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    • 2. 发明授权
    • Bifunctional gas diffusion electrodes employing wettable, non-wettable
layered structure using the mud-caking concept
    • 双功能气体扩散电极采用可湿透,不可润湿的层状结构,采用泥浆结构
    • US5318862A
    • 1994-06-07
    • US124874
    • 1993-09-22
    • Chia-Tsun LiuJohn F. Jackovitz
    • Chia-Tsun LiuJohn F. Jackovitz
    • H01M4/86H01M12/08
    • H01M4/86H01M12/08Y02E60/128
    • A bifunctional gas diffusion electrode used in an electrochemical energy cell wherein a multi-ply composite layer containing an embedded metal screen current collector provides electrical power via the reduction of oxygen from air in the presence of an electrolyte and a catalyst. The electrode stores electrical power via the evolution of oxygen in the presence of an electrolyte and another catalyst. More than one composite layer may be used. Each ply of any particular composite layer is made of carbon-containing material of varying wettability and a fluorocarbon material. Each hydrophobic central ply contain a metal screen current collector. These central plies are prepared in a way to foster fissuring throughout the ply. Such fissuring, along with a hydrophilic impregnate forced into these fissures, permits controlled electrolyte penetration of the hydrophobic ply. Hydrophilic end plies sandwich the central ply and produce a large surface area for catalyzed oxygen reduction during the cell discharge cycle or catalyzed oxygen generation during cell charge cycle.
    • 用于电化学能量池的双功能气体扩散电极,其中包含嵌入式金属屏蔽集电体的多层复合层通过在电解质和催化剂存在下从空气中还原氧提供电力。 电极在电解质和另一种催化剂的存在下通过氧的逸出来储存电力。 可以使用多于一个的复合层。 任何特定复合层的每层由不同润湿性的含碳材料和氟碳材料制成。 每个疏水中心层包含金属屏蔽集电器。 这些中心层是为了促进整个层的裂缝而准备的。 这种裂缝以及强制进入这些裂缝的亲水性浸渍物允许控制电解质渗透疏水层。 亲水端层夹层中间层,并在电池放电循环期间产生催化氧还原的大表面积或在电池充电循环期间催化氧产生。