Effect of compression on water transport in gas diffusion layer of polymer electrolyte membrane fuel cell using lattice Boltzmann method

Jeon, Dong Hyup; Kim, Han-Sang

doi:10.1016/j.jpowsour.2015.06.080

Cited by 82 publications

(40 citation statements)

References 24 publications

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“…The calculation domain is rectangular with dimensions of 2,000 Δx × 700 Δx. The thickness of the GDL is 400 μm , and a 300 μm high gas channel (GC) is added at the top of it. To simulate the GDL in this study, the porosity which equals as 0.88 , and a particle diameter with value of 10 lu were used.…”

Section: Multicomponent Multiphase Lbmmentioning

confidence: 99%

“…As shown in Figure , the solid circular particles are placed randomly in a layer with a thickness of 400 Δ x to generate a GDL. The porosity of the medium is equal to 0.88 , and the particle diameter is 10 lu . In this study, the boundary conditions suggested by Zou and He are applied .…”

Section: Multicomponent Multiphase Lbmmentioning

confidence: 99%

“…The pore areas of the related 2D-GDL are shown in Figure 1. The thickness of the GDL is 400 μm [25,31] and a 300 μm hight gas channel (GC) is added at the top of it. The rectangular calculation domain (2,000 Δx 700 Δx) is presented.…”

Section: Multicomponent Multiphase Lbmmentioning

confidence: 99%

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Tailored Surface Wettability of Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells: Proposing a Pore Scale‐Two Phase Design

2018

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In this study, lattice Boltzmann method (LBM) is used to investigate liquid water transport in a gas diffusion layer (GDL) of polymer electrolyte membrane fuel cells (PEMFC) by considering mixed wettability. The GDL is reconstructed using the stochastic method and the simulations are performed to explore liquid water behaviors in the GDL. In this study, the dynamic behavior of liquid water during removal from gas diffusion layer of a PEMFC electrode is analyzed. The results are related to the water management and the optimal design of the GDL. The effects of inserted hydrophilic layer on the removal process and water distribution are investigated and a wettability‐tailored GDL is proposed. In addition, liquid water dynamic behaviors and liquid water saturation within the GDL in steady state and transient mode are explored. The effects of mixed wettability on the effective clusters in GDL, merging of different clusters and the loops developed by the fingers are investigated in detail. The optimum thickness and optimum location for the inserted hydrophilic layer inside the GDL are also proposed. The results show that combination of hydrophilic layer with the hydrophobic pores leads to an increase in the performance of the PEMFCs. In other words, the water management in GDL can be suitably done by selection of location and thickness of inserted hydrophilic layer. Regarding different test cases, the optimum location of the inserted hydrophilic layer is GDL‐GC interface with the optimum thickness of 12.5% of GDL thickness.

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Section: Multicomponent Multiphase Lbmmentioning

confidence: 99%

Section: Multicomponent Multiphase Lbmmentioning

confidence: 99%

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Tailored Surface Wettability of Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells: Proposing a Pore Scale‐Two Phase Design

2018

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“…In this regard, several investigations about liquid water removal from various homogenously and non‐homogenously compressed GDLs have been conducted , . However, to the best of authors' knowledge, water is considered as a continuous stream in all of these mentioned investigations.…”

Section: Introductionmentioning

confidence: 99%

Effects of Compression on the Removal of Water Droplet from GDLs of PEM Fuel Cells

2019

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Proton-exchange membrane fuel cells (PEMFCs) with a sound potential for employing in the propulsion systems of green vehicles are currently at a high stage of development. However, appropriate water management is crucial for further development of PEMFCs. In the current investigation, the role of gas diffusion layer (GDL) compression and wettability on the removal of a water droplet from different GDLs with dissimilar levels of compression (0%, 15%, 20%, and 25%) and wettability (contact angles of 80°, 105°, and 150°) is inspected by numerous 3D lattice Boltzmann simulations.The results of this study demonstrate that by increasing of compression level, the droplet ejection will be more probable. Besides, for hydrophobic GDLs (i.e., contact angles of 105°a nd 150°) adding compression will help the removal process, regardless of the compression amount. However, for the hydrophilic GDLs (contact angle of 80°) adding compression is not necessarily helpful.

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“…Recent publications present modifications of the models which are able to overcome this limitation [29,30]. This extends the applicability of the method to technical systems like gas diffusion media of polymer electrolyte fuel cells and the number of publications in the field increased rapidly [31][32][33][34][35][36]. However, to our knowledge this is the first publication of pore-scale LBM simulations of gas diffusion electrodes for metal-air batteries.…”

mentioning

confidence: 96%

Characterization of gas diffusion electrodes for metal-air batteries

Danner

Eswara

Schulz

et al. 2016

Journal of Power Sources

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Gas diffusion electrodes are commonly used in high energy density metalair batteries for the supply of oxygen. Hydrophobic binder materials ensure the coexistence of gas and liquid phase in the pore network. The phase distribution has a strong influence on transport processes and electrochemical reactions. In this article we present 2D and 3D Rothman-Keller type multiphase Lattice-Boltzmann models which take into account the hetero- for an efficient development of improved gas diffusion electrodes.

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Effect of compression on water transport in gas diffusion layer of polymer electrolyte membrane fuel cell using lattice Boltzmann method

Cited by 82 publications

References 24 publications

Tailored Surface Wettability of Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells: Proposing a Pore Scale‐Two Phase Design

Tailored Surface Wettability of Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells: Proposing a Pore Scale‐Two Phase Design

Effects of Compression on the Removal of Water Droplet from GDLs of PEM Fuel Cells

Characterization of gas diffusion electrodes for metal-air batteries

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