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Article Dans Une Revue Fuel Cells Année : 2024

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

Résumé

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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hal-04629747 , version 1 (09-07-2024)

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Khadidja Bouziane, El Mahdi Khetabi, Rémy Lachat, Denis Candusso, Yann Meyer. Methods to Measure the Electrical Resistances of a Gas Diffusion Layer Under Mechanical Compression. Fuel Cells, 2024, 24 (3), pp.e202200102. ⟨10.1002/fuce.202200102⟩. ⟨hal-04629747⟩
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