-
11.发明授权公开(公告)号：US06350538B1
公开(公告)日：2002-02-26
申请号：US09384531
申请日：1999-08-27
IPC分类号： H01M804
CPC分类号： H01M8/241 , H01M8/0206 , H01M8/0213 , H01M8/0221 , H01M8/0226 , H01M8/0228 , H01M8/0232 , H01M8/0236 , H01M8/0239 , H01M8/0243 , H01M8/0245 , H01M8/0256 , H01M8/0263 , H01M8/0271 , H01M8/2483 , H01M2300/0082 , Y10T29/4911 , Y10T428/30
摘要： A fuel cell comprises a pair of separator plates and a pair of fluid distribution layers interposed between the separator plates. At least one of the fluid distribution layers comprises a sealing region and an electrically conductive, fluid permeable active region, and a thermoplastic polymeric material extending into each of the sealing region and the active region. An ion exchange membrane is interposed between at least a portion of the fluid distribution layers, and a quantity of electrocatalyst is interposed between at least a portion of each of the fluid distribution layers and at least a portion of the membrane, thereby defining the active region. Melt-bonding the thermoplastic material in the sealing region renders the at least one fluid distribution layer substantially fluid impermeable in a direction parallel to the major planar surfaces. This approach reduces or eliminates the need for separate gaskets or sealing components and integrates several functions, such as sealing, fluid distribution, and current collection in a single layer.
摘要翻译： 燃料电池包括一对分隔板和插在隔板之间的一对流体分布层。 流体分配层中的至少一个包括密封区域和导电的，可流体渗透的活性区域，以及延伸到每个密封区域和活性区域中的热塑性聚合物材料。 在至少一部分流体分配层之间插入离子交换膜，并且在每个流体分配层的至少一部分和至少一部分膜之间插入一定量的电催化剂，从而限定活性区 。 将热塑性材料熔合在密封区域中使得至少一个流体分布层在平行于主平面的方向上基本上不渗透。 这种方法减少或消除了对单独的垫圈或密封部件的需要，并且在单层中集成了诸如密封，流体分配和电流收集的几个功能。
-
12.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
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。
-
13.发明授权Electrochemical fuel cell membrane electrode assembly with porous electrode substrate 失效电化学燃料电池膜电极组件与多孔电极基板
公开(公告)号：US6060190A
公开(公告)日：2000-05-09
申请号：US217177
申请日：1998-12-21
CPC分类号： H01M4/8626 , H01M4/86 , H01M4/8605 , H01M4/926 , H01M4/96 , H01M8/0213 , H01M8/1004 , H01M8/1007 , H01M8/1009 , H01M2300/0082 , Y10T29/49108
摘要： A membrane electrode assembly for an electrochemical fuel cell includes a pair of electrodes and an ion exchange membrane interposed therebetween. At least one of the electrodes comprises a porous electrode substrate. The substrate comprises a preformed macroporous web having a through-plane resistivity of greater than 1 .OMEGA.*cm. The web contains an electrically conductive filler. A method for preparing the membrane electrode assembly includes the steps of (a) forming a porous electrode substrate for an electrochemical fuel cell by filling a preformed macroporous web, the web having a through-plane resistivity of greater than 1 .OMEGA.*cm, with an electrically conductive filler and (b) consolidating the electrode pair and ion exchange membrane to form a unitary assembly.
摘要翻译： 用于电化学燃料电池的膜电极组件包括一对电极和置于其间的离子交换膜。 至少一个电极包括多孔电极基底。 该基材包括具有大于1欧米伽*厘米的直面电阻率的预成型大孔网。 网包含导电填料。 制备膜电极组件的方法包括以下步骤：（a）通过填充预成型的大孔网形成用于电化学燃料电池的多孔电极基底，所述网的直面电阻率大于1欧米加*厘米， 导电填料和（b）固结电极对和离子交换膜以形成整体组件。
-
14.发明授权Method and apparatus for reducing reactant crossover in an electrochemical fuel cell 失效减少电化学燃料电池中反应物交叉的方法和装置
公开(公告)号：US5672439A
公开(公告)日：1997-09-30
申请号：US574262
申请日：1995-12-18
CPC分类号： H01M4/926 , H01M4/86 , H01M4/8605 , H01M4/8626 , H01M4/96 , H01M8/0213 , H01M8/1007 , H01M8/1009 , H01M2300/0082 , H01M8/1004
摘要： In an electrochemical fuel cell, a sufficient quantity of catalyst, effective for promoting the reaction of reactant supplied to an electrode, is disposed within the volume of the electrode so that a reactant introduced at a first major surface of the electrode is substantially completely reacted upon contacting the second major surface. Crossover of reactant from one electrode to the other electrode through the electrolyte in an electrochemical fuel cell is thereby reduced.
摘要翻译： 在电化学燃料电池中，在电极的体积内设置足够量的促进反应物供应到电极的催化剂，使得在电极的第一主表面上引入的反应基本上完全反应在 接触第二主表面。 因此，电化学燃料电池中通过电解质从一个电极到另一个电极的反应物交叉交叉。
-
15.发明授权公开(公告)号：US06974647B2
公开(公告)日：2005-12-13
申请号：US10180197
申请日：2002-06-26
CPC分类号： H01M8/241 , H01M8/0206 , H01M8/0213 , H01M8/0221 , H01M8/0226 , H01M8/0228 , H01M8/0232 , H01M8/0236 , H01M8/0239 , H01M8/0243 , H01M8/0245 , H01M8/0256 , H01M8/0263 , H01M8/0271 , H01M8/2483 , H01M2300/0082 , Y10T29/4911 , Y10T428/30
摘要： A fuel cell fluid distribution layer, in one embodiment, comprises perforated graphite foil. The fluid distribution layer can have one or more reactant flow field channels formed in one or both major surfaces, one or more manifold openings, conductive filler on one or both major surfaces, conductive filler at least partially filling some or all perforations and/or an electrocatalyst one or both major surfaces.
摘要翻译： 在一个实施例中，燃料电池流体分布层包括穿孔石墨箔。 流体分配层可以具有形成在一个或两个主表面中的一个或多个反应物流场通道，一个或多个歧管开口，一个或两个主表面上的导电填料，至少部分填充一些或所有穿孔的导电填料和/或 电催化剂一个或两个主要表面。
-
公开(公告)号：US06548202B2
公开(公告)日：2003-04-15
申请号：US09799183
申请日：2001-03-05
IPC分类号： H01M496
CPC分类号： H01M4/9083 , H01M4/8605 , H01M4/8846 , H01M4/90 , H01M4/926 , H01M8/1004 , H01M2300/0082
摘要： Carbon-supported catalysts are frequently employed in the electrodes of solid polymer fuel cells in order to make efficient use of the catalyst therein. The catalyst utilization in the electrode and the fuel cell performance can be further improved by introducing acidic surface oxide groups on the carbon-supported catalyst. The introduction of acidic surface oxide groups on the carbon-supported catalyst can be accomplished by treating the carbon-supported catalyst with a suitable acid, such as nitric acid, before incorporating the carbon-supported catalyst in a fuel cell electrode. The present technique is particularly suitable for use in solid polymer fuel cell cathodes.
摘要翻译： 为了有效利用其中的催化剂，常常在固体聚合物燃料电池的电极中使用碳载体催化剂。 通过在碳载体催化剂上引入酸性表面氧化物基，能够进一步提高电极中的催化剂利用率和燃料电池性能。 在碳载体催化剂上引入酸性表面氧化物基团可以通过在将碳载体催化剂加入到燃料电池电极中之前，用合适的酸如硝酸处理碳负载的催化剂来实现。 本技术特别适用于固体聚合物燃料电池阴极。
-
17.发明授权Electrochemical cell with fluid distribution layer having integral sealing capability 失效具有集成密封能力的流体分布层的电化学电池
公开(公告)号：US5976726A
公开(公告)日：1999-11-02
申请号：US846653
申请日：1997-05-01
申请人： David P. Wilkinson , Juergen Stumper , Stephen A. Campbell , Michael T. Davis , Gordon J. Lamont
发明人： David P. Wilkinson , Juergen Stumper , Stephen A. Campbell , Michael T. Davis , Gordon J. Lamont
CPC分类号： H01M8/241 , H01M8/0206 , H01M8/0213 , H01M8/0226 , H01M8/0228 , H01M8/0232 , H01M8/0236 , H01M8/0239 , H01M8/0243 , H01M8/0245 , H01M8/0256 , H01M8/0263 , H01M8/0271 , H01M2300/0082 , H01M8/0221 , Y10T29/4911 , Y10T428/30
摘要： An electrochemical fuel cell comprises a pair of separator plates and a pair of fluid distribution layers interposed between the separator plates. At least one of the fluid distribution layers comprises a sealing region and an electrically conductive, fluid permeable active region, and a preformed sheet material extending into each of the sealing region and the active region. An ion exchange membrane is interposed between at least a portion of the fluid distribution layers, and a quantity of electrocatalyst is interposed between at least a portion of each of the fluid distribution layers and at least a portion of the membrane, thereby defining the active region. Compression of the preformed sheet material by urging of the pair of plates towards each other renders the at least one fluid distribution layer substantially fluid impermeable in a direction parallel to the major planar surfaces, in the sealing region. The performed sheet material included in the at least one fluid distribution layer thus has intrinsic sealing capability. This approach reduces or eliminates the need for separate gaskets or sealing components and integrates several functions, such as sealing, fluid distribution, and current collection, in a single layer.
摘要翻译： 一种电化学燃料电池包括一对分隔板和一对介于隔板之间的流体分布层。 流体分配层中的至少一个包括密封区域和导电的，可流体渗透的有源区域，以及延伸到每个密封区域和活性区域中的预成型片材。 在至少一部分流体分配层之间插入离子交换膜，并且在每个流体分配层的至少一部分和至少一部分膜之间插入一定量的电催化剂，由此限定有源区 。 通过使一对板彼此推动来压缩预成型片材使得至少一个流体分配层在密封区域中在平行于主平面的方向上基本上不可渗透。 因此，包含在至少一个流体分配层中的所执行的片材具有固有的密封能力。 这种方法减少或消除了对单独的垫片或密封部件的需求，并且在单层中集成了诸如密封，流体分配和电流收集的几个功能。
-
公开(公告)号：US06683011B2
公开(公告)日：2004-01-27
申请号：US09992173
申请日：2001-11-14
IPC分类号： H01L21469
CPC分类号： H01L21/02181 , C23C16/405 , H01L21/02205 , H01L21/02271 , H01L21/28202 , H01L21/31604 , H01L29/518
摘要： A process for forming a hafnium oxide-containing film on a substrate such as silicon that includes introducing an anhydrous hafnium nitrate-containing precursor into a reactor containing the substrate, and converting the precursor into the hafnium oxide-containing film on the substrate by chemical vapor deposition.
摘要翻译： 一种在诸如硅的衬底上形成含氧化铪的膜的方法，包括将含无水硝酸铪的前体引入含有衬底的反应器中，并通过化学气相将所述前体转化为所述衬底上的含氧化铪膜 沉积
-
公开(公告)号：US09799893B2
公开(公告)日：2017-10-24
申请号：US12446118
申请日：2007-10-18
申请人： Stephen A. Campbell
发明人： Stephen A. Campbell
IPC分类号： H01M4/92 , H01M4/90 , H01M8/1018
CPC分类号： H01M4/92 , H01M4/9075 , H01M4/925 , H01M2008/1095
摘要： A catalytic material for a fuel cell comprising a catalyst supported on a catalyst support, wherein the catalyst support comprises a Period IV transition metal phosphide is disclosed. A membrane electrode assembly (MEA) and fuel cell stack comprising such a catalytic material are similarly disclosed.
-
公开(公告)号：US08722284B2
公开(公告)日：2014-05-13
申请号：US13499068
申请日：2010-09-30
IPC分类号： H01M4/04
CPC分类号： B01J23/6484 , B01J23/6486 , H01M4/921 , H01M4/923 , H01M2008/1095
摘要： Provided is a catalyst composition comprising an intermetallic phase comprising Pt and a metal selected from either Nb or Ta, and a dioxide of the metal. Also provided is a low temperature method for making such compositions that results in the formation of intermetallic phase with small crystallite size and thus greater mass activity. In particular, a Pt3Nb—NbO2 catalyst composition can be prepared that is useful as a fuel cell catalyst and offers a very stable chemical substrate along with good electrode activity and remarkable durability. The use of Pt3Nb—NbO2 can considerably prolong fuel cell lifetime by reducing Pt dissolution levels and subsequent voltage losses. The Pt3Nb—NbO2 can be used in the cathode and/or anode of a fuel cell.
摘要翻译： 提供了一种催化剂组合物，其包含金属间相，其包含Pt和选自Nb或Ta的金属和金属的二氧化物。 还提供了一种用于制备这种组合物的低温方法，其导致形成具有小微晶尺寸的金属间相，从而导致更大的质量活性。 特别地，可以制备可用作燃料电池催化剂的Pt3Nb-NbO2催化剂组合物，并提供非常稳定的化学底物以及良好的电极活性和显着的耐久性。 Pt3Nb-NbO2的使用可以通过降低Pt溶解水平和随后的电压损耗来大大延长燃料电池寿命。 Pt3Nb-NbO2可用于燃料电池的阴极和/或阳极。
-
-
-
-
-
-
-
-
-
搜索结果
27 条记录 (耗时 0.033 秒)
