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Elucidating the Mass Transportation Behavior of Gas Diffusion Layers via a H(2) Limiting Current Test
The gas diffusion layer (GDL), as a key component of proton exchange membrane fuel cells (PEMFCs), plays a crucial role in PEMFC’s polarization performance, particularly in mass transport properties at high current densities. To elucidate the correlation between GDLs’ structure and their mass transp...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10456699/ https://www.ncbi.nlm.nih.gov/pubmed/37629961 http://dx.doi.org/10.3390/ma16165670 |
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author | Wang, Min Zhao, Wei Kong, Shuhan Chen, Juntao Li, Yunfei Liu, Mengqi Wu, Mingbo Wang, Guanxiong |
author_facet | Wang, Min Zhao, Wei Kong, Shuhan Chen, Juntao Li, Yunfei Liu, Mengqi Wu, Mingbo Wang, Guanxiong |
author_sort | Wang, Min |
collection | PubMed |
description | The gas diffusion layer (GDL), as a key component of proton exchange membrane fuel cells (PEMFCs), plays a crucial role in PEMFC’s polarization performance, particularly in mass transport properties at high current densities. To elucidate the correlation between GDLs’ structure and their mass transport properties, a limiting current test with the H(2) molecular probe was established and employed to investigate three representative GDLs with and without the microporous layer (MPL). By varying humidity and back pressure, the mass transport resistance of three GDLs was measured in an operating fuel cell, and an elaborate analysis of H(2) transport was conducted. The results showed that the transport resistance (R(DM)) of GDLs was affected by the thickness and pore size distribution of the macroporous substrate (MPS) and the MPL. In the process of gas transport, the smaller pore size and thicker MPL increase the force of gas on the pore wall, resulting in an increase in transmission resistance. Through further calculation and analysis, the total transport resistance can be divided into pressure-related resistance (R(P)) and pressure-independent resistance (R(NP)). R(P) mainly originates from the transport resistance in both MPLs and the substrate layers of GDLs, exhibiting a linear relationship to the pressure; R(NP) mainly originates from the transport resistance in the MPLs. 29BC with thick MPL shows the largest R(NP), and T060 without MPL shows the R(NP) = 0. This methodology enables in situ measurements of mass transport resistances for gas diffusion media, which can be easily applied for developing and deploying PEMFCs. |
format | Online Article Text |
id | pubmed-10456699 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-104566992023-08-26 Elucidating the Mass Transportation Behavior of Gas Diffusion Layers via a H(2) Limiting Current Test Wang, Min Zhao, Wei Kong, Shuhan Chen, Juntao Li, Yunfei Liu, Mengqi Wu, Mingbo Wang, Guanxiong Materials (Basel) Article The gas diffusion layer (GDL), as a key component of proton exchange membrane fuel cells (PEMFCs), plays a crucial role in PEMFC’s polarization performance, particularly in mass transport properties at high current densities. To elucidate the correlation between GDLs’ structure and their mass transport properties, a limiting current test with the H(2) molecular probe was established and employed to investigate three representative GDLs with and without the microporous layer (MPL). By varying humidity and back pressure, the mass transport resistance of three GDLs was measured in an operating fuel cell, and an elaborate analysis of H(2) transport was conducted. The results showed that the transport resistance (R(DM)) of GDLs was affected by the thickness and pore size distribution of the macroporous substrate (MPS) and the MPL. In the process of gas transport, the smaller pore size and thicker MPL increase the force of gas on the pore wall, resulting in an increase in transmission resistance. Through further calculation and analysis, the total transport resistance can be divided into pressure-related resistance (R(P)) and pressure-independent resistance (R(NP)). R(P) mainly originates from the transport resistance in both MPLs and the substrate layers of GDLs, exhibiting a linear relationship to the pressure; R(NP) mainly originates from the transport resistance in the MPLs. 29BC with thick MPL shows the largest R(NP), and T060 without MPL shows the R(NP) = 0. This methodology enables in situ measurements of mass transport resistances for gas diffusion media, which can be easily applied for developing and deploying PEMFCs. MDPI 2023-08-17 /pmc/articles/PMC10456699/ /pubmed/37629961 http://dx.doi.org/10.3390/ma16165670 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Wang, Min Zhao, Wei Kong, Shuhan Chen, Juntao Li, Yunfei Liu, Mengqi Wu, Mingbo Wang, Guanxiong Elucidating the Mass Transportation Behavior of Gas Diffusion Layers via a H(2) Limiting Current Test |
title | Elucidating the Mass Transportation Behavior of Gas Diffusion Layers via a H(2) Limiting Current Test |
title_full | Elucidating the Mass Transportation Behavior of Gas Diffusion Layers via a H(2) Limiting Current Test |
title_fullStr | Elucidating the Mass Transportation Behavior of Gas Diffusion Layers via a H(2) Limiting Current Test |
title_full_unstemmed | Elucidating the Mass Transportation Behavior of Gas Diffusion Layers via a H(2) Limiting Current Test |
title_short | Elucidating the Mass Transportation Behavior of Gas Diffusion Layers via a H(2) Limiting Current Test |
title_sort | elucidating the mass transportation behavior of gas diffusion layers via a h(2) limiting current test |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10456699/ https://www.ncbi.nlm.nih.gov/pubmed/37629961 http://dx.doi.org/10.3390/ma16165670 |
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