Dielectric study on mixtures of ionic liquids

Abstract Ionic liquids are promising candidates for electrolytes in energy-storage systems. We demonstrate that mixing two ionic liquids allows to precisely tune their physical properties, like the dc conductivity. Moreover, these mixtures enable the gradual modification of the fragility parameter,...

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Autores principales:	E. Thoms, P. Sippel, D. Reuter, M. Weiß, A. Loidl, S. Krohns
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2444c64635b14628b31d2dade291be05
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spelling	oai:doaj.org-article:2444c64635b14628b31d2dade291be052021-12-02T12:32:32ZDielectric study on mixtures of ionic liquids10.1038/s41598-017-07982-32045-2322https://doaj.org/article/2444c64635b14628b31d2dade291be052017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07982-3https://doaj.org/toc/2045-2322Abstract Ionic liquids are promising candidates for electrolytes in energy-storage systems. We demonstrate that mixing two ionic liquids allows to precisely tune their physical properties, like the dc conductivity. Moreover, these mixtures enable the gradual modification of the fragility parameter, which is believed to be a measure of the complexity of the energy landscape in supercooled liquids. The physical origin of this index is still under debate; therefore, mixing ionic liquids can provide further insights. From the chemical point of view, tuning ionic liquids via mixing is an easy and thus an economic way. For this study, we performed detailed investigations by broadband dielectric spectroscopy and differential scanning calorimetry on two mixing series of ionic liquids. One series combines an imidazole based with a pyridine based ionic liquid and the other two different anions in an imidazole based ionic liquid. The analysis of the glass-transition temperatures and the thorough evaluations of the measured dielectric permittivity and conductivity spectra reveal that the dynamics in mixtures of ionic liquids are well defined by the fractions of their parent compounds.E. ThomsP. SippelD. ReuterM. WeißA. LoidlS. KrohnsNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q E. Thoms P. Sippel D. Reuter M. Weiß A. Loidl S. Krohns Dielectric study on mixtures of ionic liquids
description	Abstract Ionic liquids are promising candidates for electrolytes in energy-storage systems. We demonstrate that mixing two ionic liquids allows to precisely tune their physical properties, like the dc conductivity. Moreover, these mixtures enable the gradual modification of the fragility parameter, which is believed to be a measure of the complexity of the energy landscape in supercooled liquids. The physical origin of this index is still under debate; therefore, mixing ionic liquids can provide further insights. From the chemical point of view, tuning ionic liquids via mixing is an easy and thus an economic way. For this study, we performed detailed investigations by broadband dielectric spectroscopy and differential scanning calorimetry on two mixing series of ionic liquids. One series combines an imidazole based with a pyridine based ionic liquid and the other two different anions in an imidazole based ionic liquid. The analysis of the glass-transition temperatures and the thorough evaluations of the measured dielectric permittivity and conductivity spectra reveal that the dynamics in mixtures of ionic liquids are well defined by the fractions of their parent compounds.
format	article
author	E. Thoms P. Sippel D. Reuter M. Weiß A. Loidl S. Krohns
author_facet	E. Thoms P. Sippel D. Reuter M. Weiß A. Loidl S. Krohns
author_sort	E. Thoms
title	Dielectric study on mixtures of ionic liquids
title_short	Dielectric study on mixtures of ionic liquids
title_full	Dielectric study on mixtures of ionic liquids
title_fullStr	Dielectric study on mixtures of ionic liquids
title_full_unstemmed	Dielectric study on mixtures of ionic liquids
title_sort	dielectric study on mixtures of ionic liquids
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/2444c64635b14628b31d2dade291be05
work_keys_str_mv	AT ethoms dielectricstudyonmixturesofionicliquids AT psippel dielectricstudyonmixturesofionicliquids AT dreuter dielectricstudyonmixturesofionicliquids AT mweiß dielectricstudyonmixturesofionicliquids AT aloidl dielectricstudyonmixturesofionicliquids AT skrohns dielectricstudyonmixturesofionicliquids
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Dielectric study on mixtures of ionic liquids

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