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Macroscopic properties of solid oxide fuel cell electrodes via microstructure-based numerical homogenization

Abstract

Due to climate change, sustainable and energy-efficient power supply is urgently required. To increase the performance of solid oxide fuel cells, the effects of the microstructure of their porous electrodes need to be studied. Therefore, real tomography images are used to (i) characterize specific geometrical features such as the two-point correlation function or the tortuosity and (ii) determine the effective conductivities (thermal, ionic, electronic) and the effective permeability. The temperature-dependent and anisotropic physical properties based on the first-order homogenization method are described by the dissipation potential. The results can be used in macroscopic fuel cell simulations to bridge the gap between the micro and macro scale and to gain a better understanding of which characteristics of electrode microstructures are favorable for higher efficiency.
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Category

Academic article

Language

English

Author(s)

  • Eric Langner
  • Artem Semenov
  • Ahmed Makradi
  • Sylvain Gouttebroze
  • Salim Belouettar
  • Thomas Wallmersperger

Affiliation

  • SINTEF Industry / Metal Production and Processing
  • Luxembourg Institute of Science and Technology
  • Dresden University of Technology

Year

2024

Published in

Proceedings in Applied Mathematics and Mechanics : PAMM

Volume

24

Issue

4

View this publication at Norwegian Research Information Repository