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Pore-scale study of two-phase flow in the gas diffusion layer of proton exchange membrane fuel cells : The impact of polytetrafluoroethylene content and gradient distribution

Li, Shian LU ; Chen, Pengyu ; Shen, Qiuwan LU ; Zhang, Shuqian ; Liao, Jiadong ; Jiang, Ziheng ; Gao, Pengyun and Andersson, Martin LU (2024) In Materials Today Communications 39.
Abstract

The polytetrafluoroethylene (PTFE) is commonly used to improve the hydrophobic of the gas diffusion layer (GDL). In this study, impacts of PTFE content and piecewise/linear gradient distributions on the transport behavior of liquid water were numerically studied by using a multiphase lattice Boltzmann method. A two-dimensional microstructure of the GDL was reconstructed by stochastic algorithm. The two-phase flow in the GDLs with PTFE contents of 0, 10, 20, 30 and 40 wt% were evaluated and compared. The liquid water transport process can be greatly affected by the PTFE content and the best water drainage performance was provided by the GDL with PTFE content of 30 wt%. Subsequently, the GDLs with PTFE piecewise/linear gradient... (More)

The polytetrafluoroethylene (PTFE) is commonly used to improve the hydrophobic of the gas diffusion layer (GDL). In this study, impacts of PTFE content and piecewise/linear gradient distributions on the transport behavior of liquid water were numerically studied by using a multiphase lattice Boltzmann method. A two-dimensional microstructure of the GDL was reconstructed by stochastic algorithm. The two-phase flow in the GDLs with PTFE contents of 0, 10, 20, 30 and 40 wt% were evaluated and compared. The liquid water transport process can be greatly affected by the PTFE content and the best water drainage performance was provided by the GDL with PTFE content of 30 wt%. Subsequently, the GDLs with PTFE piecewise/linear gradient distributions were designed and investigated. It was found that the water drainage performance can be further improved when the PTFE content is well distributed. This study can provide guidelines for design of GDL for high performance proton exchange membrane fuel cells.

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author
; ; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
GDL, Lattice Boltzmann method, PTFE gradient distribution, Water drainage performance
in
Materials Today Communications
volume
39
article number
108773
publisher
Elsevier
external identifiers
  • scopus:85189481030
ISSN
2352-4928
DOI
10.1016/j.mtcomm.2024.108773
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2024 Elsevier Ltd
id
7afef1ae-6f2d-405a-aac9-66d42a5c0027
date added to LUP
2024-04-18 16:13:22
date last changed
2024-04-22 14:40:11
@article{7afef1ae-6f2d-405a-aac9-66d42a5c0027,
  abstract     = {{<p>The polytetrafluoroethylene (PTFE) is commonly used to improve the hydrophobic of the gas diffusion layer (GDL). In this study, impacts of PTFE content and piecewise/linear gradient distributions on the transport behavior of liquid water were numerically studied by using a multiphase lattice Boltzmann method. A two-dimensional microstructure of the GDL was reconstructed by stochastic algorithm. The two-phase flow in the GDLs with PTFE contents of 0, 10, 20, 30 and 40 wt% were evaluated and compared. The liquid water transport process can be greatly affected by the PTFE content and the best water drainage performance was provided by the GDL with PTFE content of 30 wt%. Subsequently, the GDLs with PTFE piecewise/linear gradient distributions were designed and investigated. It was found that the water drainage performance can be further improved when the PTFE content is well distributed. This study can provide guidelines for design of GDL for high performance proton exchange membrane fuel cells.</p>}},
  author       = {{Li, Shian and Chen, Pengyu and Shen, Qiuwan and Zhang, Shuqian and Liao, Jiadong and Jiang, Ziheng and Gao, Pengyun and Andersson, Martin}},
  issn         = {{2352-4928}},
  keywords     = {{GDL; Lattice Boltzmann method; PTFE gradient distribution; Water drainage performance}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Materials Today Communications}},
  title        = {{Pore-scale study of two-phase flow in the gas diffusion layer of proton exchange membrane fuel cells : The impact of polytetrafluoroethylene content and gradient distribution}},
  url          = {{http://dx.doi.org/10.1016/j.mtcomm.2024.108773}},
  doi          = {{10.1016/j.mtcomm.2024.108773}},
  volume       = {{39}},
  year         = {{2024}},
}