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Numerical Simulation of SOFC Performance Affected by Cathode Mesoscale-Structure Control

[+] Author Affiliations
Akio Konno, Hiroshi Iwai, Motohiro Saito, Hideo Yoshida

Kyoto University, Kyoto, Japan

Paper No. FuelCell2008-65246, pp. 387-394; 8 pages
doi:10.1115/FuelCell2008-65246
From:
  • ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology
  • Denver, Colorado, USA, June 16–18, 2008
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4318-1 | eISBN: 0-7918-3822-6
  • Copyright © 2008 by ASME

abstract

Increase of the current density is one of the most important topics in the development of solid oxide fuel cells. In this study we focus on the possibility of the current density enhancement by controlling the mesoscale structure of the electrodes. Modifications of the mesoscale structures increase the area of electrode-electrolyte interface and the volume of the electrode, reduce the electrolyte thickness, affect gas diffusion in the porous electrode and consequently influence the cell performance. To evaluate its effect on the cell performance, two-dimensional numerical simulation for SOFC with and without mesoscale grooves on the cathode-electrolyte interface is conducted to understand the effects of such cathode mesoscale structure on the cell performance. It is found that the electrochemical reaction in porous electrodes takes place in the region close to the electrode-electrolyte interface and the cell performance can be improved by applying cathode mesoscale structures.

Copyright © 2008 by ASME

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