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17 条记录 (耗时 0.021 秒)

    Thermoplastic polymer compositions with modified electrical conductivity
    1.
    发明授权
    Thermoplastic polymer compositions with modified electrical conductivity 失效
    具有改进导电性的热塑性聚合物组合物

    公开(公告)号：US5844037A

    公开(公告)日：1998-12-01

    申请号：US686634

    申请日：1996-07-24

    申请人： Richard A. Lundgard ,  Susan J. Babinec ,  Robert D. Mussell ,  Ashish Sen

    发明人： Richard A. Lundgard ,  Susan J. Babinec ,  Robert D. Mussell ,  Ashish Sen

    IPC分类号： C08J3/20 ,  C08J3/22 ,  C08L101/00 ,  H01B1/24 ,  C08K3/04 ,  C08L23/04 ,  H01B1/06

    CPC分类号： C08J3/226 ,  H01B1/24 ,  C08J2423/00 ,  Y10S524/901

    摘要： A process for preparing an electronically-conductive thermoplastic composition having at least two phases, which includes (A) combining an amorphous or semi-crystalline thermoplastic polymer or miscible blend of polymers with an electronically-conductive carbon under conditions sufficient to disperse the conductive carbon, thereby forming a mixture having at least one phase, with at least 60 percent of the carbon dispersed in a first phase which comprises at least 90 percent by weight of the mixture; and (B) combining the mixture obtained from step (A) with an amorphous or semi-crystalline thermoplastic polymer or miscible blend of polymers, at least a portion of which is immiscible in the first phase, thereby forming a composition having at least two phases. Compositions prepared by this process are sufficiently conductive to be useful for a variety of applications, such as structural materials for applications requiring electromotively-paintable substrates.

    摘要翻译： 一种用于制备具有至少两相的电子导电热塑性组合物的方法，其包括（A）在足以分散导电碳的条件下将非晶或半结晶热塑性聚合物或可混合的聚合物共混物与电子导电碳组合， 从而形成具有至少一相的混合物，其中至少60％的碳分散在包含至少90重量％混合物的第一相中; 和（B）将从步骤（A）获得的混合物与无定形或半结晶热塑性聚合物或可混合的聚合物共混物组合，其至少一部分在第一相中是不混溶的，从而形成具有至少两相的组合物 。 通过该方法制备的组合物具有足够的导电性，可用于各种应用，例如需要电动涂漆基材的应用的结构材料。

    Active layer for membrane electrode assembly
    4.
    发明授权
    Active layer for membrane electrode assembly 失效
    膜电极组件的活性层

    公开(公告)号：US5882810A

    公开(公告)日：1999-03-16

    申请号：US813773

    申请日：1997-03-07

    申请人： Robert D. Mussell ,  Timothy J. Rehg

    发明人： Robert D. Mussell ,  Timothy J. Rehg

    IPC分类号： H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/02 ,  H01M8/04 ,  H01M8/10

    CPC分类号： H01M4/8657 ,  H01M4/8642 ,  H01M4/8668 ,  H01M4/926 ,  H01M8/1004 ,  H01M2300/0082 ,  H01M4/8605 ,  H01M8/0228 ,  H01M8/04291

    摘要： Described is a membrane electrode assembly having an ion exchange membrane, and at least two active layers positioned on the same side of the membrane; wherein the active layers containing catalytically-active particles and an ionomer; the average equivalent weights of the ionomers in the layers differ by at least 50; and the active layer positioned closest to the membrane contains the ionomer with the lower average equivalent weight. This membrane electrode assembly, when utilized in a fuel cell, provides a relatively high voltage at a given current density and gas flow rate.

    摘要翻译： 描述了具有离子交换膜和位于膜的同一侧上的至少两个活性层的膜电极组件; 其中所述活性层含有催化活性颗粒和离聚物; 层中离聚物的平均当量重量至少为50; 最靠近膜的活性层含有平均当量较低的离聚物。 当在燃料电池中使用时，该膜电极组件在给定的电流密度和气体流速下提供相对较高的电压。

    Process for preparing a membrane/electrode assembly
    5.
    发明授权
    Process for preparing a membrane/electrode assembly 失效
    制备膜/电极组件的方法

    公开(公告)号：US5702755A

    公开(公告)日：1997-12-30

    申请号：US554066

    申请日：1995-11-06

    申请人： Robert D. Mussell

    发明人： Robert D. Mussell

    IPC分类号： H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/02 ,  H01M8/04 ,  H01M8/10

    CPC分类号： H01M4/8828 ,  H01M4/8605 ,  H01M4/8882 ,  H01M4/926 ,  H01M8/1004 ,  H01M2300/0082 ,  H01M8/04291

    摘要： A composition comprising (a) catalytically-active particles, (b) an organic compound having a pKa of at least about 18 and a basicity parameter, .beta., of less than 0.66, and (c) a polymeric binder. Also described is a process for preparing a membrane/electrode assembly, which comprises the sequential steps of (i) applying a layer of the composition of the invention to a solid polymer electrolyte, a carbon fiber paper, or a release substrate; (ii) heating the composition under conditions sufficient to volatilize at least 95 percent of component (b); and (iii) positioning the composition in contact with the solid polymer electrolyte, if the composition was not applied directly to the solid polymer electrolyte, forming the membrane/electrode assembly thereby. It has been discovered that the composition and process of the invention, when used to prepare a membrane electrode assembly (MEA) having a solid polymer electrolyte, provides an MEA which provides a relatively high voltage at a given current density and gas flow rate in a fuel cell.

    摘要翻译： 一种组合物，其包含（a）催化活性颗粒，（b）具有至少约18的pKa和碱度参数β的小于0.66的有机化合物，和（c）聚合物粘合剂。 还描述了制备膜/电极组件的方法，其包括以下顺序步骤：（i）将本发明的组合物层施加到固体聚合物电解质，碳纤维纸或剥离基材上; （ii）在足以挥发至少95％的组分（b）的条件下加热组合物; 和（iii）将组合物定位为与固体聚合物电解质接触，如果该组合物没有直接施加到固体聚合物电解质上，则由此形成膜/电极组合物。 已经发现，当用于制备具有固体聚合物电解质的膜电极组件（MEA）时，本发明的组合物和方法提供了MEA，其以给定的电流密度和气体流速提供相对高的电压 燃料电池。

    Flow field assembly for electrochemical fuel cells
    6.
    发明授权
    Flow field assembly for electrochemical fuel cells 失效
    电化学燃料电池的流场组装

    公开(公告)号：US5620807A

    公开(公告)日：1997-04-15

    申请号：US522482

    申请日：1995-08-31

    申请人： Robert D. Mussell ,  Steven P. Webb ,  Carey L. Scortichini ,  Keith R. Plowman

    发明人： Robert D. Mussell ,  Steven P. Webb ,  Carey L. Scortichini ,  Keith R. Plowman

    IPC分类号： H01M4/92 ,  H01M8/10

    CPC分类号： H01M4/926 ,  H01M8/1004 ,  H01M2300/0082

    摘要： An electrochemical fuel cell having a membrane electrode assembly and a layer of an electrically conductive porous material adjacent thereto which has at least two portions with different mean pore sizes, wherein a first portion of the layer adjacent to the membrane electrode assembly has a porosity no greater than a second portion of the layer adjacent to the opposite side of the layer; the second portion has a porosity of at least about 82 percent; and the second portion has an mean pore size which is at least about 10 microns and at least ten times greater than the mean pore size of the first portion.

    摘要翻译： 一种具有膜电极组件和与其相邻的导电多孔材料层的电化学燃料电池，其具有至少两个具有不同平均孔径的部分，其中与膜电极组件相邻的层的第一部分的孔隙率不大 比层的与相对侧相邻的层的第二部分; 第二部分具有至少约82％的孔隙率; 并且第二部分具有比第一部分的平均孔径大至少约10微米且至少十倍的平均孔径。

    Electrode ink for membrane electrode assembly
    8.
    发明授权
    Electrode ink for membrane electrode assembly 失效
    用于膜电极组件的电极墨

    公开(公告)号：US5869416A

    公开(公告)日：1999-02-09

    申请号：US904258

    申请日：1997-07-31

    申请人： Robert D. Mussell

    发明人： Robert D. Mussell

    IPC分类号： H01M4/86 ,  H01M4/88 ,  H01M4/92 ,  H01M8/02 ,  H01M8/04 ,  H01M8/10

    CPC分类号： H01M4/8828 ,  H01M4/8605 ,  H01M4/8882 ,  H01M4/926 ,  H01M8/1004 ,  H01M2300/0082 ,  H01M8/04291

    摘要： A composition comprising (a) catalytically-active particles, (b) an organic compound having a pKa of at least about 18 and a basicity parameter, .beta., of less than 0.66, and (c) a polymeric binder. Also described is a process for preparing a membrane/electrode assembly, which comprises the sequential steps of (i) applying a layer of the composition of the invention to a solid polymer electrolyte, a carbon fiber paper, or a release substrate; (ii) heating the composition under conditions sufficient to volatilize at least 95 percent of component (b); and (iii) positioning the composition in contact with the solid polymer electrolyte, if the composition was not applied directly to the solid polymer electrolyte, forming the membrane/electrode assembly thereby. It has been discovered that the composition and process of the invention, when used to prepare a membrane electrode assembly (MEA) having a solid polymer electrolyte, provides an MEA which provides a relatively high voltage at a given current density and gas flow rate in a fuel cell.

    摘要翻译： 一种组合物，其包含（a）催化活性颗粒，（b）具有至少约18的pKa和碱度参数β的小于0.66的有机化合物，和（c）聚合物粘合剂。 还描述了制备膜/电极组件的方法，其包括以下顺序步骤：（i）将本发明的组合物层施加到固体聚合物电解质，碳纤维纸或剥离基材上; （ii）在足以挥发至少95％的组分（b）的条件下加热组合物; 和（iii）将组合物定位为与固体聚合物电解质接触，如果该组合物没有直接施加到固体聚合物电解质上，则由此形成膜/电极组合物。 已经发现，当用于制备具有固体聚合物电解质的膜电极组件（MEA）时，本发明的组合物和方法提供了MEA，其以给定电流密度和气体流速提供相对高的电压 燃料电池。