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    • 76. 发明申请
    • Electrode structure for solid polymer fuel cell, its production method, and solid polymer fuel cell
    • 固体聚合物燃料电池的电极结构,其制备方法和固体高分子燃料电池
    • US20040180250A1
    • 2004-09-16
    • US10480375
    • 2003-12-11
    • Masaaki NanaumiYoichi AsanoNagayuki KanaokaHiroshi SohmaNaoki Mitsuta
    • H01M008/10H01M004/96H01M004/92H01M004/88
    • H01M4/926C08J5/2256C08J5/2262C08J2371/12H01M4/92H01M8/04126H01M8/1004H01M8/1025H01M8/1027H01M8/1032H01M8/1039Y02P70/56
    • The present invention provides an electrode structure having a pair of electrode catalyst layers and a polymer electrolyte membrane held between both the electrode catalyst layers. The polymer electrolyte membrane contains 5% or more by weight of the water coordinated to protons of sulfonic acid groups. The polymer electrolyte membrane comprises a fluorine-containing ion conducting polymer. The ratio of the fluorine content in the above polymer electrolyte membrane to the fluorine content in the above electrode catalyst layer is within the range of from 0.2 to 2.0. The polymer electrolyte membrane is a sulfonate of a copolymer general formulas (1) and (2). The electrode catalyst layer contains platinum within the range of from 0.01 to 0.8 mg/cm2, and the average particle diameter of a carbon particle as a carrier is within the range of from 10 to 100 nm. The polymer electrolyte membrane is produced by forming a membrane from the above sulfonate solution and drying the obtained membrane. The membrane contains from 3 to 15% by weight of a solvent after drying. The electrode structure is produced by applying an electric current of 0.1 A/cm2 or higher for 5 hours or more in a humidified environment at a relative humidity of 60% or more. The electrode structure constitutes a fuel cell, which generates power when oxidizing gas is supplied to the one side of the electrode structure and reducing gas to the other side.
    • 本发明提供一种具有一对电极催化剂层和保持在两个电极催化剂层之间的聚合物电解质膜的电极结构。 聚合物电解质膜含有与磺酸基质子配位的5重量%以上的水。 聚合物电解质膜包含含氟离子导电聚合物。 上述聚合物电解质膜中的氟含量与上述电极催化剂层中氟含量的比例在0.2〜2.0的范围内。 聚合物电解质膜是通式(1)和(2)的共聚物的磺酸盐。 电极催化剂层含有铂在0.01〜0.8mg / cm 2的范围内,作为载体的碳粒子的平均粒径在10〜100nm的范围内。 聚合物电解质膜通过从上述磺酸盐溶液形成膜并干燥得到的膜来制造。 干燥后,膜含有3〜15重量%的溶剂。 通过在相对湿度60%以上的加湿环境中施加0.1A / cm 2以上的电流5小时以上来制造电极结构体。 电极结构构成燃料电池,当氧化气体被供给到电极结构的一侧并将气体还原到另一侧时,发电。