公开(公告)号：US07955752B2

公开(公告)日：2011-06-07

申请号：US11142762

申请日：2005-06-01

申请人： Bernd Krause ,  Joerg Roth

发明人： Bernd Krause ,  Joerg Roth

IPC分类号： H01M8/04

CPC分类号： H01M8/0265 ,  H01M8/0258 ,  H01M8/04082 ,  H01M8/241 ,  H01M8/2457 ,  H01M2008/1095

摘要： A fuel cell that includes specially configured bipolar plates that separate the reactant gas flow field in an active area of the fuel cell into a primary flow channels and a secondary channels. In one embodiment, the primary flow channels are in use over the entire operating range of the fuel cell and the secondary flow channels are only in use at high cell current outputs. At low power demands, the primary channels operate at a voltage below 0.8 volts and provides a gas current density of more than 0.2 A/cm2. The secondary flow channels have no gas supply and operate at mass transport limited conditions. Because of this design, voltage cycling is significantly reduced or eliminated, thus increasing the life of the fuel cell.

摘要翻译： 一种燃料电池，其包括特殊配置的双极板，其将燃料电池的有效区域中的反应气体流场分离成主流道和次流道。 在一个实施例中，主流动通道在燃料电池的整个操作范围内使用，并且次级流动通道仅在高电池电流输出时使用。 在低功率需求下，主通道工作在低于0.8伏的电压，并提供大于0.2A / cm2的气体电流密度。 二次流动通道没有气体供应并且在大规模运输有限的条件下运行。 由于这种设计，电压循环显着降低或消除，从而增加燃料电池的寿命。

公开(公告)号：US07629071B2

公开(公告)日：2009-12-08

申请号：US11017527

申请日：2004-12-20

申请人： Han Liu ,  Robert C. McDonald ,  Thomas J. McCallum ,  Anthony B. LaConti ,  John Forchione ,  Jeanette O'Hara ,  Joerg Roth

发明人： Han Liu ,  Robert C. McDonald ,  Thomas J. McCallum ,  Anthony B. LaConti ,  John Forchione ,  Jeanette O'Hara ,  Joerg Roth

IPC分类号： H01M4/86 ,  C01B11/04

CPC分类号： H01M8/0245 ,  H01M4/8605 ,  H01M4/8657 ,  H01M4/8807 ,  H01M4/8817 ,  H01M4/8828 ,  H01M8/0232 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0243 ,  H01M8/0271 ,  H01M8/1007 ,  H01M2004/021 ,  Y02P70/56 ,  Y10T428/249962 ,  Y10T428/249981 ,  Y10T428/30

摘要： A gas diffusion electrode and method of making the same. According to one embodiment, the electrode comprises a support layer, a first cushioning layer positioned on top of the support layer, a second cushioning layer positioned on top of the first cushioning layer, and a catalyst layer positioned on top of the second cushioning layer. The support layer is a mechanically stable, electrically-conductive, gas porous substrate, such as carbon fiber paper. The first cushioning layer, which is also gas porous, comprises a non-woven mat of electrically-conductive, chemically-inert fibers, preferably carbon nanofibers, bound together with a polymeric binder, such as polytetrafluoroethylene. The second cushioning layer is similar to the first cushioning layer, except that carbon black or a similar electrically-conductive, chemically-inert particulate material is included in addition to or instead of the fibrous material for the purpose of fine-tuning pore size.

摘要翻译： 气体扩散电极及其制造方法。 根据一个实施例，电极包括支撑层，位于支撑层顶部的第一缓冲层，位于第一缓冲层顶部的第二缓冲层和位于第二缓冲层顶部的催化剂层。 支撑层是机械稳定的，导电的气体多孔基底，例如碳纤维纸。 也是气体多孔的第一缓冲层包括与聚合物粘合剂如聚四氟乙烯结合在一起的导电的，化学惰性的纤维，优选碳纳米纤维的无纺毡。 第二缓冲层类似于第一缓冲层，除了除了或代替纤维材料之外还包括炭黑或类似的导电，化学惰性的颗粒材料，以便微调孔径。

公开(公告)号：US20070077484A1

公开(公告)日：2007-04-05

申请号：US11242737

申请日：2005-10-04

申请人： Joerg Roth

发明人： Joerg Roth

IPC分类号： H01M4/94 ,  H01M8/02 ,  H01M8/10 ,  H01M4/96 ,  B32B3/26

CPC分类号： H01M8/023 ,  H01M8/04149 ,  H01M8/04291 ,  H01M2008/1095 ,  Y10T428/249953

摘要： A diffusion media for use in a fuel cell stack and that is adjacently aligned with lands of a reactant plate of the fuel cell stack. The diffusion media includes a sheet having a permeable material with a thickness. A plurality of water transport pores are defined through the sheet. Each of the pores has a pore diameter that is greater than 1.5 times the thickness.

摘要翻译： 用于燃料电池堆并且与燃料电池堆的反应物板的焊盘相邻地对准的扩散介质。 扩散介质包括具有厚度的可渗透材料的片材。 通过片材限定多个水输送孔。 每个孔的孔径大于厚度的1.5倍。

公开(公告)号：US07107864B2

公开(公告)日：2006-09-19

申请号：US10342898

申请日：2003-01-15

申请人： Joerg Roth

发明人： Joerg Roth

IPC分类号： G01N11/00

CPC分类号： G01N13/04 ,  G01N15/0893

摘要： The present invention discloses various methods in which a quality of a diffusion media for use in a fuel cell assembly can be qualitatively evaluated. The material constant, an internal contact angle, a ratio of high and low energy pores, and an external contact angle can be calculated for the diffusion media and compared to a predetermined standard to evaluate the quality of the diffusion media.

公开(公告)号：US20060037416A1

公开(公告)日：2006-02-23

申请号：US11249663

申请日：2005-10-13

申请人： Joerg Roth

发明人： Joerg Roth

IPC分类号： G01N11/00

CPC分类号： G01N13/04 ,  G01N15/0893

摘要： The present invention discloses various methods in which a quality of a diffusion media for use in a fuel cell assembly can be qualitatively evaluated. The material constant, an internal contact angle, a ratio of high and low energy pores, and an external contact angle can be calculated for the diffusion media and compared to a predetermined standard to evaluate the quality of the diffusion media.

摘要翻译： 本发明公开了可以定性地评价用于燃料电池组件的扩散介质的质量的各种方法。 可以计算扩散介质的材料常数，内部接触角，高能和低能隙的比率和外部接触角，并与预定标准进行比较，以评估扩散介质的质量。

公开(公告)号：US07670704B2

公开(公告)日：2010-03-02

申请号：US11255734

申请日：2005-10-21

申请人： Jeanette E. O'Hara ,  Joerg Roth ,  Han Liu

发明人： Jeanette E. O'Hara ,  Joerg Roth ,  Han Liu

IPC分类号： H01M8/10

CPC分类号： H01M8/04291 ,  H01M8/023 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0243 ,  H01M8/0245 ,  H01M8/04156 ,  H01M2250/20 ,  Y02T90/32 ,  Y10T442/2139 ,  Y10T442/2164 ,  Y10T442/2484 ,  Y10T442/2984

摘要： A diffusion media and a process for its fabrication are provided for addressing issues related to water management in electrochemical cells and other devices employing the diffusion media. In accordance with one embodiment of the present invention, a process for fabricating a diffusion media is provided. A diffusion media substrate is provided comprising a porous fibrous matrix defining first and second major faces. The substrate comprises an amount of carbonaceous material sufficient to render the substrate electrically conductive. A mesoporous layer is applied along at least a portion of one of the first and second major faces of the substrate. The mesoporous layer is applied to the substrate by providing a coating comprising a hydrophobic component, a hydrophilic component, and a pore forming agent. The substrate is free of fluorinated polymers outside of regions of the substrate carrying the mesoporous layer. The pore forming agent is decomposed such that the mesoporous layer is more porous than the diffusion media substrate.

摘要翻译： 提供扩散介质及其制造方法，用于解决与电化学电池和使用扩散介质的其它器件中的水管理有关的问题。 根据本发明的一个实施例，提供了制造扩散介质的方法。 提供扩散介质基底，其包括限定第一和第二主要面的多孔纤维基质。 衬底包括足以使衬底导电的一定量的碳质材料。 沿着衬底的第一和第二主面中的一个的至少一部分施加介孔层。 通过提供包含疏水组分，亲水组分和成孔剂的涂层将介孔层施加到基底上。 衬底在承载介孔层的衬底的区域之外不含氟化聚合物。 孔形成剂分解，使得介孔层比扩散介质基材多孔。

公开(公告)号：US20050199079A1

公开(公告)日：2005-09-15

申请号：US11127376

申请日：2005-05-12

申请人： Joerg Roth

发明人： Joerg Roth

IPC分类号： G01N13/04 ,  G01N15/08 ,  H01M2/02

CPC分类号： G01N13/04 ,  G01N15/0893

摘要： The present invention discloses various methods in which a quality of a diffusion media for use in a fuel cell assembly can be qualitatively evaluated. The material constant, an internal contact angle, a ratio of high and low energy pores, and an external contact angle can be calculated for the diffusion media and compared to a predetermined standard to evaluate the quality of the diffusion media.

摘要翻译： 本发明公开了可以定性地评价用于燃料电池组件的扩散介质的质量的各种方法。 可以计算扩散介质的材料常数，内部接触角，高能和低能隙的比率和外部接触角，并与预定标准进行比较，以评估扩散介质的质量。

公开(公告)号：US06928893B2

公开(公告)日：2005-08-16

申请号：US10342976

申请日：2003-01-15

申请人： Joerg Roth

发明人： Joerg Roth

IPC分类号： G01N13/04 ,  G01N15/08 ,  H01M2/02 ,  G01N33/00

CPC分类号： G01N13/04 ,  G01N15/0893

摘要： The present invention discloses various methods in which a quality of a diffusion media for use in a fuel cell assembly can be qualitatively evaluated. The material constant, an internal contact angle, a ratio of high and low energy pores, and an external contact angle can be calculated for the diffusion media and compared to a predetermined standard to evaluate the quality of the diffusion media.

公开(公告)号：US07284411B2

公开(公告)日：2007-10-23

申请号：US11127376

申请日：2005-05-12

申请人： Joerg Roth

发明人： Joerg Roth

IPC分类号： G01N15/08 ,  H01M4/06

CPC分类号： G01N13/04 ,  G01N15/0893

摘要： The present invention discloses various methods in which a quality of a diffusion media for use in a fuel cell assembly can be qualitatively evaluated. The material constant, an internal contact angle, a ratio of high and low energy pores, and an external contact angle can be calculated for the diffusion media and compared to a predetermined standard to evaluate the quality of the diffusion media.

摘要翻译： 本发明公开了可以定性地评价用于燃料电池组件的扩散介质的质量的各种方法。 可以计算扩散介质的材料常数，内部接触角，高能和低能隙的比率和外部接触角，并与预定标准进行比较，以评估扩散介质的质量。

公开(公告)号：US20060275644A1

公开(公告)日：2006-12-07

申请号：US11142762

申请日：2005-06-01

申请人： Bernd Krause ,  Joerg Roth

发明人： Bernd Krause ,  Joerg Roth

IPC分类号： H01M8/02

CPC分类号： H01M8/0265 ,  H01M8/0258 ,  H01M8/04082 ,  H01M8/241 ,  H01M8/2457 ,  H01M2008/1095

摘要： A fuel cell that includes specially configured bipolar plates that separate the reactant gas flow field in an active area of the fuel cell into a primary flow channels and a secondary channels. In one embodiment, the primary flow channels are in use over the entire operating range of the fuel cell and the secondary flow channels are only in use at high cell current outputs. At low power demands, the primary channels operate at a voltage below 0.8 volts and provides a gas current density of more than 0.2 A/cm2. The secondary flow channels have no gas supply and operate at mass transport limited conditions. Because of this design, voltage cycling is significantly reduced or eliminated, thus increasing the life of the fuel cell.

摘要翻译： 一种燃料电池，其包括特殊配置的双极板，其将燃料电池的有效区域中的反应气体流场分离成主流道和次流道。 在一个实施例中，主流动通道在燃料电池的整个操作范围内使用，并且次级流动通道仅在高电池电流输出时使用。 在低功率需求下，主通道工作在低于0.8伏特的电压，并提供大于0.2A / cm 2的气体电流密度。 二次流动通道没有气体供应并且在大规模运输有限的条件下运行。 由于这种设计，电压循环显着降低或消除，从而增加燃料电池的寿命。