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Sökning: WFRF:(Croce F.) > (2010-2014) > Phase behaviour, tr...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003887naa a2200469 4500
001oai:research.chalmers.se:53e6d1bd-3da2-496d-84fd-9df27e2b0c3a
003SwePub
008171007s2012 | |||||||||||000 ||eng|
024a https://research.chalmers.se/publication/1517712 URI
024a https://doi.org/10.1039/c1fd00056j2 DOI
040 a (SwePub)cth
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
100a Pitawala, Jagath,d 1976u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)jagath
2451 0a Phase behaviour, transport properties, and interactions in Li-salt doped ionic liquids
264 c 2012
264 1b Royal Society of Chemistry (RSC),c 2012
520 a We report on the influence of lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) doping on the glass transition temperature (T(g)), the ionic conductivity, and Li-ion coordination of two dicationic ionic liquids (DILs) based on the TFSI anion. The results are compared to the behaviour of traditional mono-cationic ionic liquids. The cations of the DILs contain two imidazolium rings, connected by a decane hydrocarbon chain. Homogeneous mixtures of these ILs and LiTFSI can be obtained in a large concentration range. With increasing Li-salt concentration the ionic conductivity decreases whereas the glass transition temperature increases in both systems. However, the influence of the salt doping on the ionic conductivity and the glass transition temperature is low compared to typical mono-cationic ionic liquids, based on for example the pyrrolidinium cation and the TFSI anion. This behaviour is mirrored in the average coordination number of TFSI anions around Li-ions, determined by Raman spectroscopy. The coordination number is systematically lower in the DILs, suggesting a connection between the difference in the Li-ion environment and the behaviour of the glass transition and the ionic conductivity. A T(g)-scaled Arrhenius plot of the ionic conductivity shows that the ionic conductivity for all LiTFSI concentrations has the same temperature dependence, i.e. the fragility of the liquid is the same. This implies that the conduction process is dominated by the viscous properties of the liquids over the entire concentration range. This provides further support for linking the local environment of the Li-ions to the glass transition and conduction process in the ionic liquid/salt mixtures.
650 7a TEKNIK OCH TEKNOLOGIERx Materialteknik0 (SwePub)2052 hsv//swe
650 7a ENGINEERING AND TECHNOLOGYx Materials Engineering0 (SwePub)2052 hsv//eng
653 a raman-spectroscopy
653 a anion
653 a electrolytes
653 a cation
653 a solvation
653 a tfsi
653 a conduction
653 a physicochemical properties
653 a lithium
653 a batteries
700a Kim, Jae-Kwang,d 1978u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)jaekwang
700a Jacobsson, Per,d 1958u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)pjacob
700a Koch, V.u Covalent Associates, Inc.4 aut
700a Croce, F.u Universita degli Studi Gabriele d'annunzio di Chieti-Pescara,G. d'Annunzio University of Chieti-Pescara4 aut
700a Matic, Aleksandar,d 1968u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)matic
710a Chalmers tekniska högskolab Covalent Associates, Inc.4 org
773t Faraday Discussionsd : Royal Society of Chemistry (RSC)g 154, s. 71-80q 154<71-80x 1359-6640x 1364-5498
856u http://dx.doi.org/10.1039/c1fd00056jy FULLTEXT
8564 8u https://research.chalmers.se/publication/151771
8564 8u https://doi.org/10.1039/c1fd00056j

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