Characteristics of Performance Degradation Caused by Repeated Cold Start below Freezing Point in a Polymer Electrolyte Fuel Cell(Thermal Engineering)
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Open Access
- 1 January 2010
- journal article
- Published by Japan Society of Mechanical Engineers in TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
- Vol. 76 (771) , 1950-1955
Abstract
This study investigates the characteristics of performance degradation caused by repeated cold starts of an MEA below freezing point in PEFC ． It was mude clear by this study that significant decay of performance was caused by repeated sequence of 50 cycies of freeze ， cold start ， operation and thaw under constant environmental temperature of-30 deg， C ． By applying Tafel analysis ， it was made clear that performance degradation is expressed mainly by the increase in activation overpotential and concentration overpotential and the increases are in proportion te repeated cycle number ． It was also found that performance decay appeared mainly in the cathode as measured by cyclic voltammetery (CV) and AC impeClance spectroscopyKeywords
This publication has 2 references indexed in Scilit:
- Decay of Electrode Performance and Changes in Material Properties of Degraded MEA Caused by Repeated Cold Starts of a Frozen Cell in a Polymer Electrolyte Fuel CellECS Meeting Abstracts, 2008
- Nanostructure of Clusters in Nafion Studied by DSCInternational Journal of Thermophysics, 2006