Hofmann, Andreas;
Rauber, Daniel;
Wang, Tzu-Ming;
Hempelmann, Rolf;
Kay, Christopher WM;
Hanemann, Thomas;
(2022)
Novel Phosphonium-Based Ionic Liquid Electrolytes for Battery Applications.
Molecules
, 27
(15)
, Article 4729. 10.3390/molecules27154729.
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Abstract
In this study, we address the fundamental question of the physicochemical and electrochemical properties of phosphonium-based ionic liquids containing the counter-ions bis(trifluoromethanesulfonyl)imide ([TFSI]-) and bis(fluorosulfonyl)imide ([FSI]-). To clarify these structure-property as well as structure-activity relationships, trimethyl-based alkyl- and ether-containing phosphonium ILs were systematically synthesized, and their properties, namely density, flow characteristics, alkali metal compatibility, oxidative stability, aluminum corrosivity as well as their use in Li-ion cells were examined comprehensively. The variable moiety on the phosphonium cation exhibited a chain length of four and five, respectively. The properties were discussed as a function of the side chain, counter-ion and salt addition ([Li][TFSI] or [Li][FSI]). High stability coupled with good flow characteristics were found for the phosphonium IL [P1114][TFSI] and the mixture [P1114][TFSI] + [Li][TFSI], respectively.
| Type: | Article |
|---|---|
| Title: | Novel Phosphonium-Based Ionic Liquid Electrolytes for Battery Applications |
| Location: | Switzerland |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.3390/molecules27154729 |
| Publisher version: | https://doi.org/10.3390/molecules27154729 |
| Language: | English |
| Additional information: | © 2022 MDPI. This is an open access article distributed under the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/). |
| Keywords: | batteries, electrochemistry, ionic liquid, phosphonium |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10153627 |
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