Coupling RTD and EIS modelling to characterize operating non-uniformities on PEM cathodes - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Power Sources Année : 2008

Coupling RTD and EIS modelling to characterize operating non-uniformities on PEM cathodes

Résumé

Large PEM cells will be used in future proton exchange membrane fuel cell (PEMFC) power plants and appropriate tools are therefore be needed to study their behaviour. One approach to understanding single cell behaviour involves using mathematical models. The numerous techniques used in this work to describe PEM electrode behaviour require different scientific disciplines: chemical engineering and electrochemistry. This study proposes combining residence time distribution (RTD) and electrochemical impedance spectroscopy (EIS). The investigation focuses on cathodic DC and AC responses where over-voltage is critical. Results demonstrate that although gas distribution does not cause additional loops on impedance diagrams, it is strongly related to both the shape and amplitude of these diagrams. The simulations have drawn attention to operating conditions that can threaten the life of the PEM cell: under these setting points EIS method is not sufficient to detect this risk.

Domaines

Matériaux

Dates et versions

hal-00386277 , version 1 (20-05-2009)

Identifiants

Citer

Jonathan Deseure. Coupling RTD and EIS modelling to characterize operating non-uniformities on PEM cathodes. Journal of Power Sources, 2008, 178 (1), pp. 323-333. ⟨10.1016/j.jpowsour.2007.11.071⟩. ⟨hal-00386277⟩
41 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More