Modeling of Catalyst Degradation in Polymer Electrolyte Membrane Fuel Cells Applied to Three-Dimensional Computational Fluid Dynamics Simulation

IF 2.6 4区 工程技术 Q3 ELECTROCHEMISTRY Fuel Cells Pub Date : 2024-10-14 DOI:10.1002/fuce.202300237
Clemens Fink, Joel Mata Edjokola, Marijo Telenta, Merit Bodner
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Abstract

In a polymer electrolyte membrane (PEM) fuel cell, the following degradation mechanisms are associated with the catalyst particles and their support: carbon support corrosion triggered by carbon and platinum oxidation, platinum dissolution with redeposition, and particle detachment with agglomeration. In this work, an electrochemical model for those degradation effects is presented as well as its coupling with a three-dimensional computational fluid dynamics PEM fuel cell performance model. The overall model is used to calculate polarization curves and current density distributions of a PEM fuel cell in a fresh and aged state as well as the degradation process during an accelerated stress test with 30 000 voltage cycles. The obtained simulation results are compared to measurements on a three-serpentine channel PEM fuel cell with an active area of 25 cm2 under various temperatures and humidities. The experimental data are obtained with a segmented test cell using respective degradation protocols and test conditions proposed by the United States Department of Energy. In addition to the temperature and humidity changes, the influence of geometry and material parameters on the degree of degradation and the resulting fuel cell performance is explored in detail.

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聚合物电解质膜燃料电池催化剂降解建模应用于三维计算流体动力学模拟
在聚合物电解质膜(PEM)燃料电池中,以下降解机制与催化剂颗粒及其支撑物有关:碳和铂氧化引发的碳支撑物腐蚀、铂溶解并重新沉积以及颗粒脱落并聚集。在这项工作中,介绍了一个针对这些降解效应的电化学模型,以及该模型与三维计算流体动力学 PEM 燃料电池性能模型的耦合。整个模型用于计算 PEM 燃料电池在新鲜和老化状态下的极化曲线和电流密度分布,以及在 30 000 次电压循环的加速应力测试中的降解过程。模拟结果与在不同温度和湿度条件下对活性面积为 25 平方厘米的三蛇形通道 PEM 燃料电池的测量结果进行了比较。实验数据是采用美国能源部提出的相应降解协议和测试条件,通过分段测试电池获得的。除温度和湿度变化外,还详细探讨了几何形状和材料参数对降解程度以及由此产生的燃料电池性能的影响。
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来源期刊
Fuel Cells
Fuel Cells 工程技术-电化学
CiteScore
5.80
自引率
3.60%
发文量
31
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.
期刊最新文献
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