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首页> 外文期刊>Journal of Applied Polymer Science >Effects of thickness and hydrophobicity of double microporous layer on the performance in proton exchange membrane fuel cells
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Effects of thickness and hydrophobicity of double microporous layer on the performance in proton exchange membrane fuel cells

机译：双微孔层厚度和疏水性对质子交换膜燃料电池性能的影响

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In this paper, a multi-layer gas diffusion layer (GDL) is designed. The GDL consists of a single carbon paper backing layer and dual microporous layers (MPLs). Moreover, the effects of thickness and hydrophobicity of double MPL on the performance of proton exchange membrane fuel cells are investigated. From the test results of the water contact angle, conductivity, pore size distribution, and the polarization curve, it is found that the thickness adjustment increases the number of 0.5 to 7 mu m and 20 to 100 mu m pores in GDL, which is more conducive to water discharge. Therefore, the thickness adjustment is more favorable to the cell performance under high humidity. While the gradient hydrophobic design makes the MPL of the modified intermediate layer have a certain water-retaining capacity to humidify the reaction gas, which has better effect under low humidity. At last, the results show that the optimized GDL meets a limit power density of 1.772 W/cm(2) under 60% humidification and 1.600 W/cm(2) under 100% humidification.
机译：本文设计了一种多层气体扩散层（GDL）。GDL由一个碳纸背衬层和两个微孔层（MPLs）组成。此外，还研究了双层MPL的厚度和疏水性对质子交换膜燃料电池性能的影响。从水接触角、电导率、孔径分布和极化曲线的测试结果来看，厚度调整增加了GDL中0.5至7μm和20至100μm的孔隙数量，这更有利于排水。因此，厚度调整更有利于电池在高湿度下的性能。而梯度疏水设计使改性中间层的MPL具有一定的保水能力，对反应气体进行增湿，在低湿度下效果更好。结果表明，优化后的GDL在60%加湿条件下的极限功率密度为1.772W/cm2，在100%加湿条件下的极限功率密度为1.600W/cm2。

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