An analytical solution for transport of oxygen in cathode gas diffusion layer of PEMFC
Resource
Journal of Power Sources 160 (1): 50-56
Journal
Journal of Power Sources
Journal Volume
160
Journal Issue
1
Pages
50-56
Date Issued
2006
Date
2006
Author(s)
Abstract
A two-dimensional theoretical model is developed in this study to simulate the transport phenomena of oxygen in cathode gas diffusion layer (GDL) of proton exchange membrane fuel cell (PEMFC). An analytical solution is then obtained accordingly to characterize the effects of GDL on cell performance. It is found that the concentration flux of oxygen across the GDL is primarily dominated by the thickness and porosity of GDL. For a thicker GDL, the diffusion resistance increases and thus lowers the cell performance especially under high current density condition. On the other hand, an increase of porosity will enhance the transport of oxygen and result in significant improvement of cell performance. The influences of system parameters including the temperature, channel height, inlet velocity, and inlet pressure on the diffusion of oxygen in GDL are also examined systematically. Results provide insights into the characteristics of oxygen diffusion in GDL and benefit the optimal design of PEMFC. © 2006 Elsevier B.V. All rights reserved.
Subjects
Analytical solution; Cathode gas diffusion layer; Proton exchange membrane fuel cell
SDGs
Other Subjects
Cathodes; Computer simulation; Diffusers (fluid); Gas fuels; Oxygen; Porosity; Protons; Transport properties; Analytical solution; Cathode gas diffusion layers; Diffusion resistance; Proton exchange membrane fuel cell (PEMFC); Fuel cells
Type
journal article
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