利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

8 条记录 (耗时 0.025 秒)

    Method of reducing fuel cell performance degradation of an electrode comprising porous components
    2.
    发明授权
    Method of reducing fuel cell performance degradation of an electrode comprising porous components 失效
    降低包含多孔组分的电极的燃料电池性能降低的方法

    公开(公告)号：US06306536B1

    公开(公告)日：2001-10-23

    申请号：US09280147

    申请日：1999-03-26

    申请人： David P. Wilkinson ,  Jean St.-Pierre ,  Joy A. Roberts ,  Stephen A. Campbell

    发明人： David P. Wilkinson ,  Jean St.-Pierre ,  Joy A. Roberts ,  Stephen A. Campbell

    IPC分类号： H01M810

    CPC分类号： H01M4/8892 ,  H01M4/8605 ,  H01M4/8807 ,  H01M4/9083 ,  H01M8/04253

    摘要： An improved method reduces fuel cell performance degradation of an electrode comprising porous components. Electrochemical solid polymer electrolyte fuel cells typically have present therein a liquid which expands upon freezing, such as, for example water. The presence of such a liquid within the pores of the electrode components may cause performance degradation of the liquid freezes. The present method comprises employing an impregnant within at least some of the pores of the electrode components. The impregnant inhibits the deterioration of porous fuel cell components caused by expansion of the liquid within the pores when the fuel cell components are subjected to a temperature below the freezing temperature of the liquid. Preferably the impregnant does not expand when changing phases from a liquid to a solid. The impregnant may comprise an organic fluid, an organic acid, an inorganic acid, a polymer or dispersion.

    摘要翻译： 改进的方法降低了包含多孔组分的电极的燃料电池性能降低。 电化学固体聚合物电解质燃料电池通常在其中存在冷冻时膨胀的液体，例如水。 这种液体在电极组件的孔内的存在可能导致液体的性能降低。 本方法包括在电极组分的至少一些孔内使用浸渍剂。 当燃料电池组件经受低于液体冷冻温度的温度时，浸渍剂抑制由孔内的液体膨胀引起的多孔燃料电池组分的劣化。 优选地，当将液相变成固体时，浸渍剂不膨胀。 浸渍剂可以包含有机流体，有机酸，无机酸，聚合物或分散体。

    Method and apparatus for controlling the temperature within an electrochemical fuel cell
    4.
    发明授权
    Method and apparatus for controlling the temperature within an electrochemical fuel cell 失效
    用于控制电化学燃料电池内的温度的方法和装置

    公开(公告)号：US06682839B2

    公开(公告)日：2004-01-27

    申请号：US09848531

    申请日：2001-05-03

    申请人： David P. Wilkinson ,  Bien Hung Chiem ,  Joy A. Roberts ,  Jean St-Pierre ,  Jürgen Stumper ,  Joerg Zimmermann

    发明人： David P. Wilkinson ,  Bien Hung Chiem ,  Joy A. Roberts ,  Jean St-Pierre ,  Jürgen Stumper ,  Joerg Zimmermann

    IPC分类号： H01M804

    CPC分类号： H01M8/04029 ,  H01M8/0202 ,  H01M8/04097 ,  H01M8/04119 ,  H01M8/04156 ,  H01M2300/0082

    摘要： A method of controlling the temperature within an electrochemical fuel cell stack comprises introducing a reactant fluid stream comprising both a heat transfer liquid and a reactant into a fuel cell assembly such that the reactant fluid stream contacts an electrode. The heat transfer liquid is other than water. Preferably, the method further comprises recirculating heat transfer liquid which is in the reactant exhaust stream, typically via a heat exchanger, and re-introducing it into the fuel cell assembly in the reactant fluid stream. The recirculated heat transfer liquid may be directed to a reservoir which in turn supplies heat transfer liquid to the reactant fluid stream as it is needed. In a further embodiment, the method may comprise using the heat transfer liquid to heat a fuel cell stack to a desired operating temperature rather than cooling the stack.

    摘要翻译： 控制电化学燃料电池堆内的温度的方法包括将包含传热液体和反应物的反应物流体流引入燃料电池组件，使得反应物流体流接触电极。 传热液体不是水。 优选地，该方法还包括通常通过热交换器再循环在反应物排气流中的传热液体，并将其重新引入到反应物流体流中的燃料电池组件中。 再循环的传热液体可以被引导到储存器，储存器又根据需要将热传递液体提供给反应物流体流。 在另一个实施例中，该方法可以包括使用传热液体将燃料电池堆加热到期望的操作温度，而不是冷却堆叠。

    Impregnation of microporous electrocatalyst particles for improving performance in an electrochemical fuel cell
    6.
    发明授权
    Impregnation of microporous electrocatalyst particles for improving performance in an electrochemical fuel cell 失效
    用于改善电化学燃料电池性能的微孔电催化剂颗粒的浸渍

    公开(公告)号：US06610432B1

    公开(公告)日：2003-08-26

    申请号：US09623254

    申请日：2000-11-21

    申请人： David P. Wilkinson ,  Stephen A. Campbell ,  Joy A. Roberts

    发明人： David P. Wilkinson ,  Stephen A. Campbell ,  Joy A. Roberts

    IPC分类号： H01M810

    CPC分类号： H01M8/1004 ,  H01M4/8605 ,  H01M4/8892 ,  H01M4/90 ,  H01M4/9083 ,  H01M4/926 ,  H01M2300/0082

    摘要： A method is provided for treating electrocatalyst particles and using the treated electrocatalyst for improving performance in an electrochemical fuel cell. The treatment method comprises impregnating pores of the electrocatalyst particles with an impregnant wherein the pores comprise micropores which have an aperture size less than 0.1 micron. The impregnant is preferably ion-conducting and may comprise an organic acid, an inorganic acid, or a polymer. Alternatively, or in addition, the impregnant has an oxygen permeability greater than that of water. The method of impregnating the electrocatalyst particles preferably comprises the steps of contacting the electrocatalyst particles with an impregnant and subjecting the electrocatalyst particles to a vacuum and/or an elevated pressure above atmospheric pressure. The treated electrocatalyst particles are incorporated into an electrochemical fuel cell. The impregnant improves the mass transport properties for the movement of reactants and reaction products within the micropores of the electrocatalyst particles, thereby improving electrocatalyst utilization and electrochemical fuel cell performance for a fixed amount of electrocatalyst.

    摘要翻译： 提供了一种处理电催化剂颗粒并使用经处理的电催化剂改善电化学燃料电池性能的方法。 处理方法包括用浸渍剂浸渍电催化剂颗粒的孔，其中孔包括孔径小于0.1微米的微孔。 浸渍剂优选是离子导电的，并且可以包含有机酸，无机酸或聚合物。 或者，或者另外，浸渍剂的氧气渗透性大于水。 浸渍电催化剂颗粒的方法优选包括使电催化剂颗粒与浸渍剂接触并使电催化剂颗粒经受高于大气压的真空和/或高压的步骤。 将经处理的电催化剂颗粒结合到电化学燃料电池中。 浸渍剂改善了电催化剂颗粒微孔内反应物和反应产物运动的质量传递性能，从而提高了固定量的电催化剂的电催化剂利用率和电化学燃料电池性能。

    COOLING SUBSYSTEM FOR AN ELECTROCHEMICAL FUEL CELL SYSTEM
    7.
    发明申请
    COOLING SUBSYSTEM FOR AN ELECTROCHEMICAL FUEL CELL SYSTEM 审中-公开
    用于电化学燃料电池系统的冷却子系统

    公开(公告)号：US20110070511A1

    公开(公告)日：2011-03-24

    申请号：US12956226

    申请日：2010-11-30

    申请人： Amy E. Nelson ,  Bruce Lin ,  Joy A. Roberts ,  Uwe M. Limbeck ,  Craig R. Louie ,  Peter J. Bach

    发明人： Amy E. Nelson ,  Bruce Lin ,  Joy A. Roberts ,  Uwe M. Limbeck ,  Craig R. Louie ,  Peter J. Bach

    IPC分类号： H01M8/04

    CPC分类号： H01M8/04029 ,  H01M8/04223 ,  H01M8/04225 ,  H01M8/04302 ,  H01M2300/0082

    摘要： Improvements in startup time for an electrochemical fuel cell system from freezing and sub-freezing temperatures may be observed by minimizing the coolant volume in the coolant subsystem. In particular, this may be accomplished by having a two pump—dual loop cooling subsystem. During startup, one pump directs coolant through a startup coolant loop and after either the fuel cell stack or the coolant temperature reaches a predetermined threshold value, coolant from a main or standard coolant loop is then directed to the fuel cell stack. In an embodiment, coolant from the standard loop mixes with coolant in the startup loop after the predetermined threshold temperature is reached.

    摘要翻译： 通过最小化冷却剂子系统中的冷却剂体积可以观察到从冷冻和低温温度对电化学燃料电池系统的启动时间的改进。 特别地，这可以通过具有两个泵 - 双回路冷却子系统来实现。 在启动期间，一个泵将冷却剂引导通过启动冷却剂回路，并且在燃料电池堆或冷却剂温度达到预定阈值之后，来自主或标准冷却剂回路的冷却剂然后被引导到燃料电池堆。 在一个实施例中，在达到预定阈值温度之后，来自标准回路的冷却剂与起动回路中的冷却剂混合。