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    • 9. 发明授权
    • Process for preparing a membrane/electrode assembly
    • 制备膜/电极组件的方法
    • US5702755A
    • 1997-12-30
    • US554066
    • 1995-11-06
    • Robert D. Mussell
    • Robert D. Mussell
    • H01M4/86H01M4/88H01M4/92H01M8/02H01M8/04H01M8/10
    • H01M4/8828H01M4/8605H01M4/8882H01M4/926H01M8/1004H01M2300/0082H01M8/04291
    • 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.
    • 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。