Issue 29, 2018

A symmetrical ionic liquid/Li salt system for rapid ion transport and stable lithium electrochemistry

Abstract

Contrary to the accepted wisdom that avoids cation symmetry for the sake of optimum electrolyte properties, we reveal outstanding behaviour for the diethylpyrrolidinium cation ([C2epyr]), in combination with the bis(fluorosulfonyl)imide (FSI) anion and Li[FSI]. The equimolar [C2epyr][Li][FSI]2 is a liquid with high conductivity, high Li transference number and >90% lithium metal cycling efficiency. The high level of performance for these electrolytes invites consideration of a new class of electrolytes for lithium batteries.

Graphical abstract: A symmetrical ionic liquid/Li salt system for rapid ion transport and stable lithium electrochemistry

Supplementary files

Article information

Article type
Communication
Submitted
22 Jan 2018
Accepted
19 Mar 2018
First published
26 Mar 2018

Chem. Commun., 2018,54, 3660-3663

Author version available

A symmetrical ionic liquid/Li salt system for rapid ion transport and stable lithium electrochemistry

D. Al-Masri, R. Yunis, A. F. Hollenkamp and J. M. Pringle, Chem. Commun., 2018, 54, 3660 DOI: 10.1039/C8CC00531A

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