Development of a Durable PEMFC Startup Process by Applying a Dummy Load: I. Electrochemical Study

Title
Development of a Durable PEMFC Startup Process by Applying a Dummy Load: I. Electrochemical Study
Authors
김재홍조은애장종현김형준임태훈오인환고재준오승찬
Keywords
PEMFC; Durability; Carbon corrosion
Issue Date
2009-06
Publisher
Journal of the Electrochemical Society
Citation
VOL 156, NO 8, B955-B961
Abstract
Various polymer electrolyte membrane fuel cell PEMFC startup procedures were tested to explore possible techniques for reducing performance decay and improving durability during repeated startup–shutdown cycles. The effects of applying a dummy load, which prevents cell reversal by consuming the air at the cathode, on the degradation of a membrane electrode assembly were investigated via single-cell experiments. Electrochemical techniques, including measurement of polarization curves, electrochemical impedance spectroscopy, cyclic voltammetry, and linear sweep voltammetry, were employed to investigate the degradation of the PEMFCs. The results showed that application of a dummy load during the startup procedure significantly reduced the performance decay, the decrease in the electrochemically active surface area, and the increase in charge-transfer resistance Rct , which resulted in a dramatic improvement in durability. Our results suggest that starting up PEMFCs while applying a dummy load is an effective method for mitigating performance degradation caused by cell reversal under a repetition of unprotected startup cycles.
URI
http://pubs.kist.re.kr/handle/201004/35459
ISSN
0013-4651
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE