Investigation of GDL compression effects on the performance of a PEM fuel cell cathode by lattice Boltzmann method

Molaeimanesh, Gholam Reza; Nazemian, M.

doi:10.1016/j.jpowsour.2017.05.078

Cited by 52 publications

(32 citation statements)

References 38 publications

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“…They proved that numerical simulation based on extracted data from tomographic images is a versatile tool for development and characterization of a porous structure. Many recent works in the past decade , stem from original article of Schladitz to reconstruct non‐woven carbon fiber paper GDLs with structural input parameters such as fiber diameter, porosity and anisotropy factor. This method, use an anisotropic parameter which regulates the anisotropy of the GDL.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Reconstruction and Characterization of the Porous GDLs for PEMFC Based on Fibers Orientation Distribution

2018

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The 3D microstructure of the gas diffusion layers (GDLs) is generated, using a stochastic reconstruction approach. The method uses basic input parameters and fibers orientation distribution and is capable to model carbon fiber and binder phases of all types of carbon fiber GDLs with different structural parameters. Morphological operators of image processing are used to add the binder to the fibrous skeleton in three dimensions. Binder impregnation, pore size distribution and tortuosity factor of the reconstructed GDL are evaluated and compared with literature. Twenty and forty percentages of binder volume fraction are used to reconstruct the microstructure. To further investigate the reliability of our approach, mass transport properties of the reconstructed microstructure, namely absolute permeability, effective diffusivity of the pore space and effective thermal conductivity, are investigated through a finite volume equation solver in AVIZO. Only 4% of discrepancy between the absolute permeability calculation and the value reported by the manufacturer is observed in the through‐plane direction. Finally, in order to show the flexibility of the methodology the microstructure of a commercial Toray GDL is also reconstructed and characterized. The proposed method is proved to be a high‐speed and versatile tool for research and development in the GDL material design.

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Section: Introductionmentioning

confidence: 99%

Microstructure Reconstruction and Characterization of the Porous GDLs for PEMFC Based on Fibers Orientation Distribution

2018

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“…The carbon paper GDL is stochastically reconstructed by the procedure presented by Schulz et al. and the effects of compression on the carbon paper microstructure is taken into account by the procedure presented by Molaeimanesh and Nazemian . In order to simulate the droplet removal from the electrode, a 3D LB model based on the Shan and Chen multi‐species multiphase model is developed.…”

Section: Discussionmentioning

confidence: 99%

“…This defect is not desirable for an accurate 3D simulation. Therefore, in this investigation, to consider the effects of compression morphological a more realistic procedure, previously presented by Molaeimanesh and Nazemian is employed in which the cross‐sectional shape of the fibers are not affected by compression. In this procedure, the changes of fibers axes alignment (i.e., the alignment of randomly generated lines described in Sect.…”

Section: Microstructure Reconstruction Of Gdlmentioning

confidence: 99%

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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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“…In recent years, a great amount of research has been focused on increasing the performance [5] and the durability of PEMFC [6], and on decreasing their cost [7]. Numerous studies have focused on the different elements of a FC: membranes [8,9], gas diffusion layers [10][11][12][13][14], catalyst layers [15][16][17][18], and flow fields [19].…”

Section: Introductionmentioning

confidence: 99%

Mechanistic equivalent circuit modelling of a commercial polymer electrolyte membrane fuel cell

Giner-Sanz

Ortega

Pérez-Herranz

2018

Journal of Power Sources

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Electrochemical impedance spectroscopy (EIS) has been widely used in the fuel cell field since it allows deconvolving the different physic-chemical processes that affect the fuel cell performance. Typically, EIS spectra are modelled using electric equivalent circuits. In this work, EIS spectra of an individual cell of a commercial PEM fuel cell stack were obtained experimentally. The goal was to obtain a mechanistic electric equivalent circuit in order to model the experimental EIS spectra. A mechanistic electric equivalent circuit is a semiempirical modelling technique which is based on obtaining an equivalent circuit that does not only correctly fit the experimental spectra, but which elements have a mechanistic physical meaning. In order to obtain the aforementioned electric equivalent circuit, 12 different models with defined physical meanings were proposed. These equivalent circuits were fitted to the obtained EIS spectra. A 2 step selection process was performed. In the first step, a group of 4 circuits were preselected out of the initial list of 12, based on general fitting indicators as the determination coefficient and the fitted parameter uncertainty. In the second step, one of the 4 preselected circuits was 2 selected on account of the consistency of the fitted parameter values with the physical meaning of each parameter.

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Investigation of GDL compression effects on the performance of a PEM fuel cell cathode by lattice Boltzmann method

Cited by 52 publications

References 38 publications

Microstructure Reconstruction and Characterization of the Porous GDLs for PEMFC Based on Fibers Orientation Distribution

Microstructure Reconstruction and Characterization of the Porous GDLs for PEMFC Based on Fibers Orientation Distribution

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

Mechanistic equivalent circuit modelling of a commercial polymer electrolyte membrane fuel cell

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