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Issue
Korean Journal of Chemical Engineering,
Vol.37, No.4, 577-582, 2020
Experimental investigation of charge transfer coefficient and exchange current density in standard fuel cell model for polymer electrolyte membrane fuel cells
Lee HW, Han CH, Park TH
Two representative parameters, exchange current density (j0) and charge transfer coefficient (α), in a standard fuel cell model of polymer electrolyte membrane fuel cells (PEMFCs) were experimentally investigated. The polarization characteristics and the corresponding electrochemical impedance spectra of the normal PEMFCs were measured and Tafel curves were calculated from them, where j0 and α were finally calculated. As a result, the calculated j0 was 0.11- 0.70 A/cm2, while the α was 0.056-0.023, depending on the operating temperature. Here, the j0 is extremely overestimated while α is underestimated as compared with those in literature. Although the reason for such difference is not clear, it is expected that it could affect the predicted performance by the model significantly if the fuel cell performance is improved highly in the future so the activation overvoltage corresponding to identical current is lowered.
Keywords: Polymer Electrolyte Membrane Fuel Cell; Charge Transfer Coefficient; Exchange Current Density; Fuel Cell Model; Electrochemical Impedance Spectroscopy
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[Cited By]
  1. Yang SW, Chung YJ, Lee KS, Kwon YC, Journal of Industrial and Engineering Chemistry, 90, 351, 2020
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