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Author

Lee, Sang-Young
Energy Soft-Materials Lab (ESML)
Research Interests
  • Soft Materials for Energy Storage/ Conversion Systems

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Multilayer-structured, SiO2/sulfonated poly(phenylsulfone) composite membranes for proton exchange membrane fuel cells

Cited 6 times inthomson ciCited 3 times inthomson ci
Title
Multilayer-structured, SiO2/sulfonated poly(phenylsulfone) composite membranes for proton exchange membrane fuel cells
Author
Lee, Jung-RanWon, Ji-HyeYoon, Kyung-SukHong, Young TaikLee, Sang-Young
Keywords
Dimensional change; Multilayer-structured composite membranes; Proton conductivity; Proton exchange membrane fuel cells; Silica; Sulfonated poly(phenylsulfone)
Issue Date
201204
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.37, no.7, pp.6182 - 6188
Abstract
In an effort to improve the dimensional change and proton conductivity of sulfonated poly(phenylsulfone) (SPPSU) membranes and facilitate their application to proton exchange membrane fuel cells (PEMFC), we develop a new composite membrane featured with a multilayer structure. The multilayer structure consists of a SPPSU-impregnated SiO 2 ceramic layer and a SPPSU layer. In contrast to a bulk composite membrane containing randomly dispersed SiO 2 nanoparticles, this unusual multilayer-structured composite membrane has an independent ceramic layer comprising close-packed SiO 2 nanoparticles and polyetherimide (PEI) binders. On the basis of structural characterization of the composite membranes, the effects of the multilayer structure on the membrane properties are investigated. The introduction of the SiO 2 ceramic layer is found to be effective in not only suppressing dimensional change but also enhancing proton conductivity of the multilayered composite membrane. Another intriguing finding is that the decrease of proton conductivity at a low humidity condition encountered in conventional water-swollen membranes is retarded in the multilayered composite membrane. These improvements in the proton conductivity of the multilayered composite membrane are discussed by considering the morphological uniqueness and the water retention capability of hygroscopic SiO 2 nanoparticles.
URI
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DOI
http://dx.doi.org/10.1016/j.ijhydene.2011.07.085
ISSN
0360-3199
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