“Water-in-ionic liquid” solutions towards wide electrochemical stability windows for aqueous rechargeable batteries

Title
“Water-in-ionic liquid” solutions towards wide electrochemical stability windows for aqueous rechargeable batteries
Authors
헨켄스마이어디억Yonglai ZhangRuijie YeRolf HempelmannRuiyong Chen
Keywords
“Water-in-ionic liquid” electrolytes; Electrochemical stability windows; Aqueous rechargeable batteries
Issue Date
2018-02
Publisher
Electrochimica acta
Citation
VOL 263-52
Abstract
Several hydrophilic ionic liquids dissolved in water with different molalities are studied as “water-in-ionic liquid” supporting electrolytes. They exhibit wide electrochemical stability window from 3 to 4.4  V, high ionic conductivities and good flowability, making them promising supporting electrolytes for aqueous high-voltage rechargeable batteries. In such supporting electrolytes, enhanced redox activities of lithium insertion/extraction in anodic TiO2 film at low negative potential and Fe3+/Fe2+ couple at moderate positive potential were observed. Cyclability of an aqueous TiO2/Fe2+ hybrid battery is demonstrated with a voltage of 1.7  V.
URI
http://pubs.kist.re.kr/handle/201004/67844
ISSN
0013-4686
Appears in Collections:
KIST Publication > Article
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