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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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In situ hybrid Nafion/SiO2-P2O5 proton conductors for high-temperature and low-humidity proton exchange membrane fuel cells

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Title
In situ hybrid Nafion/SiO2-P2O5 proton conductors for high-temperature and low-humidity proton exchange membrane fuel cells
Author
So, Soon YongKim, Sung ChulLee, Sang-Young
Keywords
High temperature; In situ hybrid membranes; Low humidity; Nafion; PEMFC; SiO2-P2O5; Tetraethoxysilane; Trimethylphosphate
Issue Date
201009
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MEMBRANE SCIENCE, v.360, no.1-2, pp.210 - 216
Abstract
A proton-conducting membrane demonstrating excellent proton conductivity at high-temperature/low-humidity conditions as well as at fully hydrated states is an urgent demand for proton exchange membrane fuel cells (PEMFC). In this study, in a bid to achieve this goal, we develop a new hybrid membrane, which is based on incorporating SiO2-P2O5 glass electrolytes into hydrophilic channels of Nafion115 by in situ sol-gel synthesis of tetraethoxysilane (TEOS) and trimethylphosphate (TMP). The effect of SiO2-P2O5 content on the morphology, state of water, and water uptake of the hybrid membranes is quantitatively identified. Not only the well-connected/enlarged hydrophilic channels but also the increase in the number of free/bound water molecules is observed in the hybrid membranes. These interesting features are expected to enable the hybrid membranes to present the higher proton conductivity than the pristine Nafion115, which becomes more noticeable at high-temperature/low-humidity conditions.
URI
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DOI
http://dx.doi.org/10.1016/j.memsci.2010.05.008
ISSN
0376-7388
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