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    • 7. 发明申请
    • REDUCED THERMAL CONDUCTIVITY IN PEM FUEL CELL GAS DIFFUSION LAYERS
    • 在PEM燃料电池气体扩散层中降低热导率
    • WO2011043760A1
    • 2011-04-14
    • PCT/US2009/005562
    • 2009-10-08
    • UTC POWER CORPORATIONBADRINARAYANAN, ParavastuDARLING, Robert, M.O'NEILL, Jonathan, D.
    • BADRINARAYANAN, ParavastuDARLING, Robert, M.O'NEILL, Jonathan, D.
    • H01M8/02H01M8/10
    • H01M8/0202H01M2008/1095
    • A fuel cell for a fuel cell power plant having gas diffusion layers which do not have microporous layers, includes a PEM (9), a cathode comprising at least a cathode catalyst (10) and a gas diffusion layer (17) on one side of the PEM, and an anode comprising at least an anode catalyst (11) and a gas diffusion layer (14) on the opposite side of the PEM, and a porous water transport plate having reactant gas flow field channels (31, 32) (21, 28) adjacent to each of said support substrates as well as water flow channels (22) in at least one of said water transport plates. The thermal conductivity of the cathode and/or the anode gas diffusion layers is less than about one- quarter of the thermal conductivity of conventional gas diffusion layers, less than about 0.25 W/m/K, to promote flow of water from the cathodes to the anodes and to the adjacent water transport plates, during start-up at normal ambient temperatures (lower than normal PEM fuel cell operating temperatures).
    • 一种具有不具有微孔层的气体扩散层的燃料电池发电厂的燃料电池,包括PEM(9),至少包含阴极催化剂(10)的阴极和在一侧的气体扩散层(17) 所述PEM和在所述PEM相反侧的至少包含阳极催化剂(11)和气体扩散层(14)的阳极和具有反应气体流场通道(31,32)(21,32)的多孔水输送板 ,28),以及至少一个所述水输送板中的水流通道(22)。 阴极和/或阳极气体扩散层的热导率小于常规气体扩散层的热导率的约四分之一,小于约0.25W / m / K,以促进水从阴极流到 阳极和相邻的水输送板,在正常环境温度(低于正常PEM燃料电池工作温度)的启动期间。
    • 9. 发明申请
    • WETTABLE GAS DIFFUSION LAYER FOR A WET SEAL IN A FUEL CELL
    • 可湿性气体扩散层,用于在燃料电池中密封
    • WO2008088310A1
    • 2008-07-24
    • PCT/US2006/049343
    • 2006-12-27
    • UTC POWER CORPORATIONBADRINARAYANAN, Paravastu
    • BADRINARAYANAN, Paravastu
    • H01M8/00
    • H01M8/0267H01M8/0234H01M8/0243H01M8/0258H01M8/026H01M8/0265H01M8/0276H01M8/241
    • An example fuel cell stack (10, 40) includes a cathode plate (60) having oxidant flow passages (62) and coolant flow passages (64), and a porous anode plate (42) adjacent the coolant flow passages (64). The porous anode plate (42) includes fuel flow passages (46) and a network of pores (44) that fluidly connect the fuel flow passages (46) and the coolant flow passages (64). A membrane electrode arrangement (50) adjacent the fuel flow passages (46) generates electricity in a fuel cell reaction. A hydrophilic gas diffusion layer (48) between the membrane electrode arrangement (50) and the porous anode plate (42) distributes water from the coolant flow passages (64) to maintain or establish a wet seal (70) within the network of pores (44) that limits fuel transport through the network of pores (44) from the fuel flow passages (46) to the coolant flow passages (64).
    • 示例性燃料电池堆(10,40)包括具有氧化剂流动通道(62)和冷却剂流动通道(64)的阴极板(60)和邻近冷却剂流动通道(64)的多孔阳极板(42)。 多孔阳极板(42)包括燃料流动通道(46)和流体连接燃料流动通道(46)和冷却剂流动通道(64)的孔(44)网络。 邻近燃料流动通道(46)的膜电极装置(50)在燃料电池反应中产生电力。 在膜电极装置(50)和多孔阳极板(42)之间的亲水性气体扩散层(48)从冷却剂流动通道(64)分配水以保持或建立在孔网络内的湿密封(70) 44)限制从燃料流动通道(46)到冷却剂流动通道(64)的通过孔(44)的网络的燃料传输。