Direct synthesis of sulfonated mesoporous silica as inorganic fillers of proton-conducting organic-inorganic composite membranes

Title
Direct synthesis of sulfonated mesoporous silica as inorganic fillers of proton-conducting organic-inorganic composite membranes
Author(s)
김혜경이재성[이재성]최영근[최영근]김영권[김영권]
Keywords
METHANOL FUEL-CELLS; SOL-GEL REACTIONS; ELECTROLYTE MEMBRANE; HYBRID; ACID; OPERATION; PERFORMANCE; NAFION(R); ORMOSIL
Issue Date
201007
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MEMBRANE SCIENCE, v.357, no.1-2, pp.199 - 205
Abstract
The mesoporous silica sphere grafted with organic sulfonic acid has been synthesized by a condensation reaction of 1,3-propane sultone and 3-mercaptopropyltrimethoxy silane, followed by hydrothermal reaction with tetramethoxysilane. Proton-conducting organic-inorganic composite membranes were cast together with Nafion (R) using these functionalized mesoporous silicas as inorganic fillers. The composite membrane showed increased water uptake and higher ionic conductivity relative to recast Nafion membrane under low relative humidity condition. This led to enhanced performance of proton exchange membrane fuel cell employing the composite membrane containing the sulfonated mesoporous silica under the low humidity condition without external humidification of reactant gas. The current density at 0.5 V of the membrane-electrode assembly (MEA) fabricated with composite membrane containing the sulfonated mesoporous silica was ca. 3.3 times higher than that of the MEA fabricated with recast Nafion membrane. (C) 2010 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/23919http://dx.doi.org/10.1016/j.memsci.2010.04.024
ISSN
0376-7388
Appears in Collections:
공과대학 > 신소재공학부 > Articles
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