Effect of inhomogeneous compression of gas diffusion layer on the performance of PEMFC with interdigitated flow field

Mahmoudi, Ahmed; Ramiar, Abas; Esmaili, Qadir

doi:10.1016/j.enconman.2015.12.012

Cited by 66 publications

(17 citation statements)

References 41 publications

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“…Additionally, this technique has been used for studying crack formation in the catalyst layer as well as the membrane degradation mechanisms, such as membrane pinning [31][32][33][34][35][36]. X-ray CT, used in conjunction with computational modelling, has expanded the understanding of crucial processes taking place inside fuel cells [28,[37][38][39][40][41][42][43]. The technique has been particularly useful for examining the effect of compression on PEMFCs, but the majority of studies have focused on the GDL under even compression [22,25,29,31,44], and ignore the effect of compression on other layers of the MEA that play a critical role in the fuel cell performance.…”

Section: Introductionmentioning

confidence: 99%

The effect of non-uniform compression and flow-field arrangements on membrane electrode assemblies - X-ray computed tomography characterisation and effective parameter determination

Kulkarni

Kok

Jervis

et al. 2019

Journal of Power Sources

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The performance of the of polymer electrolyte membrane (PEM) fuel cell is governed by a complex interaction of the structure of the membrane electrode assembly (MEA), cell compression, and operating parameters. Adequate cell compression for improved current collection and gas sealing, can structurally deform MEA with adverse consequences. Nonuniform MEA compression exerted by the flow-field design and arrangement induces heterogeneous transport properties. Hence, understanding morphological evolution and effective transport properties as an effect of MEA compression is an important factor for improving fuel cell performance and durability. In this paper, an X-ray computed tomography study of the entire MEA compression is presented, comprising of gas diffusion and microporous layers, catalyst layers, and the electrolyte membrane, subjected to non-uniform compression under two distinct flow-field arrangements. This study presents a comprehensive dataset of the heterogeneous effective properties required for robust computational modelling; including porosity, permeability, tortuosity, and diffusivity, along with the extent of blocking of the flow channel due to cell compression and effect of compression on the structural properties of the membrane.

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Section: Introductionmentioning

confidence: 99%

The effect of non-uniform compression and flow-field arrangements on membrane electrode assemblies - X-ray computed tomography characterisation and effective parameter determination

Kulkarni

Kok

Jervis

et al. 2019

Journal of Power Sources

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“…From another point of view, Liu et al [5] attempted to optimize the assembly force of the DMFCs by investigate the internal resistance and performance of the fuel cell at different values of that force. Similarly, Mahmoudi et al [6] proved numerically that, the cell performance and limiting current density increased as the gas diffusion layer compression increased due to the enhancement of the under rib flow. One of the main components of the fuel cell which has a direct effect on the mass transfer characteristics and the electronic conductivity is the flow field.…”

Section: Introductionmentioning

confidence: 94%

Efficient fuel utilization by enhancing the under-rib mass transport using new serpentine flow field designs of direct methanol fuel cells

El-Zoheiry

Ookawara

Ahmed

2017

Energy Conversion and Management

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“…In order to achieve this ideal GDL state, the proper assembly force is necessary. 19 The assembly force makes the gas diffusion layer deformed, reduces the porosity of the diffusion layer, and hinders mass transfer. 20 At the same time, it also has a great impact on the contact impedance of the fuel cell.…”

Section: Introductionmentioning

confidence: 99%

Combination effects of flow field structure and assembly force on performance of high temperature proton exchange membrane fuel cells

Zhang

et al. 2021

Int J Energy Res

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In this work, a three-dimensional, steady state model was developed by combining mechanical equations, Navier-stokes equation, Maxwell-Stefan equation, and Butler-Volmer equation. This model was used to investigate the influences of flow field structure and assembly force on porosity distribution in gas diffusion layer (GDL), species distribution in GDL, and current density distribution in GDL and membrane by extracting uneven porosity in the GDL from mechanical calculation equation to put in mass transfer calculation and electrochemical calculation equation as the known data. The optimum assembly prestress and optimum flow field structure were achieved. The results show combined effect of the assembly force and flow field makes the uneven porosity distribution and remarkable lateral current in the GDL; the channel width/ rib width ratio of flow field has significant effects on the performance of the high temperature proton exchange membrane fuel cells (HT-PEMFC). These results provide the potential to promote the performance and application of HT-PEMFC.

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Effect of inhomogeneous compression of gas diffusion layer on the performance of PEMFC with interdigitated flow field

Cited by 66 publications

References 41 publications

The effect of non-uniform compression and flow-field arrangements on membrane electrode assemblies - X-ray computed tomography characterisation and effective parameter determination

The effect of non-uniform compression and flow-field arrangements on membrane electrode assemblies - X-ray computed tomography characterisation and effective parameter determination

Efficient fuel utilization by enhancing the under-rib mass transport using new serpentine flow field designs of direct methanol fuel cells

Combination effects of flow field structure and assembly force on performance of high temperature proton exchange membrane fuel cells

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