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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Hydrophobic Particles in a Gas Diffusion Electrode on Cell Performance in Polymer Electrolyte Membrane Fuel Cells
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Effect of Hydrophobic Particles in a Gas Diffusion Electrode on Cell Performance in Polymer Electrolyte Membrane Fuel Cells

机译：气体扩散电极中疏水颗粒对聚合物电解质膜燃料电池电池性能的影响

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摘要

The relationship between cell performance and the hydrophobic properties of a catalytic layercontaining hydrophobic particles in a gas diffusion electrode for a polymer electrolyte membrane fuelcell was investigated. The hydrophobic particles, prepared from carbon black andpolytetrafluoroethylene dispersion, were added to a catalytic layer to form a gas diffusion network byenhancing the hydrophobic property of the catalytic layer. The cell performance increased as thecatalytic layer became more hydrophobic. A more hydrophobic catalytic layer reduced blockage of thegas diffusion path that water, reaction product, caused. Water was produced by the electrochemicalreaction of the reactant gases at the catalytic layer. The hydrophobic property of the catalytic layer wasmore important at the high current density region compared with the low current density region. Athree-layered electrode system with a test layer and catalytic layer were used to investigate the flux ofhumidified gas through the catalytic layer. The hydrophobic nature of the test layer determined by theamount of hydrophobic particles in the catalytic layer influenced the gas flux and changed the cellperformance.
机译：研究了用于聚合物电解质膜燃料电池的气体扩散电极中电池性能与包含疏水性颗粒的催化层的疏水性之间的关系。将由炭黑和聚四氟乙烯分散体制备的疏水性颗粒添加到催化层中，以增强催化层的疏水性，从而形成气体扩散网络。随着催化层变得更疏水，电池性能提高。疏水性更高的催化层减少了由水，反应产物引起的气体扩散路径的阻塞。通过反应气体在催化层上的电化学反应产生水。与低电流密度区域相比，催化层的疏水性质在高电流密度区域更重要。具有测试层和催化层的三层电极系统用于研究湿气通过催化层的通量。由催化层中疏水颗粒的数量决定的测试层的疏水性影响了气体通量并改变了电池性能。

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