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    • 4. 发明申请
    • Gas Diffusion Layer for Fuel Cell Vehicle with Improved Operational Stability
    • 燃料电池车辆气体扩散层具有改进的运行稳定性
    • US20100129696A1
    • 2010-05-27
    • US12543361
    • 2009-08-18
    • Bo Ki HongKook II HanSang Yeoul AhnKeun Je LeeByeong Heon Jeong
    • Bo Ki HongKook II HanSang Yeoul AhnKeun Je LeeByeong Heon Jeong
    • H01M2/14
    • H01M8/0245H01M4/8807H01M8/0234H01M2008/1095Y02E60/50
    • The present invention provides a gas diffusion layer for a fuel cell vehicle with improved operational stability, the gas diffusion layer, which functions to supply hydrogen and air (oxygen) as reactant gases to a fuel cell stack, discharge product water generated by an electrochemical reaction, and transmit generated electricity, being formed with a thinned structure.For this purpose, the present invention provides a gas diffusion layer for a fuel cell vehicle with improved operational stability, the gas diffusion layer being formed with a dual layer structure including a microporous layer and a macroporous substrate, the macroporous substrate being formed of a material selected from the group consisting of carbon fiber felt and carbon fiber paper, the gas diffusion layer being thinned to have a thickness of 200 to 300 μm at 25 kPa and a thickness of 170 to 250 μm at 1 MPa, a density of 0.20 to 0.60 g/cm3 at 25 kPa, a porosity of 50 to 90% measured by mercury intrusion, and a through-plane electrical resistance of 30 mΩ·cm2 or lower measured at a clamping pressure of 1 MPa.
    • 本发明提供一种燃料电池车辆的气体扩散层,其具有改进的操作稳定性,气体扩散层用于将氢气和空气(氧气)作为反应气体供应到燃料电池堆,排出由电化学反应产生的产物水 并且发送生成的电力,形成有薄的结构。 为此,本发明提供一种燃料电池车辆的气体扩散层,其具有改善的操作稳定性,气体扩散层由具有微孔层和大孔基体的双层结构形成,大孔基体由材料形成 选自由碳纤维毡和碳纤维纸组成的组,气体扩散层在25kPa下变薄至厚度为200-300μm,在1MPa下为170-250μm,密度为0.20至0.60 25kPa下的g / cm 3,通过水银侵蚀测定的孔隙率为50〜90%,夹钳压力为1MPa时测定的通孔面电阻为30mΩ·cm 2·cm 2以下。