Publication type: Conference paper
Type of review: Not specified
Title: Model-based analysis of the current interrupt technique for the characterisation of porous gas diffusion electrodes in PEM fuel cells
Authors: Gerteisen, Dietmar
Hakenjos, Alexander
Schumacher, Jürgen
Conference details: Fuel Cell Forum, Lucerne, 4-8 July 2005
Issue Date: 2005
Publisher / Ed. Institution: European Fuel Cell Forum
Language: English
Subjects: Fuel cells; Current interrupt; Simulation
Subject (DDC): 621.3: Electrical engineering and electronics
Abstract: This paper presents a one-dimensional model of the PEM fuel cell cathode for analysing current interrupt (CI) measurements. The porous gas diffusion electrode is assumed to consist of a network of dispersed catalyst (Pt/C) forming spherically shaped agglomerated zones that are filled with electrolyte. The current interrupt technique is used to separate different processes on different time scales that are responsible for the fuel cell dynamic. By means of this agglomerate model the influence of model parameters like double-layer capacity, Tafel slope, diffusion coefficient and ohmic resistance on the potential relaxation are investigated and explanations are given for the characteristic dynamic behaviour of a CI measurement.
Fulltext version: Published version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Appears in Collections:Publikationen School of Engineering

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