Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 70, Issue -, Pages 56-59Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2016.07.003
Keywords
Aqueous electrolyte; Electrochemical window; 1-Butyl-3-methylimidazolium chloride; Ionic liquid; Redox flow batteries
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Aqueous redox flow batteries with high cell voltages represent a promising approach for low-cost, high safety and high energy density applications. However, water breakdown is a major concern because it limits cell voltage. For the first time, we report the use of a highly concentrated aqueous ionic liquid electrolyte, 1-butyl-3-methylimidazolium chloride (BMImCl)-H2O, in an aqueous flow battery operating with a broad electrochemical stability window of 3 V. The proof-of-concept was demonstrated using 2 V redox couples of metal acetylacetonates and a hybrid Zn/Ce flow battery. (C) 2016 Elsevier B.V. All rights reserved.
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