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A composite electrolyte membrane containing high-content sulfonated carbon spheres for proton exchange membrane fuel cells

✍ Scribed by Younggeun choi; Youngkwon Kim; Kyung Yeon Kang; Jae Sung Lee

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
937 KB
Volume
49
Category
Article
ISSN
0008-6223

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✦ Synopsis

Sulfonated carbon spheres (SCS) were employed with perfluorinated ionomers as a binder to make proton-conducting electrolyte membranes for polymer electrolyte membrane fuel cells (PEMFC). Hot-pressing produced a symmetric, thin membrane with SCS particles concentrated in the center of the membrane. Relative to Nafion, the SCS materials showed higher density of sulfonic acid groups and increased water retention capacity of the membrane. This is the favorable condition for effective back diffusion of water from cathode preventing dehydration of membrane. As a result, the SCS membrane showed much better performance in single cell PEMFC operation than Nafion membrane. The membrane also showed much improved tolerance to chemical degradation by oxygen radical species.

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