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A review on microstructure reconstruction of PEM fuel cells porous electrodes for pore scale simulation

机译：用于孔尺度模拟的PEM燃料电池多孔电极的微观结构重建研究进展

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摘要

PEM fuel cells are currently at the focus of researchers' attention due to their promising potential application in modern vehicles. Fundamental tiny-scale phenomena occurring in the PEM fuel cell porous electrodes can be represented more faithfully by pore scale simulation techniques which entail microstructure reconstruction of porous media such as GDL, MPL and CL rather than conventional simulation methods. In fact, to achieve a realistic and accurate pore geometry is crucial for a trustworthy pore scale simulation, especially when the effect of morphology and structural parameters are to be investigated. In the present article, three classes of the of PEM fuel cells porous media reconstructions which have been performed for pore scale simulation of fluid flow are outlined and reviewed. Stochastic and X-ray tomography reconstruction of carbon paper GDL is well-understood in the literature, even if GDL is compressed or treated by binder/PTFE. However, more efforts are needed to reconstruct the MPL and CL using either stochastic or FIB/SEM methods. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
机译：PEM燃料电池由于其在现代车辆中的潜在应用前景，目前已成为研究人员关注的焦点。 PEM燃料电池多孔电极中发生的基本微小尺度现象可以用孔尺度模拟技术更真实地表示，该技术需要对多孔介质（例如GDL，MPL和CL）进行微结构重建，而不是常规的模拟方法。实际上，实现真实，准确的孔几何结构对于可信赖的孔尺度模拟至关重要，尤其是在要研究形态学和结构参数的影响时。在本文中，概述并回顾了三类PEM燃料电池多孔介质重构，这些重构已用于流体流动的孔尺度模拟。碳纸GDL的随机和X射线断层摄影术重建在文献中是很容易理解的，即使GDL被粘合剂/ PTFE压缩或处理也是如此。但是，需要更多的努力来使用随机或FIB / SEM方法重建MPL和CL。 （C）2016氢能出版物有限公司。由Elsevier Ltd.出版。保留所有权利。

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