Effect of heat treatment temperature on carbon corrosion in polymer electrolyte membrane fuel cells

Title
Effect of heat treatment temperature on carbon corrosion in polymer electrolyte membrane fuel cells
Authors
오형석고영진김한성
Keywords
Carbon nanofiber; Durability; Heat-treatment temperature; Carbon corrosion; Polymer electrolyte membrane fuel cell
Issue Date
2010-05
Publisher
Journal of power sources
Citation
VOL 195, NO 9-2627
Abstract
This study examines the effect of heat-treatment temperature on the electrochemical corrosion of carbon nanofibers (CNFs) in polymer electrolyte membrane (PEM) fuel cells. Corrosion is investigated by monitoring the generation of CO2 using an on-line mass spectrometer at a constant potential of 1.4V for 30 min. The experimental results show that the generation of CO2 decreases with increasing heat-treatment temperature, indicating that less electrochemical carbon corrosion occurs. In particular, when the heat-treatment temperature is 2400 degrees C, the change intensifies. X-ray photoelectron spectroscopic analysis shows that oxygen functional groups on the carbon surface decrease with increasing heat-treatment temperature. A reduction in oxygen functional groups increases the hydrophobic nature of the carbon surface, which is responsible for the increased corrosion resistance of CNFs.
URI
http://pubs.kist.re.kr/handle/201004/67202
ISSN
0378-7753
Appears in Collections:
KIST Publication > Article
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