Composite polymer electrolyte containing ionic liquid and functionalized polyhedral oligomeric silsesquioxanes for anhydrous PEM applications

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dc.contributor.authorSubianto, Sen_AU
dc.contributor.authorMistry, MKen_AU
dc.contributor.authorChoudhury, NRen_AU
dc.contributor.authorDutta, NKen_AU
dc.contributor.authorKnott, RBen_AU
dc.date.accessioned2011-04-04T23:14:47Zen_AU
dc.date.available2011-04-04T23:14:47Zen_AU
dc.date.issued2009-06-24en_AU
dc.date.statistics2009-06-24en_AU
dc.description.abstractA new type of supported liquid membrane was made by combining an ionic liquid (IL) with a Nafion membrane reinforced with multifunctional polyhedral oligomeric silsesquioxanes (POSSs) using a layer-by-layer strategy for anhydrous proton-exchange membrane (PEM) application. The POSS was functionalized by direct sulfonation, and the sulfonated POSS (S-POSS) was incorporated into Nafion 117 membranes by the infiltration method. The resultant hybrid membrane shows strong ionic interaction between the Nafion matrix and the multifunctional POSS, resulting in increased glass transition temperature and thermal stability at very low loadings of S-POSS (1%). The presence of S-POSS has also improved the proton conductivity especially at low humidities, where it shows a marked increase due to its confinement in the ionic domains and promotes water uptake by capillary condensation. In order to achieve anhydrous conductivity, the IL 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMI-BTSI) was incorporated into these membranes to provide proton conduction in the absence of water. Although the incorporation of an IL shows a plasticizing effect on the Nafion membrane, the S-POSS composite membrane with an IL shows a higher modulus at high temperatures compared to Nafion 117 and a Nafion−IL membrane, with significantly higher proton conductivity (5 mS/cm at 150°C with 20% IL). This shows the ability of the multifunctional POSS and IL to work symbiotically to achieve the desirable proton conductivity and mechanical properties of such membranes by enhancing the ionic interaction within the material. © 2009, American Chemical Societyen_AU
dc.identifier.citationSubianto, S., Mistry, M. K., Choudhury, N. R., Dutta, N. K., & Knott, R. (2009). Composite polymer electrolyte containing ionic liquid and functionalized polyhedral oligomeric silsesquioxanes for anhydrous PEM applications. ACS Applied Materials & Interfaces, 1(6), 1173-1182. doi:10.1021/am900020wen_AU
dc.identifier.govdoc3344en_AU
dc.identifier.issn1944-8244en_AU
dc.identifier.issue6en_AU
dc.identifier.journaltitleACS Applied Materials & Interfacesen_AU
dc.identifier.pagination1173-1182en_AU
dc.identifier.urihttp://dx.doi.org/10.1021/am900020wen_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3557en_AU
dc.identifier.volume1en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectFuel cellsen_AU
dc.subjectIonic compositionen_AU
dc.subjectLiquidsen_AU
dc.subjectProton conductivityen_AU
dc.subjectMechanical propertiesen_AU
dc.subjectMembranesen_AU
dc.titleComposite polymer electrolyte containing ionic liquid and functionalized polyhedral oligomeric silsesquioxanes for anhydrous PEM applicationsen_AU
dc.typeJournal Articleen_AU
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