利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

27 条记录 (耗时 0.022 秒)

    Diffusion media with microporous layer
    2.
    发明申请
    Diffusion media with microporous layer 有权
    扩散介质与微孔层

    公开(公告)号：US20060046926A1

    公开(公告)日：2006-03-02

    申请号：US10925853

    申请日：2004-08-25

    申请人： Chunxin Ji ,  Jeanette O'Hara ,  Mark Mathias

    发明人： Chunxin Ji ,  Jeanette O'Hara ,  Mark Mathias

    IPC分类号： H01M4/88 ,  B05D5/12 ,  H01M4/96 ,  H01M4/94

    CPC分类号： H01M4/8657 ,  H01M4/0471 ,  H01M4/8605 ,  H01M4/8817 ,  H01M8/0234

    摘要： Specially prepared gas diffusion media improve the performance of PEM fuel cells. The media are made by first dipping an electrically conductive porous material such as carbon fiber paper into a suspension of hydrophobic polymer and drying the paper to create a desired deposition pattern of hydrophobic polymer on the substrate. Then a paste containing a fluorocarbon polymer and carbon particles is applied to a desired side of the substrate, and thereafter the paste and hydrophobic polymer are sintered together at high temperature on the paper. In particular, nonionic surfactants remain on the carbon fiber paper after the initial hydrophobic polymer is applied to the electrically conductive porous material. When the paste is coated on the dried paper, the paste is in contact with a hydrophilic surface.

    摘要翻译： 专门制备的气体扩散介质提高了PEM燃料电池的性能。 介质通过首先将诸如碳纤维纸的导电多孔材料浸渍到疏水性聚合物的悬浮液中并干燥纸以在基材上产生所需的疏水性聚合物沉积图案来制备。 然后将含有氟碳聚合物和碳颗粒的糊剂涂覆到基材的期望侧，然后将该糊状物和疏水性聚合物在高温下烧结在纸上。 特别地，在将初始疏水性聚合物施加到导电多孔材料之后，非离子表面活性剂残留在碳纤维纸上。 当糊料涂布在干燥的纸上时，糊料与亲水性表面接触。

    Control of polymer surface distribution on diffusion media for improved fuel cell performance
    3.
    发明申请
    Control of polymer surface distribution on diffusion media for improved fuel cell performance 有权
    控制扩散介质上聚合物表面分布，提高燃料电池性能

    公开(公告)号：US20050084742A1

    公开(公告)日：2005-04-21

    申请号：US10924317

    申请日：2004-08-23

    申请人： Anastasios Angelopoulos ,  Chunxin Ji ,  Mark Mathias

    发明人： Anastasios Angelopoulos ,  Chunxin Ji ,  Mark Mathias

    IPC分类号： B05D5/12 ,  B32B9/00 ,  H01M4/88 ,  H01M4/94 ,  H01M4/96 ,  H01M8/02 ,  H01M8/10

    CPC分类号： H01M8/0202 ,  H01M8/0234 ,  H01M8/0239 ,  H01M8/0245 ,  H01M2008/1095 ,  Y02P70/56 ,  Y10T428/30

    摘要： Favorable performance of diffusion media in fuel cells has found to be correlated to a parameter (the C/F ratio) that relates to a spatial and thickness distribution of the hydrophobic fluoropolymer on the carbon fiber substrate structure of the medium. Suitable diffusion media may be chosen from among commercially coated diffusion media by measuring the C/F ratio by means of energy dispersive spectroscopy, and choosing the diffusion media if the value of the C/F ratio is within the preferred range. Alternatively, the diffusion media may be manufactured with an improved process that consistently yields values of C/F ratio in the desired range.

    摘要翻译： 发现燃料电池中扩散介质的有利性能与涉及介质的碳纤维衬底结构上的疏水性含氟聚合物的空间和厚度分布的参数（C / F比）相关。 合适的扩散介质可以通过用能量色散光谱法测量C / F比例从市售的扩散介质中选择，如果C / F比值在优选的范围内，则选择扩散介质。 或者，扩散介质可以用改进的方法制造，其一致地产生所需范围内C / F比的值。

    Diffusion media with vapor deposited fluorocarbon polymer
    6.
    发明申请
    Diffusion media with vapor deposited fluorocarbon polymer 审中-公开
    具有气相沉积氟碳聚合物的扩散介质

    公开(公告)号：US20070218344A1

    公开(公告)日：2007-09-20

    申请号：US11384705

    申请日：2006-03-20

    申请人： Chunxin Ji ,  Mark Mathias

    发明人： Chunxin Ji ,  Mark Mathias

    IPC分类号： H01M4/94 ,  H01M4/00 ,  H01M8/10 ,  H01M4/88 ,  B05D5/12

    CPC分类号： H01M8/0245 ,  H01M8/04291 ,  H01M8/1007

    摘要： Fuel cells contain diffusion media having vapor-deposited fluorocarbon polymers on a conductive substrate. A diffusion medium for use in a PEM fuel cell contains hydrophobic and hydrophilic areas for improved water management. A hydrophobic polymer such as a fluororesin is vapor deposited on the paper to define the hydrophobic areas; hydrophilic areas are those areas uncovered by hydrophobic polymer, or covered by an additionally deposited hydrophilic polymer

    摘要翻译： 燃料电池含有在导电基底上具有气相沉积氟碳聚合物的扩散介质。 用于PEM燃料电池的扩散介质包含用于改善水管理的疏水和亲水区域。 将诸如氟树脂之类的疏水性聚合物气相沉积在纸上以限定疏水区域; 亲水区域是由疏水性聚合物覆盖的或被额外沉积的亲水性聚合物覆盖的那些区域

    Preparation of patterned diffusion media
    7.
    发明申请
    Preparation of patterned diffusion media 有权
    图案扩散介质的制备

    公开(公告)号：US20050233080A1

    公开(公告)日：2005-10-20

    申请号：US10824032

    申请日：2004-04-14

    申请人： Chunxin Ji ,  Michael Schoeneweiss ,  Mark Mathias ,  Joerg Roth

    发明人： Chunxin Ji ,  Michael Schoeneweiss ,  Mark Mathias ,  Joerg Roth

    IPC分类号： B05D1/32 ,  D21H13/50 ,  D21H19/20 ,  D21H19/66 ,  D21H19/72 ,  D21H19/84 ,  H01M4/86 ,  H01M8/00 ,  H01M8/10

    CPC分类号： H01M8/0239 ,  D21H13/50 ,  D21H19/20 ,  D21H19/66 ,  D21H19/72 ,  D21H19/84 ,  H01M4/8605 ,  H01M8/0234 ,  H01M8/0245 ,  H01M8/1007

    摘要： Gas diffusion media for use in fuel cells are provided that contain a pattern of deposited hydrophobic polymer such that less than 100% of the surface of the diffusion media is covered with hydrophobic polymer. The media are made by first wetting a sheet of carbon fiber paper in an aqueous emulsion of the hydrophobic polymer. The wetted sheet is contacted with a pattern member containing one or more openings oriented to correspond to a predetermined or desired pattern of hydrophobic polymer deposition. While still in contact with the pattern member, the sheet is heated or otherwise treated to cause evaporation of the water from the sheet. Evaporation while in contact with the pattern member takes place in such a way that hydrophobic polymer is concentrated in the sheet at the openings of the pattern member by the process of evaporation.

    摘要翻译： 提供了用于燃料电池的气体扩散介质，其包含沉积的疏水性聚合物的图案，使得少于100％的扩散介质的表面被疏水聚合物覆盖。 介质通过首先在疏水性聚合物的水乳液中润湿碳纤维纸片而制成。 润湿的片材与包含一个或多个开口的图案构件接触，该开口定向成对应于预定或期望的疏水性聚合物沉积图案。 在仍然与图案构件接触的同时，片材被加热或以其他方式处理以引起水从片材的蒸发。 在与图案构件接触的同时进行蒸发，其方式是通过蒸发过程将疏水性聚合物集中在图案构件的开口处的片材中。

    GAS DIFFUSION LAYER WITH LOWER GAS DIFFUSIVITY
    8.
    发明申请
    GAS DIFFUSION LAYER WITH LOWER GAS DIFFUSIVITY 审中-公开
    具有较低气体差异的气体扩散层

    公开(公告)号：US20100028744A1

    公开(公告)日：2010-02-04

    申请号：US12185640

    申请日：2008-08-04

    申请人： CHRISTIAN WIESER ,  Chunxin Ji ,  Mark Mathias ,  Daniel R. Baker ,  Paul D. Nicotera

    发明人： CHRISTIAN WIESER ,  Chunxin Ji ,  Mark Mathias ,  Daniel R. Baker ,  Paul D. Nicotera

    IPC分类号： H01M8/10 ,  H01M4/86 ,  H01M8/02

    CPC分类号： H01M8/0243 ,  H01M8/0234 ,  H01M8/0239 ,  H01M2008/1095

    摘要： A gas diffusion layer for use in fuel cells comprises a fiber and non-fiber material in a ratio such that the water vapor diffusion transport resistance is greater than 0.8 s/cm measured at 80 C and 150 kPa absolute gas pressure when the gas diffusion layer has a thickness less than or equal to 300 microns. Another gas diffusion layer comprises a fiber and non-fiber material in a ratio such that the water vapor diffusion transport resistance is lower than 0.4 s/cm measured at 80 C and 150 kPa absolute gas pressure when the gas diffusion layer has a thickness greater than or equal to 100 microns. Fuel cells incorporating the gas diffusion layers are also provided.

    摘要翻译： 用于燃料电池的气体扩散层包括纤维和非纤维材料，其比例使得当气体扩散层在80℃和150kPa绝对气压下测得的水蒸气扩散传输阻力大于0.8s / cm 具有小于或等于300微米的厚度。 另一个气体扩散层包括纤维和非纤维材料，其比例使得当气体扩散层的厚度大于80℃时，在80℃和150kPa绝对气压下测得的水蒸汽扩散传输阻抗低于0.4s / cm 或等于100微米。 还提供了并入气体扩散层的燃料电池。