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Issue 2, 2016
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Towards an all-copper redox flow battery based on a copper-containing ionic liquid

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Abstract

The first redox flow battery (RFB), based on the all-copper liquid metal salt [Cu(MeCN)4][Tf2N], is presented. Liquid metal salts (LMS) are a new type of ionic liquid that functions both as solvent and electrolyte. Non-aqueous electrolytes have advantages over water-based solutions, such as a larger electrochemical window and large thermal stability. The proof-of-concept is given that LMSs can be used as the electrolyte in RFBs. The main advantage of [Cu(MeCN)4][Tf2N] is the high copper concentration, and thus high charge and energy densities of 300 kC l−1 and 75 W h l−1 respectively, since the copper(I) ions form an integral part of the electrolyte. A Coulombic efficiency up to 85% could be reached.

Graphical abstract: Towards an all-copper redox flow battery based on a copper-containing ionic liquid

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Supplementary files

Article information


Submitted
12 Aug 2015
Accepted
30 Oct 2015
First published
30 Oct 2015

Chem. Commun., 2016,52, 414-417
Article type
Communication
Author version available

Towards an all-copper redox flow battery based on a copper-containing ionic liquid

S. Schaltin, Y. Li, N. R. Brooks, J. Sniekers, I. F. J. Vankelecom, K. Binnemans and J. Fransaer, Chem. Commun., 2016, 52, 414
DOI: 10.1039/C5CC06774J

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