测量机械压缩下气体扩散层电阻的方法

IF 2.6 4区 工程技术 Q3 ELECTROCHEMISTRY
Fuel Cells Pub Date : 2024-06-26 DOI:10.1002/fuce.202200102
Khadidja Bouziane, E. M. Khetabi, R. Lachat, D. Candusso, Y. Meyer
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引用次数: 0

摘要

在质子交换膜燃料电池(FC)中,气体扩散层(GDL)被认为是受机械压缩影响最大的部件。本文重点介绍了测量 GDL 在压缩条件下的三个主要电气参数--接触电阻、通面电阻和面内电阻的方法。在压缩过程中,这些电阻通常会出现非线性下降。尤其是在 0 到 2 兆帕之间,会出现明显的下降,超过 2 兆帕之后,下降幅度会减小。石墨化直碳纸的接触电阻和平面电阻最小,分析压缩下的 GDL 电阻为解释 FC 中的欧姆损耗提供了第一种方法,因为这些损耗的很大一部分与 GDL 有关。这篇综述将有助于研究人员更好地理解欧姆损耗,并建立一个主要 GDL 电阻及其随几个操作参数变化的数据库。这些数据可用于设计模型,以优化 GDL 性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Methods to Measure the Electrical Resistances of a Gas Diffusion Layer Under Mechanical Compression

Methods to Measure the Electrical Resistances of a Gas Diffusion Layer Under Mechanical Compression

In a proton exchange membrane fuel cell (FC), the gas diffusion layer (GDL) is identified as the component that is most affected by mechanical compression. In this article, a particular focus is provided on the methods to measure the three main electrical parameters—contact resistance, through-plane resistance, and in-plane resistance—of the GDL under compression. A nonlinear decrease of these resistances under compression is typically observed. In particular, an important decrease is observed from 0 to 2 MPa, then a lower one above 2 MPa. The smallest contact and in-plane resistances are measured for the graphitized straight carbon papers analyzing GDL resistances under compression gives a first approach to explaining ohmic losses in FCs as a large part of these losses is related to the GDL. This review would be helpful for researchers in better understanding ohmic losses and establishing a database of main GDL electrical resistances and their variations according to several operating parameters. These data could be used in design models to optimize GDL properties.

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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.
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