Effects of Temperature and Volume Agglomerate Fraction on Mechanical Response of PEMFC Electrodes

Yang Xiao; Chong Du Cho

doi:10.4028/www.scientific.net/AMM.548-549.379

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 548-549Effects of Temperature and Volume Agglomerate...

Effects of Temperature and Volume Agglomerate Fraction on Mechanical Response of PEMFC Electrodes

Abstract:

To deal with the durability analysis of PEM fuel cell, it is necessary to carry out a further understanding of each component response, especially each layer of the MEA. So the main purpose of this paper is to understand the mechanical properties of electrode layer and find out the effect of temperature and the content of catalyst particles on the electrode yield stress. To overcome the experimental limitations, numerical method is used here. A 3-phase model of the electrode is built, which includes a user-defined material with catalyst particles. Due to the porosity of the electrode, the user-defined material is defined as a nafion ionomer glassy constitutive model by bringing in the effect of foam structure. Catalyst agglomerate particles are assumed as isotropic elastic spheres with relatively high Young’s modulus. The yield stress is extracted from the simulation, and the influences of temperature and agglomerate fraction on it are discussed.

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Periodical:

Applied Mechanics and Materials (Volumes 548-549)

Pages:

379-382

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.548-549.379

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Online since:

April 2014

Authors:

Yang Xiao, Chong Du Cho*

Keywords:

MEA, Mechanical Response, Nafion, PEM Fuel Cells, Polymer Mechanics

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* - Corresponding Author

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