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    • 1. 发明授权
    • Development of a novel method for preparation of PEMFC electrodes
    • 开发制备PEMFC电极的新方法
    • US08465858B2
    • 2013-06-18
    • US11191605
    • 2005-07-28
    • Branko N. PopovHansung Kim
    • Branko N. PopovHansung Kim
    • H01M8/02H01M4/86H01M4/88H01M4/96
    • H01M4/8853C25D3/50C25D5/18C25D5/54C25D7/00H01M4/8807H01M4/8882H01M4/92H01M4/926H01M8/1007
    • A method based on pulse electrodeposition technique was developed for preparation of membrane electrode assemblies (MEAs). In this approach, platinum is deposited directly on the surface of the carbon electrode. The method ensures most of the platinum to be in close contact with the membrane. Using this method it is possible to increase the Pt/C ratio up to 75 wt % near the surface of the electrode resulting in a 5 μm thick catalyst layer. The MEA prepared by pulse electrodeposition exhibits a current density of 0.33 A/cm2 at 0.8 V with platinum loading of 0.25 mg of Pt/cm2. The results indicate that pulse deposition may be an attractive technique to replace the conventional powder-type MEA preparation methods and help achieve industry goals of reducing catalyst cost and increasing efficiency in polymer electrode membrane fuel cells (PEMFCs).
    • 开发了基于脉冲电沉积技术的方法来制备膜电极组件(MEA)。 在这种方法中,铂直接沉积在碳电极的表面上。 该方法可确保大部分铂与膜紧密接触。 使用该方法,可以在电极表面附近增加高达75重量%的Pt / C比,导致5μm厚的催化剂层。 通过脉冲电沉积制备的MEA在0.8V下表现出0.33A / cm 2的电流密度,铂负载为0.25mg Pt / cm 2。 结果表明,脉冲沉积可能是取代常规粉末MEA制备方法的有吸引力的技术,有助于实现降低催化剂成本和提高聚合物电极膜燃料电池(PEMFC)的效率的行业目标。