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Translational and reorientational dynamics of ionic liquid-based fluorine-free lithium-ion battery electrolytes
Institute of Physics, Kazan Federal University, 420008 Kazan, Russia.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering. Medical and Biological Physics, Kazan Medical University, 420012, Kazan, Russia.ORCID iD: 0000-0002-6810-1882
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-7940-7297
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-3652-7798
2022 (English)In: Journal of Molecular Liquids, ISSN 0167-7322, E-ISSN 1873-3166, Vol. 345, article id 117001Article in journal (Refereed) Published
Abstract [en]

The translational as well as reorientational mobilities of fluorine-free electrolytes prepared by mixing lithium furan-2-carboxylate Li(FuA) salt with tetra(n-butyl)phosphonium furan-2-carboxylate (P4444)(FuA) ionic liquid are thoroughly investigated. The diffusivity of ions and T1 relaxation of protons belonging to various chemical groups of (P4444)+ and (FuA) ions and the Li+ ion present in these electrolytes are measured as a function of lithium salt concentration and temperature. The temperature dependence of correlation time for reorientational mobility of various chemical groups of (P4444)+ and (FuA) ions and the Li+ ion are estimated and used in calculations temperature dependence of the corresponding reorientational rates. It is shown that an increase in the concentration of lithium salt leads to a decrease in both the diffusion coefficients and the reorientation rates for all the chemical groups in concerted way. Activation energy of the reorientational rates for different chemical groups of the organic ions and the Li+ are discussed in details.

Place, publisher, year, edition, pages
Elsevier, 2022. Vol. 345, article id 117001
Keywords [en]
Diffusion, Ionic liquid electrolytes, Lithium salt doping effect, Reorientational dynamics
National Category
Physical Chemistry Materials Chemistry
Research subject
Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-86448DOI: 10.1016/j.molliq.2021.117001ISI: 000754557900005Scopus ID: 2-s2.0-85111070226OAI: oai:DiVA.org:ltu-86448DiVA, id: diva2:1581764
Funder
The Kempe Foundations, SMK-1838Swedish Research Council, 2018-04133
Note

Validerad;2022;Nivå 2;2022-03-04 (hanlid);

Funder: Kazan Federal University (0671-2020-0051)

Available from: 2021-07-26 Created: 2021-07-26 Last updated: 2022-03-17Bibliographically approved

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Filippov, AndreiKhan, Inayat AliShah, Faiz Ullah

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