Improved experimental method for measuring gas diffusivity through thin porous media

Gas diffusion through porous media is critical for the high current density operation of a polymer electrolyte membrane fuel cell, where the electrochemical reaction becomes rate limited by the diffusive flux of reactants. Precise knowledge of the diffusivity through various components in a fuel cel...

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Veröffentlicht in:	AIChE journal 2013-04, Vol.59 (4), p.1409-1419
Hauptverfasser:	Unsworth, Grant, Dong, Lu, Li, Xianguo
Format:	Artikel
Sprache:	eng
Schlagworte:	closed-tube method Density Diffusion Diffusion rate Diffusivity effective diffusion coefficient Electrolytes Electrolytic cells experimental measurement Fuel cells Gas diffusion gas diffusion layer Indexing in process Loschmidt cell Membranes polymer electrolyte membrane fuel cell Polymers Porosity Porous media Scanning electron microscopy
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