Gas diffusion electrodes based on poly(vinylidene fluoride) carbon blends
    1.
    发明授权
    Gas diffusion electrodes based on poly(vinylidene fluoride) carbon blends 失效
    基于聚(偏二氟乙烯)碳共混物的气体扩散电极

    公开(公告)号:US5783325A

    公开(公告)日:1998-07-21

    申请号:US697582

    申请日:1996-08-27

    摘要: All electrocatalytic gas diffusion electrode for fuel cells and a process for its preparation is disclosed. The electrode comprises an anistropic gas diffusion layer and a catalytic layer. The gas diffusion layer is made of a porous carbon matrix through which carbon particles and poly(vinylidene) fluoride are distributed so that the matrix is homogeneously porous in a direction lateral to gas flow and asymmetrically porous to gases in the direction of the gas flow. The porosity of the gas diffusion layer decreases in the direction of gas flow. The catalytic layer is made of a coagulated ink suspension containing catalytic carbon particles and a thermoplastic polymer selected from polyethersulfone, poly(vinylidene fluoride) and sulfonated polysulfone and covers the small pore surface of the gas diffusion layer. The gas diffusion layer has a thickness between 50 .mu.m and 300 .mu.m. The catalytic layer has thickness between 7 .mu.m and 50 .mu.m and a metal catalyst loading between 0.2 mg/cm.sup.2 and 0.5 mg/cm.sup.2.

    摘要翻译: 公开了用于燃料电池的所有电催化气体扩散电极及其制备方法。 该电极包括无向分支气体扩散层和催化层。 气体扩散层由碳颗粒和聚(亚乙烯基)氟化物分布的多孔碳基质制成,使得基体在气流横向方向上均匀多孔,在气流方向上与气体不对称多孔。 气体扩散层的孔隙率在气流方向上减小。 催化层由含有催化碳颗粒和选自聚醚砜,聚(偏二氟乙烯)和磺化聚砜的热塑性聚合物的凝结油墨悬浮液制成,并覆盖气体扩散层的小孔表面。 气体扩散层的厚度为50〜300μm。 催化剂层的厚度在7μm至50μm之间,金属催化剂负载在0.2mg / cm2至0.5mg / cm2之间。

    Thin ribbonlike flexible rechargeable zinc/halide cell
    2.
    发明授权
    Thin ribbonlike flexible rechargeable zinc/halide cell 失效
    薄带状柔性可充电锌/卤化物电池

    公开(公告)号:US5011749A

    公开(公告)日:1991-04-30

    申请号:US377443

    申请日:1989-07-10

    IPC分类号: H01M10/39

    CPC分类号: H01M10/365

    摘要: A rechargeable zinc halide electrochemical cell comprises a laminate of the sequence:a. an electrically conducting chemically inert material;b. a matrix supporting a zinc halide; andc. an electrically conducting layer adapted to absorb and adsorb halogen. Inert and ion specific separation layers can be added to the laminate.Because of the laminate construction of the cell, the cell of the present invention can be made in an extremely thin configuration.

    Water soluble phosphorylated polysiloxanes
    3.
    发明授权
    Water soluble phosphorylated polysiloxanes 失效
    水溶性磷酸化聚硅氧烷

    公开(公告)号:US5449736A

    公开(公告)日:1995-09-12

    申请号:US93185

    申请日:1993-07-16

    摘要: This invention relates to a novel family of phosphorylated polysiloxanes which are non-ionic and water soluble. When these polysiloxanes are dissolved in water, the resulting solutions exhibit low surface tensions. The invention also relates to phosphorylated polysiloxanes which are gels or hydrogels. The invention further contemplates methods of synthesizing the phosphorylated polysiloxanes.

    摘要翻译: 本发明涉及非离子和水溶性磷酸化聚硅氧烷的新型家族。 当这些聚硅氧烷溶于水时,所得溶液表现出低的表面张力。 本发明还涉及作为凝胶或水凝胶的磷酸化聚硅氧烷。 本发明进一步考虑了合成磷酸化聚硅氧烷的方法。

    Sulfonated polyethylene rearrangement of polyorganosiloxanes
    10.
    发明授权
    Sulfonated polyethylene rearrangement of polyorganosiloxanes 失效
    聚有机硅氧烷的磺化聚乙烯重排

    公开(公告)号:US5486590A

    公开(公告)日:1996-01-23

    申请号:US386040

    申请日:1995-02-09

    IPC分类号: C08G77/38 C08G77/08 C08G77/10

    CPC分类号: C08G77/10 C08G77/08

    摘要: A process for the rearrangement of polyorganosiloxanes using solid sulfonated polyethylene as a rearrangement catalyst. The process comprises contacting polyorganosiloxanes at a temperature within a range of about 20.degree. C. to 110.degree. C. with a rearrangement catalyst consisting essentially of a solid sulfonated polyethylene. In a preferred process, the solid sulfonated polyethylene is in the form of hollow fibers through which the polyorganosiloxanes are passed to effect rearrangement.

    摘要翻译: 使用固体磺化聚乙烯作为重排催化剂重排聚有机硅氧烷的方法。 该方法包括使聚有机硅氧烷在约20℃至110℃范围内的温度下与基本上由固体磺化聚乙烯组成的重排催化剂接触。 在优选的方法中,固体磺化聚乙烯是中空纤维的形式,通过该中空纤维通过聚有机硅氧烷以实现重排。