Ionic liquid based lithium battery electrolytes: fundamental benefits of utilising both TFSI and FSI anions?

Kerner, Manfred, 1984 (author): Chalmers tekniska högskola,Chalmers University of Technology

Plylahan, Nareerat, 1984 (author): Chalmers tekniska högskola,Chalmers University of Technology

Scheers, Johan, 1979 (author): Chalmers tekniska högskola,Chalmers University of Technology

Johansson, Patrik, 1969 (author): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

2015
2015
English.
In: Physical Chemistry Chemical Physics. - : Royal Society of Chemistry (RSC). - 1463-9084 .- 1463-9076. ; 17:29, s. 19569-19581

Related links:: http://dx.doi.org/10...; show more...; https://doi.org/10.1...; https://research.cha...; show less...

Abstract Subject headings

Several IL based electrolytes with an imidazolium cation (EMI) have been investigated trying to elucidate a possible beneficial effect of mixing FSI and TFSI anions in terms of physico-chemical properties and especially Li+ solvation. All electrolytes were evaluated in terms of phase transitions, densities and viscosities, thermal stabilities, ionic conductivities and local structure, i.e. charge carriers. The electrolytes with up to 20% of Li-salts showed to be promising for high temperature lithium ion battery application (ca. 100°C) and a synergetic effect of having mixed anions is discernible with the LiTFSI0.2EMIFSI0.8 electrolyte giving the best overall performance. The determination of the charge carriers revealed the SN to be ca. 2 for all analysed electrolytes, and proved the analysis of the mixed anion electrolytes to be challenging and inherently leads to an ambiguous picture of the Li+ solvation.

By the author/editor: Kerner, Manfred, ...; Plylahan, Nareer ...; Scheers, Johan, ...; Johansson, Patri ...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Condensed Matter ...

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