You are here: Home :: Area NEM :: Chemistry :: Physical chemistry

S. Kjelstrup, P: Pugazhendi, D. Bedeaux

Impedance of the Hydrogen Polymer Fuel Cell Electrode. Theory and Experiments

We derive the impedance for the hydrogen electrode in the polymer membrane fuel cell from irreversible thermodynamics. The results predict a surface contribution to the cell impedance that can give two semi-circles in the Nyquist diagram. The equivalent circuit of the impedance is shown. The high-frequency contribution is connected to the oscillation of dipoles consisting of free charges in the surface, while the low-frequency contribution is connected to the electrochemical reaction. This can be explained by a slowly relaxing proton conducting polymer network at the reaction site.

Zeitschrift für Physikalische Chemie, Oldenbourg Wissenschaftsverlag

Print ISSN: 0942-9352
Volume: 214, 07/2000
Pages: 895

Journal homepage (external site)

Show all available items of this journal

 

Area NEM