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Transport and Association of Ions in Lithium Battery Electrolytes Based on Glycol Ether Mixed with Halogen-Free Orthoborate Ionic Liquid
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0003-3652-7798
Institute of Physics, Kazan Federal University, 420008, Kazan, Russia.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering.ORCID iD: 0000-0002-7340-7237
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Chemical Engineering. Institute of Physics, Kazan Federal University, Russia.ORCID iD: 0000-0002-6810-1882
2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, article id 16340Article in journal (Refereed) Published
Abstract [en]

Ion transport behaviour of halogen-free hybrid electrolytes for lithium-ion batteries based on phosphonium bis(salicylato)borate [P4,4,4,8][BScB] ionic liquid mixed with diethylene glycol dibutyl ether (DEGDBE) is investigated. The Li[BScB] salt is dissolved at different concentrations in the range from 0.15 mol kg−1 to 1.0 mol kg−1 in a mixture of [P4,4,4,8][BScB] and DEGDBE in 1:5 molar ratio. The ion transport properties of the resulting electrolytes are investigated using viscosity, electrical impedance spectroscopy and pulsed-Field Gradient (PFG) NMR. The apparent transfer numbers of ions are calculated from the diffusion coefficients measured by using PFG NMR. PFG NMR data suggested ion association upon addition of Li salt to the [P4,4,4,8][BScB] in DEGDBE solution. This is further confirmed by liquid state 7Li and 11B NMR, and FTIR spectroscopic techniques, which suggest strong interactions between the lithium cation and oxygen atoms of the [BScB]− anion in the hybrid electrolytes.

Place, publisher, year, edition, pages
Nature Publishing Group, 2017. Vol. 7, article id 16340
National Category
Chemical Sciences
Research subject
Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-66772DOI: 10.1038/s41598-017-16597-7PubMedID: 29180739OAI: oai:DiVA.org:ltu-66772DiVA, id: diva2:1160666
Note

Validerad;2017;Nivå 2;2017-11-29 (svasva)

Available from: 2017-11-27 Created: 2017-11-27 Last updated: 2018-06-08Bibliographically approved

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