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Single- and Double-Sided Coated Gas Diffusion Layers Used in Polymer Electrolyte Fuel Cells: A Numerical Study

Okereke, Isaac C.; Ismail, Mohammed S.; Ingham, Derek B.; Hughes, Kevin; Ma, Lin; Pourkashanian, Mohamed

Authors

Isaac C. Okereke

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Dr Mohammed Ismail m.s.ismail@hull.ac.uk
Lecturer in Chemical Engineering - Hydrogen and Fuel Cell Technologies

Derek B. Ingham

Kevin Hughes

Lin Ma

Mohamed Pourkashanian



Abstract

A new three-dimensional numerical model of a polymer electrolyte fuel cell (PEFC) with a single straight channel was developed to primarily investigate the important impact of the double-sided microporous layer (MPL) coating on the overall performance of the fuel cell and the distribution of the current and the oxygen concentration within the cathode gas diffusion layers (GDLs). Realistic experimentally estimated interfacial contact resistance values between the gas diffusion layer and each of the bipolar plates and the catalyst layer values were incorporated into the model, and parametric studies were performed. The results showed that the double-sided MPL coating could significantly improve the fuel cell performance by up to 30%. Additionally, it was shown that the neglect of the contact resistance between the MPL and the catalyst layer could overestimate the fuel cell performance by up to 6%. In addition, the results showed that the fuel cell performance and the distribution of the current and oxygen are more sensitive to the porosity of the MPL facing the bipolar plate than the porosity of the MPL facing the catalyst layer. All the above results are presented and critically discussed in detail.

Citation

Okereke, I. C., Ismail, M. S., Ingham, D. B., Hughes, K., Ma, L., & Pourkashanian, M. (2023). Single- and Double-Sided Coated Gas Diffusion Layers Used in Polymer Electrolyte Fuel Cells: A Numerical Study. Energies, 16(11), Article 4363. https://doi.org/10.3390/en16114363

Journal Article Type Article
Acceptance Date May 22, 2023
Online Publication Date May 27, 2023
Publication Date Jun 1, 2023
Deposit Date Jul 17, 2023
Publicly Available Date Jul 17, 2023
Journal Energies
Electronic ISSN 1996-1073
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 16
Issue 11
Article Number 4363
DOI https://doi.org/10.3390/en16114363
Keywords Polymer electrolyte fuel cells; Gas diffusion layers; Microporous layer; Double-sided coating; Contact resistance; Porosity
Public URL https://hull-repository.worktribe.com/output/4335099

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