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Energies 2015, 8(12), 13953-13959; doi:10.3390/en81212406

A Simple Expression for the Tortuosity of Gas Transport Paths in Solid Oxide Fuel Cells’ Porous Electrodes

†,* ,
,
and
School of Energy and Power Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Masoud Rokni
Received: 28 October 2015 / Revised: 23 November 2015 / Accepted: 1 December 2015 / Published: 9 December 2015
(This article belongs to the Special Issue Solid Oxide Fuel Cells)
View Full-Text   |   Download PDF [1282 KB, uploaded 10 December 2015]   |  

Abstract

Based on the three-dimensional (3D) cube packing model, a simple expression for the tortuosity of gas transport paths in solid oxide fuel cells’ (SOFC) porous electrodes is developed. The proposed tortuosity expression reveals the dependence of the tortuosity on porosity, which is capable of providing results that are very consistent with the experimental data in the practical porosity range of SOFC. Furthermore, for the high porosity (>0.6), the proposed tortuosity expression is also accurate. This might be helpful for understanding the physical mechanism for the tortuosity of gas transport paths in electrodes and the optimization electrode microstructure for reducing the concentration polarization. View Full-Text
Keywords: solid oxide fuel cells (SOFC); tortuosity; diffusion coefficient; electrode; porous media solid oxide fuel cells (SOFC); tortuosity; diffusion coefficient; electrode; porous media
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kong, W.; Zhang, Q.; Xu, X.; Chen, D. A Simple Expression for the Tortuosity of Gas Transport Paths in Solid Oxide Fuel Cells’ Porous Electrodes. Energies 2015, 8, 13953-13959.

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