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Issue 29, 2018
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A symmetrical ionic liquid/Li salt system for rapid ion transport and stable lithium electrochemistry

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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

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Article information


Submitted
22 Jan 2018
Accepted
19 Mar 2018
First published
26 Mar 2018

Chem. Commun., 2018,54, 3660-3663
Article type
Communication
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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