Study on the Performance Degradation of Membrane Electrode Assembly in Proton Exchange Membrane Fuel Cell Caused by Freeze–Thaw Cycles

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY

Fuel Cells Pub Date : 2024-07-02 DOI:10.1002/fuce.202400059

Zhongyu Gan, Tao Chen, Rufeng Zhang, Ruixuan Zhang

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Abstract

Durability of membrane electrode assembly (MEA) is a serious problem to be overcome in the commercial development of proton exchange membrane fuel cell (PEMFC). The change in volume due to water–ice conversion has an irreversible effect on the MEA, which affects the performance of PEMFC. For investigating the optimal initial water content of MEA that minimizes the impact on PEMFC performance after freeze–thaw (F/T) cycles, this study first measured the high-frequency resistance to determine the water content of MEA, and then subjected five MEAs with different water contents to 60 F/T cycles at −20°C to 30°C. The fuel cell output performance of five MEAs was found to be inconsistently degraded by polarization curve tests, with the cells of the two MEAs with the lowest and highest water contents exhibiting the worst output performance. Electrochemical impedance spectroscopy curves proved that the difference in resistance change after F/T cycles is one reason why the cell output performance is degraded differently. Finally, the degradation of cell performance was further explained by cyclic voltammetry. These results indicate that MEA has the best output performance for F/T cycles at an initial water content of 3.0.

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冻融循环导致质子交换膜燃料电池中膜电极组件性能退化的研究

在质子交换膜燃料电池（PEMFC）的商业开发过程中，膜电极组件（MEA）的耐久性是一个亟待解决的严重问题。水冰转换导致的体积变化会对 MEA 产生不可逆的影响，从而影响 PEMFC 的性能。为了研究 MEA 在冻融循环（F/T）后对 PEMFC 性能影响最小的最佳初始含水量，本研究首先测量了高频电阻以确定 MEA 的含水量，然后将五种不同含水量的 MEA 在 -20°C 至 30°C 下进行 60 次 F/T 循环。通过极化曲线测试发现，五种 MEA 的燃料电池输出性能下降不一致，其中含水量最低和最高的两种 MEA 的电池输出性能最差。电化学阻抗谱曲线证明，F/T 循环后电阻变化的差异是电池输出性能退化不同的原因之一。最后，循环伏安法进一步解释了电池性能退化的原因。这些结果表明，在初始含水量为 3.0 时，MEA 在 F/T 循环中的输出性能最佳。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fuel Cells 工程技术-电化学

CiteScore

5.80

自引率

3.60%

发文量

审稿时长

3.7 months

期刊介绍： This journal is only available online from 2011 onwards. Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables. Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in -chemistry- materials science- physics- chemical engineering- electrical engineering- mechanical engineering- is included. Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies. Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology. Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.

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