Electrochemical impedance spectroscopy for investigation of different losses in 4-cells short stack with integrated humidi er and water separator
Publish place: Iranian Journal of Hydrogen & Fuel، Vol: 3، Issue: 2
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJHFC-3-2_004
تاریخ نمایه سازی: 21 فروردین 1397
Abstract:
Electrochemical impedance spectroscopy (EIS) is a suitable and powerful diagnostic testing method for fuel cells (FCs) since it is non-destructive and provides useful information about FC performance and its components. In this study, a 500W cascade type 4 cells stack with integrated humidi er, water separator and internal manifolds was designed, fabricated and tested for the rst time. The diagnostic test was conducted by EIS. The effects of dead end and open end modes of the stack impedance spectra are studied. The results suggested that ohmic resistance of the single cell decreased as the current density increased due to the greater effect of hydration of membrane. The results of the electrochemical impedance revealed that the gas operating mode had signi cant impact on electrochemical impedance of the stack. When the stack was tested on dead end mode, the charge transfer resistance of the stack decreased dramatically and its in uence on mass transfer resistances was negligible.
Keywords:
PEM Fuel Cell (PEMFC) , Cascade type stack , Electrochemical Impedance Spectroscopy , (EIS) , Dead-end Operation
Authors
E Alizadeh
Fuel Cell Technology Research Laboratory, Malek Ashtar University of Technology, Fridonkenar, Islamic Republic of Iran
M Khorshidian
Fuel Cell Technology Research Laboratory, Malek Ashtar University of Technology, Fridonkenar, Islamic Republic of Iran
S.M Rahgoshay
Fuel Cell Technology Research Laboratory, Malek Ashtar University of Technology, Fridonkenar, Islamic Republic of Iran
S.H.M Saadat
Fuel Cell Technology Research Laboratory, Malek Ashtar University of Technology, Fridonkenar, Islamic Republic of Iran