The reliable operation of proton exchange membrane(PEM) fuel cells is contingent upon precise hydrothermal management. However, there is a current deficiency in existing research regarding the quantification of the internal hydrothermal state of fuel cells, posing challenges in effective control of fuel cell. This study introduces, for the first time, a novel dimensionless hydrothermal comfort parameter based on a two-dimensional multiphase impedance model of fuel cell. This parameter is designed to comprehensively evaluate the hydrothermal characteristics of fuel cell and to effectively mitigate the issues of cathode flooding and anode membrane drying. The model incorporates an enhanced electrochemical kinetics model capable of accurately reproducing electrochemical impedance spectroscopy(EIS) results under various conditions. Furthermore, this paper conducts a thorough investigation into the impact of membrane electrode assembly(MEA) structural parameters (PEM thickness, catalyst layer thickness and ionomer volume fraction) and operational parameters(temperature, cathode humidity and cathode stoichiometry) on the hydrothermal comfort parameter and critical internal kinetics. These works offer a deeper understanding into the effect of the MEA structural parameters and operating conditions on the hydrothermal characteristics and kinetics of fuel cell, aiding in material optimization and control system design.

中文翻译：

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通过增强阻抗维模型研究多维参数对质子交换膜燃料电池内部水热特性的影响


质子交换膜（PEM）燃料电池的可靠运行取决于精确的水热管理。然而，目前现有研究在燃料电池内部水热状态的量化方面存在不足，给燃料电池的有效控制带来了挑战。这项研究首次引入了一种基于燃料电池二维多相阻抗模型的新型无量纲水热舒适参数。该参数旨在综合评价燃料电池的水热特性，有效缓解阴极液泛和阳极膜干燥问题。该模型采用了增强的电化学动力学模型，能够在各种条件下准确再现电化学阻抗谱 (EIS) 结果。此外，本文还深入研究了膜电极组件（MEA）结构参数（PEM厚度、催化剂层厚度和离聚物体积分数）和操作参数（温度、阴极湿度和阴极化学计量）对水热舒适度参数和性能的影响。临界内部动力学。这些工作使人们更深入地了解 MEA 结构参数和运行条件对燃料电池水热特性和动力学的影响，有助于材料优化和控制系统设计。