A parametric study on the deformation of gas diffusion layer in PEM fuel cell

Lee, Tae Hyun; Yang, Chulho

doi:10.1007/s12206-019-1227-8

Cited by 21 publications

(8 citation statements)

References 25 publications

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“…Similar to the cold start models, while various models have been proposed for GDL deformation under heterogenous compression and its impact on overall cell performance [89,99,167], relatively few attempts have been paid to develop models from a degradation perspective. Poornesh et al [87] reported a mechanical model for both the CL and GDL which can predict the flexural strength of the GDL.…”

Section: Mechanistic Modelsmentioning

confidence: 99%

Gas diffusion layer degradation in proton exchange membrane fuel cells: Mechanisms, characterization techniques and modelling approaches

Pan

Wang

Brandon

2021

Journal of Power Sources

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Section: Mechanistic Modelsmentioning

confidence: 99%

Gas diffusion layer degradation in proton exchange membrane fuel cells: Mechanisms, characterization techniques and modelling approaches

Pan

Wang

Brandon

2021

Journal of Power Sources

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“…In their research, piecewise polynomial fitting method was used to describe the nonlinear mechanical behavior of GDL. Recently, Lee and Yang [30] studied channel intrusion, stress, and contact pressure distribution with different membrane material models and a nonlinear orthotropic GDL material model. The same mathematical expression as García-Salaberri et al was employed for elastic modulus in through-plane direction (E z ) of GDL in their work.…”

Section: Two-dimensional Geometrymentioning

confidence: 99%

“…GDL was assumed to have the same mechanical properties, such as elastic modulus, shear modulus, and Poisson's ratio in compression as well as tension, which might occur during numerical calculation of the assembly process [16,30].…”

Section: Assumptionsmentioning

confidence: 99%

The influences of gas diffusion layer material models and parameters on mechanical analysis of proton exchange membrane fuel cell

et al. 2021

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The deformation of gas diffusion layer (GDL) under compacting pressure has a close relationship with transport properties, and electrical and thermal conductivity of proton exchange membrane fuel cell (PEMFC). In this paper, two kinds of GDL material models with different material parameters are studied with the finite element method (FEM). Taguchi orthogonal experiments and analysis of variance (ANOVA) are performed to determine their effects on mechanical analysis of GDL deformation in PEMFC. Finally, the effects of material parameters on GDL diffusion and electrical performance are discussed. The results reveal that elastic modulus (E) is the only factor affecting the maximum displacement for GDL with isotropic model when the Poisson's ratio (ν) is in the range of 0–0.1. For orthotropic model, the through‐plane elastic modulus (Ez) has a great impact on both the deformation and contact pressure. In‐plane elastic modulus (Ex) and through‐plane shear modulus (Gxz) have significant influences on contact pressure. Ez has a great impact on diffusion and electrical performance of GDL, while the effects of Ex, Gxz and ν are negligible. In addition, orthotropic GDL material model and the parameters utilized are effective in analyzing the deformation of GDL.

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“…The mechanical properties of GDL under cyclic loading were studied by Meng et al [ 31 ], and a non-linear intrinsic model describing the compression properties was proposed. Macro-scale models have also been developed by some scholars to study the effect of GDL compression on the transport processes within PEMFC [ 32 , 33 , 34 , 35 ]. Zhang et al [ 32 ] developed a comprehensive two-dimensional two-phase PEMFC model coupling solid mechanics, heat and mass transfer, and electrochemical reactions and investigated the effects of GDL deformation on coupled heat and mass transfer and liquid water distribution.…”

Section: Introductionmentioning

confidence: 99%

Effects of Compression and Porosity Gradients on Two-Phase Behavior in Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells

et al. 2023

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Water management within the gas diffusion layer (GDL) plays an important role in the performance of the proton exchange membrane fuel cell (PEMFC) and its reliability. The compression of the gas diffusion layer during fabrication and assembly has a significant impact on the mass transport, and the porosity gradient design of the gas diffusion layer is an essential way to improve water management. In this paper, the two-dimensional lattice Boltzmann method (LBM) is applied to investigate the two-phase behavior in gas diffusion layers with different porosity gradients under compression. Compression results in an increase in flow resistance below the ribs, prompting the appearance of the flow path of liquid water below the channel, and liquid water breaks through to the channel more quickly. GDLs with linear, multilayer, and inverted V-shaped porosity distributions with an overall porosity of 0.78 are generated to evaluate the effect of porosity gradients on the liquid water transport. The liquid water saturation values within the linear and multilayer GDLs are significantly reduced compared to that of the GDL with uniform porosity, but the liquid water within the inverted V-shaped GDL accumulates in the middle region and is more likely to cause flooding.

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A parametric study on the deformation of gas diffusion layer in PEM fuel cell

Cited by 21 publications

References 25 publications

Gas diffusion layer degradation in proton exchange membrane fuel cells: Mechanisms, characterization techniques and modelling approaches

Gas diffusion layer degradation in proton exchange membrane fuel cells: Mechanisms, characterization techniques and modelling approaches

The influences of gas diffusion layer material models and parameters on mechanical analysis of proton exchange membrane fuel cell

Effects of Compression and Porosity Gradients on Two-Phase Behavior in Gas Diffusion Layer of Proton Exchange Membrane Fuel Cells

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