Effect of interfacial structure between micro-porous layer and catalyst layer on water on transport in PEFC
Effect of interfacial structure between micro-porous layer and catalyst layer on water on transport in PEFC
复制标题
微孔层与催化剂层之间的界面结构对水在PEFC中传输的影响
DOI：
10.1149/05801.1383ecst
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
T. Tanuma
中科院分区：
文献类型：
--
作者：
Y. Aoyama;K. Suzuki;Y. Tabe;T. Chikahisa;T. Tanuma
尽管微孔层（MPLs）具有抑制水驱的作用，但其机理尚未完全了解。我们观察到的横截面内的阴极侧MPL的液态水分布，以澄清MPL/催化剂层（CL）的界面结构上的MPL中的水传输的效果。采用冷冻法和低温扫描电镜进行观察。同时还采用了两种不同的方法（贴花转印法和GDE法）制备的膜电极组件（MEA）。结果表明，在贴花法制备的膜电极中，液态水分布在陆地下方的MPL内部和气流通道下方的MPL/CL界面处。相比之下，在由GDE方法制备的MEA中，在MPL中的液态水分布在陆地和通道下是相似的。这些结果表明，界面结构对MPL中液态水的分布有很大的影响。
Although micro-porous layers (MPLs) have a role to suppress water flooding, the mechanism has not been fully understood. We observed the cross-sectional liquid water distribution inside a cathode side MPL to clarify the effect of the MPL/catalyst layer (CL) interfacial structure on water transport in the MPL. The freezing method and cryo-SEM are used for the observation. The membrane electrode assemblies (MEAs) made by two different methods (decal transfer method and GDE method) were also used. The result showed that in the MEA prepared by the decal method, liquid water is distributed inside the MPL under the land, and at the MPL/CL interface under the gas-flow channel. In contrast, in the MEA made by the GDE method, the liquid water distributions in the MPL are similar both under the land and channel. These results indicate that interfacial structure has a strong effect on liquid water distribution in the MPL.