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    • 6. 发明公开
    • Solid polymer type fuel cell and method for manufacturing the same
    • Brennstoffzelle mit festen Polymerelektrolyten und Verfahren zu seiner Herstellung。
    • EP0637851A1
    • 1995-02-08
    • EP94110214.7
    • 1994-06-30
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • Uchida, MakotoAoyama, YukoEda, NobuoOgawa, Masahiko
    • H01M8/10
    • H01M8/1004Y02P70/56Y10T29/49115
    • The invention provides a solid polymer electrolyte having high performances in which the reaction area of electrode is increased by uniformly dispersing and bonding a solid polymer electrolyte and a catalyst and the ability of gas feeding to the reaction site is improved by adding a fluoropolymer so that the catalyst is not excessively coated. A method for making the fuel cell is also provided. The electrode provided on at least one side of a solid polymer electrolyte membrane is formed by coating on one side of a gas-diffusible layer a mixed dispersion of a noble metal catalyst, a carbon fine powder and a colloidal dispersion of a solid polymer electrolyte, the colloidal dispersion being prepared using an organic solvent having a polar group other than hydroxyl group in the molecule and having a carbon chain of 1-8 carbon atoms which bonds to the polar group or having a dielectric constant of 3-10.
    • 本发明提供了一种具有高性能的固体聚合物电解质,其中通过均匀分散和粘合固体聚合物电解质和催化剂来增加电极的反应面积,并且通过加入含氟聚合物来改善供气到反应部位的能力,使得 催化剂不被过度涂覆。 还提供了制造燃料电池的方法。 设置在固体聚合物电解质膜的至少一侧的电极通过在气体扩散层的一侧上涂覆贵金属催化剂,碳细粉末和固体聚合物电解质的胶体分散体的混合分散体而形成, 胶体分散体是用分子中具有非羟基的极性基团的有机溶剂制备的,具有与极性基团键合或介电常数为3-10的碳原子数为1-8的碳原子。
    • 7. 发明公开
    • Polymer electrolyte fuel cell
    • Polymer-Elektrolyt Brennstoffzelle
    • EP1298745A3
    • 2006-10-04
    • EP02256655.8
    • 2002-09-25
    • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    • Yoshida, AkihikoYamamoto, MasaoNiikura, JunjiTakebe, YasuoSakai, OsamuUchida, Makoto
    • H01M4/86H01M8/10H01M8/04
    • H01M4/8821H01M4/8605H01M4/8642H01M4/8652H01M4/8657H01M4/8828H01M4/92H01M4/96H01M8/04089H01M8/1004
    • A porous supporting carbon body of a gas diffusion layer is provided with a larger number of smaller pores at its catalyst layer side and a smaller number of larger pores at the other side, particularly with an appropriate distribution of finer mesh at its catalyst layer side and coarser mesh at the other side. Thereby, a high performance polymer electrolyte fuel cell can be obtained in which water generated at the catalyst layer is quickly sucked out to the gas diffusion layer, and is evaporated at the gas diffusion layer to be effectively exhausted to outside the fuel cell, so that excessive water can be prevented from retaining in the gas diffusion electrode, with the polymer electrolyte membrane being maintained at an appropriately wet condition.
      Further, a gas diffusion layer is provided with an electrically conductive polymer-containing layer comprising carbon particles and a polymer material. In it, a combination of two kinds of carbon particles having different amounts of acidic function group is used in a manner that the weight ratio of one kind having a larger acidic function group, relative to the other kind, increases from one end of the gas diffusion layer, corresponding to the inlet of a gas flow channel, to the other end. Thereby, the water permeating function at the surface of the gas diffusion layer can be so adjusted that the inside of the MEA is maintained at an appropriately wet condition, while excessive water is quickly exhausted to outside of the fuel cell together with e.g. the reactive gas. This can also be achieved by using a combination of two kinds of polymer materials in the electrically conductive polymer-containing layer in a manner that the two kinds have either different degrees of crystallinity or different coefficients of moisture permeability, so that the degrees of crystallinity decreases and the coefficients of moisture permeability increases from the one end to the other end of the gas diffusion layer.
    • 气体扩散层的多孔支撑碳体在其催化剂层侧具有更多的较小的孔,另一侧具有较小的较大的孔,特别是在其催化剂层侧具有适当的细网分布, 另一侧较粗的网格。 由此,能够得到将催化剂层中产生的水快速吸入气体扩散层的高性能聚合物电解质型燃料电池,在气体扩散层蒸发而被有效地排出到燃料电池外部, 可以防止过多的水滞留在气体扩散电极中,使聚合物电解质膜保持在适当的湿润状态。 此外,气体扩散层设置有包含碳颗粒和聚合物材料的导电聚合物含有层。 其中,使用具有不同量的酸性官能团的两种碳颗粒的组合,使得具有较大酸性官能团的一种相对于另一种类型的重量比从气体的一端增加 对应于气体流路的入口的扩散层到达另一端。 由此,可以调节气体扩散层表面的透水功能,使得MEA的内部保持在适当的湿润状态,同时过量的水被快速地排出到燃料电池外部。 反应气体。 这也可以通过在含导电聚合物的层中使用两种聚合物材料的组合来实现,其中两种具有不同的结晶度或不同的透湿系数,使得结晶度降低 并且透湿系数从气体扩散层的一端到另一端增加。