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Received May 12, 2009
Accepted June 23, 2009
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Physical degradation of MEA in PEM fuel cell by on/off operation under nitrogen atmosphere
1Department of Chemical and Biomolecular Engineering, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea 2The Specialized Graduate School of Hydrogen & Fuel Cell, Yonsei University, 134 Shinchon-dong, Seodaemun-gu, Seoul 120-749, Korea
Korean Journal of Chemical Engineering, January 2010, 27(1), 104-109(6), 10.1007/s11814-009-0312-6
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Abstract
The durability of PEMFCs is one of the most important issues for application in automotive vehicles with a repeated start-up and shut-down system. The understanding of degradation phenomena such as causes, mechanisms and influence of working condition is essential to improving the performance and lifetime of PEMFC. We conducted on/off cyclic operation in a single cell configuration with ultra purity nitrogen gas to investigate the physical degradation_x000D_
of membrane electrode assembly (MEA). After on/off cycle operation for 100,000 cycles under different humid condition, the characteristics of the MEAs were examined by in situ and ex situ analyses techniques. The physical degradation of MEA by on/off cycling led to a change in the membrane-electrode interfacial structure, which is mainly attributed to the loss of cell performance.
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