2004
DOI: 10.1149/1.1648024
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A Steady-State Impedance Model for a PEMFC Cathode

Abstract: A model for the simulation of the steady-state impedance response of a polymer electrolyte membrane fuel cell ͑PEMFC͒ cathode is presented. The catalyst layer of the electrode is assumed to consist of many flooded spherical agglomerate particles surrounded by a small volume fraction of gas pores. Stefan-Maxwell equations are used to describe the multicomponent gas-phase transport occurring in both the gas diffusion layer and the catalyst layer of the electrode. Liquid-phase diffusion of O 2 is assumed to take … Show more

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Cited by 68 publications
(53 citation statements)
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(55 reference statements)
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“…15,40 Since the solid-phase potential is assumed uniform within the particle and using a reference oxygen electrode, the cathode overpotential can be reduced to…”
Section: Kineticsmentioning
confidence: 99%
“…15,40 Since the solid-phase potential is assumed uniform within the particle and using a reference oxygen electrode, the cathode overpotential can be reduced to…”
Section: Kineticsmentioning
confidence: 99%
“…catalyst utilization and performance) than on the understanding of kinetic mechanisms [88]. Many studies investigated phenomena occurring in the active layer, and some attention has been paid to the transport limitation inside the gas diffusion layer [89].…”
Section: Ii2 New Preparation Methods Of Efficient Electrode Catalystsmentioning
confidence: 99%
“…The closest approximation to the structure is one of clumps of carbon grains (agglomerates) coated with and connected by electrolyte, [6,[10][11][12][13][14]. A widely employed approach in modelling the CCL is to assume that the agglomerates are spherical in shape, [6,7,[15][16][17][18][19][20], and to incorporate the agglomerate-level activity into a homogeneous model by assuming that a thin film of electrolyte (or water) introduces a local resistance to the oxygen-motivated by the well-established theory of porous catalysts (see Chapter 3 of [21]). The three main variants are as follows:…”
Section: Introductionmentioning
confidence: 99%
“…• Include internal resistance to the oxygen movement, due to flooding of the agglomerates with electrolyte or liquid water-this yields an effectiveness factor for the oxygen diffusion coefficient, [16,17].…”
Section: Introductionmentioning
confidence: 99%