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dc.contributor.author Sahu, Akhila Kumar -
dc.contributor.author Ketpang, Kriangsak -
dc.contributor.author Shanmugam, Sangaraju -
dc.contributor.author Kwon, Osung -
dc.contributor.author Lee, Sangcheol -
dc.contributor.author Kim, Hasuck -
dc.date.available 2017-07-05T08:36:15Z -
dc.date.created 2017-04-10 -
dc.date.issued 2016-07-28 -
dc.identifier.issn 1932-7447 -
dc.identifier.uri http://hdl.handle.net/20.500.11750/2232 -
dc.description.abstract Sulfonic acid-functionalized graphene (S-graphene) is employed as a promising inorganic filler as well as a solid acid proton conducting medium to realize a composite membrane with Nafion for polymer electrolyte fuel cell (PEFC) applications under reduced relative humidity (RH). The functionalization of graphene is performed by sulfonic acid-containing aryl radicals to increase the number of sulfonate groups per unit volume of a domain. A Nafion-S-graphene composite membrane is obtained by embedding S-graphene in Nafion, which provides high absorption of water and fast proton-transport across the electrolyte membrane under low RH values. The proton conductivity of the Nafion-S-graphene (1%) composite membrane at 20% RH is 17 mS cm-1, which is five times higher than that of a pristine recast Nafion membrane. PEFCs incorporating the Nafion-S-graphene composite membrane deliver a peak power density of 300 mW cm-2 at a load current density of 760 mA cm-2 while operating at optimum temperature of 70 °C under 20% RH and ambient pressure. By contrast, operating under identical conditions, a peak power density of 220 mW cm-2 is achieved with the pristine recast Nafion membrane. The Nafion-S-graphene composite membrane could be used to address many critical problems associated with commercial Nafion membranes in fuel cell applications. © 2016 American Chemical Society. -
dc.publisher American Chemical Society -
dc.title Sulfonated Graphene-Nafion Composite Membranes for Polymer Electrolyte Fuel Cells Operating under Reduced Relative Humidity -
dc.type Article -
dc.identifier.doi 10.1021/acs.jpcc.5b11674 -
dc.identifier.scopusid 2-s2.0-84979942213 -
dc.identifier.bibliographicCitation Journal of Physical Chemistry C, v.120, no.29, pp.15855 - 15866 -
dc.subject.keywordPlus Composite Membranes -
dc.subject.keywordPlus Electrolyte Membrane -
dc.subject.keywordPlus Electrolytes -
dc.subject.keywordPlus Filled Polymers -
dc.subject.keywordPlus Fuel Cell Application -
dc.subject.keywordPlus Fuel Cells -
dc.subject.keywordPlus Functionalization -
dc.subject.keywordPlus Graphene -
dc.subject.keywordPlus GRAPHITE NANOCOMPOSITES -
dc.subject.keywordPlus HIGH-TemPERATURE -
dc.subject.keywordPlus HYBRID MemBRANES -
dc.subject.keywordPlus Hydrogen -
dc.subject.keywordPlus Identical Conditions -
dc.subject.keywordPlus MemBRANES -
dc.subject.keywordPlus Nafion Composite Membranes -
dc.subject.keywordPlus OXIDE -
dc.subject.keywordPlus Peak Power Densities -
dc.subject.keywordPlus PERFORMANCE -
dc.subject.keywordPlus Polyelectrolytes -
dc.subject.keywordPlus Polymer Electrolyte Fuel Cell Applications -
dc.subject.keywordPlus Polymer Electrolyte Fuel Cells -
dc.subject.keywordPlus PROTON-EXCHANGE MemBRANES -
dc.subject.keywordPlus Proton Exchange Membrane Fuel Cells (PemFC) -
dc.subject.keywordPlus Solid Electrolytes -
dc.subject.keywordPlus Sulfonic ACID-Functionalized -
dc.subject.keywordPlus TRANSPORT -
dc.subject.keywordPlus Water Absorption -
dc.subject.keywordPlus Water Management -
dc.citation.endPage 15866 -
dc.citation.number 29 -
dc.citation.startPage 15855 -
dc.citation.title Journal of Physical Chemistry C -
dc.citation.volume 120 -

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