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Effect of micro-porous layer on PEM fuel cells performance: Considering the spatially variable properties

机译：微多孔层对PEM燃料电池性能的影响：考虑到空间可变性质

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摘要

As the key components that provide path for reactant and water transportation, the impact of gas diffusion layer (GDL) and micro-porous layer (MPL) on the performance of proton exchange membrane fuel cells (PEMFCs) has been extensively investigated. However, as a non-uniform porous medium, the study considering real spatially variable properties of GDL and MPL is really insufficient. In order to investigate the role of MPL with real spatially variable properties on PEMFCs performance and water management, a three-dimensional multi-phase model, which couples the catalyst layer agglomerate sub-model, is developed. It is found the uniform medium assumption for GDL and MPL might overstate the fuel cells performance when the output voltage is higher than 0.5V, especially under the high inlet relative humidity (RH). Besides, the spatially variable properties cause non-uniform distribution of liquid water and there are some saturation peaks in the middle or sides of GDL. Finally, the impact of inlet RH under different types of GDL and MPL is also discussed. From the perspective of the real spatially variable properties of GDL and MPL, this research provides a new approach to explore the influence mechanism of MPL.
机译：作为提供反应物和水路路径的关键部件，广泛研究了气体扩散层（GDL）和微多孔层（MPL）对质子交换膜燃料电池（PEMFC）的性能的影响。然而，作为非均匀的多孔介质，考虑GDL和MPL的真实可变性质的研究实际上是不充分的。为了探讨MPL对PEMFC性能和水管理的真实空间可变性质的作用，开发了一种三维多相模型，其耦合催化剂层附聚子模型。发现GDL和MPL的均匀介质假设可能会夸大燃料电池在输出电压高于0.5V时的性能，尤其是在高入口相对湿度（RH）下。此外，空间可变性质导致液态水的不均匀分布，GDL中间或侧面存在一些饱和峰。最后，还讨论了InletRh RH在不同类型的GDL和MPL下的影响。从GDL和MPL的真实空间变量性质的角度来看，该研究提供了一种探讨MPL影响机制的新方法。

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  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第10期|121592.1-121592.13|共13页
  • 作者

    Xiaoqing Zhang; Xiao Ma; Shijin Shuai; Yanzhou Qin; Jiapei Yang;

  • 作者单位

    State Key Laboratory of Automotive Safety and Energy School of Vehicle and Mobility Tsinghua University Beijing 100084 China;

    State Key Laboratory of Automotive Safety and Energy School of Vehicle and Mobility Tsinghua University Beijing 100084 China;

    State Key Laboratory of Automotive Safety and Energy School of Vehicle and Mobility Tsinghua University Beijing 100084 China;

    State Key Laboratory of Engines Tianjin University Tianjin 300350 China;

    State Key Laboratory of Automotive Safety and Energy School of Vehicle and Mobility Tsinghua University Beijing 100084 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Micro-porous layer; Proton exchange membrane fuel cells; Spatially variable properties; Water management;

    机译：微多孔层;质子交换膜燃料电池;空间可变性质;水管理;

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