Translational and reorientational dynamics of ionic liquid-based fluorine-free lithium-ion battery electrolytes
2022 (Engelska)Ingår i: Journal of Molecular Liquids, ISSN 0167-7322, E-ISSN 1873-3166, Vol. 345, artikel-id 117001Artikel i tidskrift (Refereegranskat) 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.
Ort, förlag, år, upplaga, sidor
Elsevier, 2022. Vol. 345, artikel-id 117001
Nyckelord [en]
Diffusion, Ionic liquid electrolytes, Lithium salt doping effect, Reorientational dynamics
Nationell ämneskategori
Fysikalisk kemi Materialkemi
Forskningsämne
Gränsytors kemi
Identifikatorer
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
Forskningsfinansiär
Kempestiftelserna, SMK-1838Vetenskapsrådet, 2018-04133
Anmärkning
Validerad;2022;Nivå 2;2022-03-04 (hanlid);
Funder: Kazan Federal University (0671-2020-0051)
2021-07-262021-07-262022-03-17Bibliografiskt granskad