-
1.发明授权Method and apparatus for operating an electrochemical fuel cell with periodic fuel starvation at the anode 失效用于在阳极处操作具有周期性燃料不足的电化学燃料电池的方法和装置
公开(公告)号：US6096448A
公开(公告)日：2000-08-01
申请号：US998133
申请日：1997-12-23
申请人： David P. Wilkinson , Clarence Y. F. Chow , Derek E. Allan, deceased , by Patricia Joanne Allan, administrator , Erik P. Johannes , Joy A. Roberts , Jean St-Pierre , Cindy J. Longley , John K. K. Chan
发明人： David P. Wilkinson , Clarence Y. F. Chow , Derek E. Allan, deceased , by Patricia Joanne Allan, administrator , Erik P. Johannes , Joy A. Roberts , Jean St-Pierre , Cindy J. Longley , John K. K. Chan
CPC分类号： H01M8/04223 , H01M8/04089 , H01M8/0662 , H01M2300/0082
摘要： A method and apparatus is provided for operating an electrochemical fuel cell with periodic momentary fuel starvation at the anode. It is believed that such momentary periodic fuel starvation conditions cause the anode potential to increase, resulting in the oxidation and removal of electrocatalyst poisons from the anode electrocatalyst and improved fuel cell performance. In a preferred method, while successive localized portions of the fuel cell anode are momentarily periodically fuel starved, the remainder of the fuel cell anode remains electrochemically active and saturated with fuel such that the fuel cell is continually available to generate power.
摘要翻译： 提供一种用于操作在阳极周期性瞬时燃料不足的电化学燃料电池的方法和装置。 据信这种瞬时的周期性燃料不足情况导致阳极电位增加，导致电极催化剂氧化和除去阳极电催化剂并改善燃料电池性能。 在优选的方法中，虽然燃料电池阳极的连续局部部分暂时地周期性地燃料不足，但燃料电池阳极的其余部分保持电化学活性并被燃料饱和，使得燃料电池连续地可用于发电。
-
2.发明授权Method and apparatus for distributing water to an ion-exchange membrane in a fuel cell 失效将水分配到燃料电池中的离子交换膜的方法和装置
公开(公告)号：US5935726A
公开(公告)日：1999-08-10
申请号：US980496
申请日：1997-12-01
CPC分类号： H01M8/04089 , H01M8/04119 , H01M8/04291 , H01M2300/0082 , H01M8/04007 , H01M8/04126 , H01M8/04156 , H01M8/04164 , H01M8/249
摘要： A method and apparatus are provided for distributing water produced by the electrochemical reaction to an ion-exchange membrane in a electrochemical fuel cell. Water distribution within a fuel cell is improved to reduce membrane dryness near the oxidant stream inlet and to also reduce saturation of the oxidant stream near the oxidant stream outlet, thereby reducing electrode flooding. The method comprises periodically reversing the flow direction of an oxidant stream through a fuel cell flow field. The apparatus comprises an oxidant stream flow switching device for periodically switching the flow direction of an oxidant stream through a fuel cell flow field. In one embodiment the apparatus further comprises a water recycler for capturing water from the oxidant exhaust stream and returning the captured water to the oxidant supply stream when the flow direction is reversed.
摘要翻译： 提供了一种方法和装置，用于将通过电化学反应产生的水分配到电化学燃料电池中的离子交换膜。 提高了燃料电池内的水分配，以减少氧化剂流入口附近的膜干度并且还减少氧化剂流出口附近的氧化剂流的饱和度，从而减少电极淹没。 该方法包括周期性地反转氧化剂流通过燃料电池流场的流动方向。 该装置包括用于周期性地切换氧化剂流通过燃料电池流场的流动方向的氧化剂流流动切换装置。 在一个实施例中，该装置还包括水回收器，用于从氧化剂排出流捕获水并且当流动方向反向时将捕获的水返回到氧化剂供应流。
-
3.发明授权公开(公告)号：US06322914B1
公开(公告)日：2001-11-27
申请号：US09322871
申请日：1999-05-28
IPC分类号： H01M804
CPC分类号： H01M8/04089 , H01M8/04007 , H01M8/04119 , H01M8/04126 , H01M8/04156 , H01M8/04164 , H01M8/04291 , H01M8/249 , H01M2300/0082
摘要： A method and apparatus are provided for distributing water produced by the electrochemical reaction to ion-exchange membranes in an array comprising a plurality of electrochemical fuel cell stacks. Water distribution within individual fuel cell stacks within the array is improved to reduce membrane dryness near the oxidant stream inlet and to also reduce saturation of the oxidant stream near the oxidant stream outlet, thereby reducing electrode flooding. The method comprises periodically reversing the oxidant stream flow direction within at least one of the plurality of fuel cell stacks. The apparatus comprises an oxidant stream flow switching device for periodically switching the flow direction of an oxidant stream through an individual fuel cell stack.
摘要翻译： 提供了一种方法和装置，用于将由电化学反应产生的水分散到包括多个电化学燃料电池堆的阵列中的离子交换膜。 提高阵列内单个燃料电池堆内的水分配，以减少氧化剂流入口附近的膜干度，并且还减少氧化剂流出口附近的氧化剂流的饱和度，从而减少电极淹没。 该方法包括周期地反转多个燃料电池堆中的至少一个内的氧化剂流流动方向。 该装置包括用于周期性地切换氧化剂流的流动方向通过单个燃料电池堆的氧化剂流流动切换装置。
-
-
搜索结果
3 条记录 (耗时 0.018 秒)
