KAUST Grant NumberKUS-C1-018-02
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AbstractWe investigate physical and electrochemical properties of a family of organic-inorganic hybrid electrolytes based on the ionic liquid 1-methyl-3-propylimidazolium bis(trifluoromethanesulfone) imide covalently tethered to silica nanoparticles (SiO 2-IL-TFSI). The ionic conductivity exhibits a pronounced maximum versus LiTFSI composition, and in mixtures containing 13.4 wt% LiTFSI, the room-temperature ionic conductivity is enhanced by over 3 orders of magnitude relative to either of the mixture components, without compromising lithium transference number. The SiO 2-IL-TFSI/LiTFSI hybrid electrolytes are thermally stable up to 400°C and exhibit tunable mechanical properties and attractive (4.25V) electrochemical stability in the presence of metallic lithium. We explain these observations in terms of ionic coupling between counterion species in the mobile and immobile (particle-tethered) phases of the electrolytes. © 2012 The Royal Society of Chemistry.
CitationLu Y, Moganty SS, Schaefer JL, Archer LA (2012) Ionic liquid-nanoparticle hybrid electrolytes. J Mater Chem 22: 4066. Available: http://dx.doi.org/10.1039/c2jm15345a.
SponsorsThis publication was based on work supported in part by Award No. KUS-C1-018-02, made by King Abdullah University of Science and Technology (KAUST) and by the National Science Foundation, Award No. DMR-1006323. Facilities available through the Cornell Center for Materials Research (CCMR), National Science Foundation Award No. DMR-1120296, were also used for this study.
PublisherRoyal Society of Chemistry (RSC)
JournalJournal of Materials Chemistry