Measurement of relative permeability of fuel cell diffusion media

Gas diffusion layer (GDL) in PEM fuel cells plays a pivotal role in water management. Modeling of liquid water transport through the GDL relies on knowledge of relative permeability functions in the in-plane and through-plane directions. In the present work, air and water relative permeabilities are...

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Bibliographic Details
Published in:Journal of power sources 2010-06, Vol.195 (12), p.3830-3840
Main Authors: Hussaini, I.S., Wang, C.Y.
Format: Article
Language:English
Subjects:
Applied sciences
Diffusion media
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Experimental
Fuel cells
PEM fuel cell
Relative permeability
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Summary:Gas diffusion layer (GDL) in PEM fuel cells plays a pivotal role in water management. Modeling of liquid water transport through the GDL relies on knowledge of relative permeability functions in the in-plane and through-plane directions. In the present work, air and water relative permeabilities are experimentally determined as functions of saturation for typical GDL materials such as Toray-060, -090, -120 carbon paper and E-Tek carbon cloth materials in their plain, untreated forms. Saturation is measured using an ex situ gravimetric method. Absolute and relative permeability functions in the two directions of interest are presented and new correlations for in-plane relative permeability of water and air are established.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2009.12.105