Effects of impurities in the cathode airflow on proton exchange membrane fuel cell stacks

IF 2.6 4区工程技术 Q3 ELECTROCHEMISTRY

Fuel Cells Pub Date : 2022-12-08 DOI:10.1002/fuce.202200063

Michael A. Schmid, Tim Wagner, Benjamin Wiedemann, Joachim Scholta

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引用次数: 2

Abstract

Fuel cells for mobile applications obtain their oxygen from the ambient air in road traffic. This air has contaminations of various impurities that can have negative effects on the lifetime of fuel cell systems in vehicles. The identified most relevant contaminants are toluene, nitrogen dioxide, ammonia, and sulfur dioxide. A modified test bench enables different dosages of the above-mentioned pollutant gas concentrations on the cathode side. We examined influences both in static cycles for quasi-steady states and in dynamic cycles for rapid load changes to examine reversible and irreversible degradation effects. We showed that the harmful cathode gases examined could lead to a shortening of the service life of fuel cells. Whereas this is well known for higher concentrations of pollutants, this contribution provides data in the sub-ppm range – including the effects of gas mixtures – for which literature data is still limited.

Additionally, a physical fuel cell model is developed to analyze the effects of various contaminants. The overall intention is to determine acceptable contamination levels and thereby increase the lifetime of fuel cells with the help of simulations. The presented model allows for the computation of cell voltage dependent on cathode side media conditions.

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阴极气流中杂质对质子交换膜燃料电池堆的影响

用于移动应用的燃料电池从道路交通中的环境空气中获得氧气。这种空气中含有各种杂质，这些杂质会对车辆中燃料电池系统的寿命产生负面影响。已确定的最相关的污染物是甲苯、二氧化氮、氨和二氧化硫。改进的试验台能够在阴极侧实现上述污染物气体浓度的不同剂量。我们研究了准稳态的静态循环和快速负载变化的动态循环中的影响，以检验可逆和不可逆的退化效应。我们发现，检查的有害阴极气体可能会缩短燃料电池的使用寿命。尽管这是众所周知的高浓度污染物，但这一贡献提供了亚ppm范围的数据，包括气体混合物的影响，而文献数据仍然有限。

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.