers are attached to the surface of said catalyst-coated membranes in such a way that they overlap with a region of the passive non-coated ionomer area, and with a region of the active area that is coated with a catalyst layer. Furthermore, the present invention discloses a process for manufacture of CCMs and MEAs that contain protective film layers. The materials may be used as components for the manufacture of low temperature fuel cell stacks.

    摘要翻译： 本发明涉及电化学电池和燃料电池领域，更具体地涉及聚合物 - 电解质膜燃料电池（PEMFC）和直接甲醇燃料电池（DMFC）。 它涉及含有一个或多个保护膜层的催化剂涂覆的离聚物膜（“CCM”）和膜电极组件（“MEA”），用于保护，密封和更好的处理目的。 一个或多个保护膜层以这样的方式附着在所述催化剂涂覆的膜的表面上，使得它们与被动未涂覆的离子交联聚合物区域的区域重叠，并且与涂覆有活性区域的区域 催化剂层。 此外，本发明公开了一种制造含有保护膜层的CCM和MEA的方法。 这些材料可以用作制造低温燃料电池堆的部件。

    Membrane Electrode Unit
    3.
    发明申请
    Membrane Electrode Unit 审中-公开
    膜电极单元

    公开(公告)号：US20070202388A1

    公开(公告)日：2007-08-30

    申请号：US10591565

    申请日：2005-03-03

    申请人： Joachim Koehler ,  Markus Gelz ,  Ralf Zuber

    发明人： Joachim Koehler ,  Markus Gelz ,  Ralf Zuber

    IPC分类号： H01M4/94 ,  H01M8/10

    CPC分类号： H01M8/1004 ,  H01M8/04119 ,  H01M8/04291 ,  H01M2300/0082

    摘要： The invention relates to membrane electrode units (MEUs) for membrane fuel cells. The products contain different gas diffusion layers on the anode side and on the cathode side. The amount of the water repellant agent (WRA) in the anode gas diffusion layer is identical or higher than the amount of water repellant agent in the cathode gas diffusion layer and is in the range of 20 to 35% by weight (based on total weight of the gas diffusion layer). At the same time, the total pore volume V of the cathode gas diffusion layer is higher than the total pore volume of the anode gas diffusion layer (Vcathode>VAnode). The membrane electrode units as well as the PEM stacks made therewith show improved performance when operated with unhumidified operating gases (such as dry hydrogen, reformate gas, oxygen or air).

    摘要翻译： 本发明涉及膜燃料电池的膜电极单元（MEU）。 该产品在阳极侧和阴极侧含有不同的气体扩散层。 阳极气体扩散层中的防水剂（WRA）的量与阴极气体扩散层中的防水剂的量相同或更高，为20〜35重量％（以总重量计） 的气体扩散层）。 同时，阴极气体扩散层的总孔体积V高于阳极气体扩散层（V阴极 V阳极）的总孔体积， 。 当用不加湿的操作气体（例如干燥氢气，重整气体，氧气或空气）操作时，膜电极单元以及由其制成的PEM堆叠显示出改善的性能。

    Gas diffusion electrode for membrane fuel cells and method of its production
    5.
    发明授权
    Gas diffusion electrode for membrane fuel cells and method of its production 失效
    膜燃料电池用气体扩散电极及其制造方法

    公开(公告)号：US5861222A

    公开(公告)日：1999-01-19

    申请号：US822864

    申请日：1997-03-24

    申请人： Andreas Fischer ,  Hartmut Wendt ,  Ralf Zuber

    发明人： Andreas Fischer ,  Hartmut Wendt ,  Ralf Zuber

    IPC分类号： H01M4/86 ,  H01M4/92 ,  H01M8/1004

    CPC分类号： H01M4/928 ,  H01M4/86 ,  H01M4/926 ,  H01M8/1004 ,  H01M2300/0082 ,  H01M4/921 ,  Y02P70/56

    摘要： A porous gas diffusion electrode for membrane fuel cells on an ion-conducting polymer. The electrode contains a finely divided electrocatalyst which is dispersed in a proton-conducting ionomer and has a total porosity of more than 40 to less than 75%. It supplies considerably improved performance data in comparison to known electrodes. The electrode can be produced by using pore-forming materials which are dissolved during the re-protonation of the ion-conducting polymers with sulfuric acid or are decomposed by the action of temperature.

    摘要翻译： 用于离子导电聚合物上的膜燃料电池的多孔气体扩散电极。 电极含有细分散的电催化剂，其分散在质子传导离聚物中，总孔隙率大于40至小于75％。 与已知电极相比，它提供了显着改进的性能数据。 可以通过使用在离子导电聚合物与硫酸重质子化过程中溶解的成孔材料或通过温度分解来分解电极来制造电极。

    Membrane Electrode Assembly for Use in Electochmical Devices
    9.
    发明申请
    Membrane Electrode Assembly for Use in Electochmical Devices 有权
    用于电子设备的膜电极组件

    公开(公告)号：US20070215461A1

    公开(公告)日：2007-09-20

    申请号：US10564794

    申请日：2004-07-14

    申请人： Ralf Zuber ,  Sandra Wittpahl ,  Klaus Schaack ,  Holger Dziallas ,  Peter Seipel ,  Gunther Vulpius ,  Bernd Dillmann

    发明人： Ralf Zuber ,  Sandra Wittpahl ,  Klaus Schaack ,  Holger Dziallas ,  Peter Seipel ,  Gunther Vulpius ,  Bernd Dillmann

    IPC分类号： C25C7/02

    CPC分类号： H01M8/1004 ,  C25B9/10 ,  H01M4/8626 ,  H01M4/8896 ,  H01M8/0247 ,  Y02E60/366 ,  Y02E60/523

    摘要： The invention relates to a membrane-electrode assembly (MEA) for electrochemical devices, in particular for membrane fuel cells. The membrane-electrode assembly has a semi-coextensive design and comprises an ion-conducting membrane, two catalyst layers and gas diffusion layers of differing sizes on the front side and rear side. The first gas diffusion layer has smaller planar dimensions than the ion-conducting membrane, while the second gas diffusion layer has essentially the same planar dimensions as the ion-conducting membrane. As a result, the ion-conducting membrane has a surface which is not supported by a gas diffusion layer on the front side. The membrane-electrode assembly has, owing to the particular construction, a stable structure which can be handled readily and displays advantages in the sealing of the reactive gases from one another and also in terms of the electrical properties. In particular, the hydrogen penetration current is significantly reduced. New processes for producing the MEA of the invention are described, in particular the method of heat pulse welding. The membrane-electrode assembly is used in PEM fuel cells, direct methanol fuel cells, electrolysers and other electrochemical devices.

    摘要翻译： 本发明涉及用于电化学装置的膜 - 电极组件（MEA），特别是用于膜式燃料电池。 膜 - 电极组件具有半共扩展设计，并且包括在前侧和后侧上具有不同尺寸的离子传导膜，两个催化剂层和气体扩散层。 第一气体扩散层具有比离子传导膜更小的平面尺寸，而第二气体扩散层具有与离子传导膜基本相同的平面尺寸。 结果，离子传导膜具有不在前侧的气体扩散层支撑的表面。 由于特殊的结构，膜 - 电极组件具有可以容易地处理的稳定的结构，并且在反应气体彼此密封以及电性能方面显示出优点。 特别地，氢穿透电流显着降低。 对本发明的MEA的制造新工艺进行了详细描述，特别是热脉冲焊接方法。 膜电极组件用于PEM燃料电池，直接甲醇燃料电池，电解槽和其他电化学装置。

    Gas diffusion structures and gas diffusion electrodes for polymer electrolyte fuel cells
    10.
    发明授权
    Gas diffusion structures and gas diffusion electrodes for polymer electrolyte fuel cells 失效
    用于聚合物电解质燃料电池的气体扩散结构和气体扩散电极

    公开(公告)号：US06803143B2

    公开(公告)日：2004-10-12

    申请号：US09844677

    申请日：2001-04-30

    申请人： Ralf Zuber ,  Armin Bayer ,  Knut Fehl ,  Volker Bänisch ,  Thomas Lehmann

    发明人： Ralf Zuber ,  Armin Bayer ,  Knut Fehl ,  Volker Bänisch ,  Thomas Lehmann

    IPC分类号： H01M486

    CPC分类号： H01M4/96 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0245 ,  H01M8/1004 ,  H01M8/1007 ,  H01M2300/0082 ,  Y02P70/56

    摘要： A gas diffusion structure for polymer electrolyte fuel cells having a sheet-like carbon substrate made hydrophobic and having two main opposing surfaces and a contact layer on one of these surfaces. The contact layer is formed of an intimate mixture of at least one hydrophobic polymer, which can be polyethylene, polypropylene or polytetrafluoroethylene, and finely divided carbon particles, wherein the weight percentage of the carbon particles relative to the total weight of the contact layer amounts to 40 to 90 wt. %. The gas diffusion structure is a carbon substrate made hydrophobic by at least one hydrophobic polymer and the hydrophobic polymers are restricted to two layers extending from both opposing surfaces into the carbon substrate down to a depth of from 5 to 40 &mgr;m and the hydrophobic polymers fill of from 20 to 60% of the pore volume within those layers.

    摘要翻译： 一种用于聚合物电解质燃料电池的气体扩散结构，其具有疏水性并具有两个主要相对表面的片状碳基底和在这些表面之一上的接触层。 接触层由至少一种疏水性聚合物（其可以是聚乙烯，聚丙烯或聚四氟乙烯）和细碎的碳颗粒的紧密混合物形成，其中碳颗粒相对于接触层的总重量的重量百分比等于 40〜90重量％ ％。 气体扩散结构是通过至少一种疏水性聚合物疏水化的碳底物，并且疏水性聚合物被限制为从两个相对表面延伸到碳衬底中的深度为5至40μm的两层，疏水性聚合物填充 在这些层内的孔体积的20至60％。