Characterization of the Degradation in Membrane Electrode Assemblies Through Passive Electrical Measurements.
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| Title: | Characterization of the Degradation in Membrane Electrode Assemblies Through Passive Electrical Measurements. |
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| Authors: | Flandin, L.1 lionel.flandin@univ-savoje.fr, Danérol, A. S.1, Bas, C.1, Claude, E.2, De-Moor, G.1, Albérola, N.1 |
| Source: | Journal of The Electrochemical Society. 2009, Vol. 156 Issue 10, pB1117-B1123. 7p. |
| Subjects: | Monte Carlo method, Numerical analysis, Impedance spectroscopy, Electrochemical analysis, Electrodes |
| Abstract: | A passive technique to characterize the degradation of membrane electrode assemblies is presented; it is based on simple measurement of electrical characteristics as a function of time. This method relies on the experimental.evidence that the assembly behaves like a supercapacitor with a tremendous capacity in series with a small resistance. In a first approximation, a resistorcapacitor (RC) circuit can thus be utilized to model the charging and discharging behavior. The experimental data demonstrated that a more sophisticated equivalent circuit was necessary to understand the experimental results. The most favorable set of parameters was determined, thanks to a Monte Carlo type numerical analysis. Overall, a larger sensitivity to damage detection than the well-accepted electrochemical impedance spectroscopy is demonstrated that suggests a promising future to in Situ detection of failure and understanding of degradation mechanisms. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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