Spatially resolved diagnostic methods for polymer electrolyte fuel cells: a review

Kalyvas, Christos; Kucernak, Anthony; Brett, Dan J. L.; Hinds, Gareth; Atkins, Stephen; Brandon, Nigel P.

doi:10.1002/wene.86

Cited by 20 publications

(14 citation statements)

References 104 publications

(99 reference statements)

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“…One point raised by Lopes et al concerns the contribution of secondary flows, in the form of vortices, to the distribution of reactants in the catalyst layer, as have been previously suggested using laser Doppler anemometry in an operating fuel cell [32]. the MPS, which is consistent to previous results [7].…”

Section: Implications For An Actual Fuel Cellsupporting

confidence: 80%

Investigation of convective transport in the gas diffusion layer used in polymer electrolyte fuel cells

et al. 2017

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Recent experimental data on a fuel cell-like system revealed insights on the fluid flow in both free and porous media. A computational model is used to investigate the momentum and species transport in such system, solved using the finite elements method. The model consists of a stationary, isothermal, diluted species transport in free and porous media flow. The momentum transport is treated using different formulations, namely Stokes-Darcy, Darcy-Brinkman, and a hybrid StokesBrinkman formulations. The species transport is given by the advection equation for a reactant diluted in air. The formulations are compared to each other and to the available experimental data, where it is concluded that the Darcy-Brinkman formulation reproduces the data appropriately. The validated model is used to investigate the contribution of convection in reactant transport in porous media of fuel cells. Convective transport provides a major contribution to reactant distribution in the so-called diffusion media. For a serpentine channel and flow with Re = 260 to 590, convection accounts for 29 to 58% of total reactant transport to the catalyst

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Section: Implications For An Actual Fuel Cellsupporting

confidence: 80%

Investigation of convective transport in the gas diffusion layer used in polymer electrolyte fuel cells

et al. 2017

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“…These tools are relevant in conjunction with stability studies as they allow a precise quantification of the impact of operating "abnormalities" (in terms of local electrode potential), e.g., reverse current decay mechanism, fuel starvation, water flooding, temperature and relative humidity fluctuations. [80] All these technical solutions rely on placing reference electrodes in crucial locations of the MEA. For instance, Hinds et al [81] utilized an improved reference electrode to map the potential variation across the MEA during start-up/shut-down events.…”

Section: Supplementary In Situ Toolsmentioning

confidence: 99%

Experimental Methodologies to Understand Degradation of Nanostructured Electrocatalysts for PEM Fuel Cells: Advances and Opportunities

et al. 2016

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The development and application of advanced experimental tools is a major driving force in modern electrocatalysis. This is particularly true for stability studies with nanostructured oxygen reduction reaction electrocatalysts for PEM fuel cells. Indeed, our understanding of the catalyst degradation mechanisms could not have been achieved without the arsenal of analytical tools developed over the last decades. This contribution aims at highlighting the value of such a multi-faceted analytical toolbox. Several classes are examined: from techniques applied for dissolution studies with bulk electrodes, to ex situ and in situ investigations with model high-surface-area catalysts. Finally, electrochemical and imaging methods employed to characterize catalyst layers are presented. The respective features, advantages, problems and possible future developments are discussed

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“…automobile, aerospace, portable) and stationary applications (e.g. micro combined heat and power generation for residential use [3][4][5]) due to their high efficiency, their low weight and their lower operating temperature (usually between 60 and 80°C [6]). A PEFC is an electrochemical device, as shown in Figure 1, which converts chemical energy from oxygen and hydrogen directly into electrical energy.…”

Section: Introductionmentioning

confidence: 99%

Effects of mechanical compression on the performance of polymer electrolyte fuel cells and analysis through in-situ characterisation techniques - A review

Khetabi

Bouziane

Zamel

et al. 2019

Journal of Power Sources

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One of the factors that affect the polymer electrolyte fuel cell (PEFC) performance is the mechanical compression inside the stack. Although this compression plays an important role to ensure efficient gas sealing along with optimised electrical and thermal conductivities during PEFCs operation, excessive mechanical pressure may worsen the fuel cell performance through reducing the porosity and transport ability of PEFC components. In the last few years, intensive research studies have focused on the gas diffusion layers (GDLs) due to the strong relation of their compressibility with the performance of the PEFCs. A few review papers investigating the compression effect on individual fuel cell components have already been published. However, the evaluation of this effect on an operating PEFC has rarely been reviewed. This paper covers a comprehensive overview of the studies that have focused on the relationship between mechanical compression and the observed performance of a PEFC operating in real life conditions (in-situ). In this study, the effects of GDL properties with respect to the applied mechanical compression and the operating conditions are investigated. Much more work in literature has focused on GDL properties. Thus, an extended discussion is dedicated to this cell element in this paper.

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Spatially resolved diagnostic methods for polymer electrolyte fuel cells: a review

Cited by 20 publications

References 104 publications

Investigation of convective transport in the gas diffusion layer used in polymer electrolyte fuel cells

Investigation of convective transport in the gas diffusion layer used in polymer electrolyte fuel cells

Experimental Methodologies to Understand Degradation of Nanostructured Electrocatalysts for PEM Fuel Cells: Advances and Opportunities

Effects of mechanical compression on the performance of polymer electrolyte fuel cells and analysis through in-situ characterisation techniques - A review

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