Enhancement of polymer electrolyte membrane fuel cell performance by boiling a membrane electrode assembly in sulfuric acid solution

Title
Enhancement of polymer electrolyte membrane fuel cell performance by boiling a membrane electrode assembly in sulfuric acid solution
Authors
조용훈김진호유성종전태열안민제정남기조윤환임주완이중기성영은
Keywords
PEMFC; MEA; Catalyst-coated membrane; Pretreatment; Polymer electrolyte membrane fuel cell; Sulfuric acid solution
Issue Date
2010-09
Publisher
Journal of power sources
Citation
VOL 195, NO 18, 5952-5956
Abstract
A catalyst-coated membrane (CCM) as used in the membrane electrode assembly (MEA) of a polymer electrolyte membrane fuel cell is treated by dilute sulfuric acid solution (0.5M) at boiling temperature for 1 h. This treatment improves the single-cell performance of the CCM without further addition of Pt catalyst. The changed microstructure and electrochemical properties of the catalyst layer are investigated by field emission scanning electron microscopy with energy dispersive X-ray, mercury intrusion porosimetry, waterdrop contact angle measurement, Fourier transform-infrared spectrometry in attenuated total reflection mode, electrochemical impedance spectroscopy, and cyclic voltammetry. The results indicate that this pretreatment enhances MEA performance by changing the microstructure of the catalyst layer and thus changing the degree of hydration, and by modifying the Pt surface, thus enhancing the oxygen reduction reaction.
URI
http://pubs.kist.re.kr/handle/201004/37670
ISSN
0378-7753
Appears in Collections:
KIST Publication > Article
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