Electrochemical intercalation of bis(fluorosulfonyl)amide anions into graphite from aqueous solutions

Graphite intercalation compounds of bis(fluorosulfonyl)amide (FSA-GICs) are electrochemically synthesized in a highly concentrated aqueous solution. While only water decomposition occurs at the graphite electrode in a dilute aqueous solution (1 mol kg−1 NaFSA), redox peaks clearly appear in a highly...

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Bibliographic Details
Published in:Electrochemistry communications 2019-03, Vol.100, p.26-29
Main Authors: Kondo, Yasuyuki, Miyahara, Yuto, Fukutsuka, Tomokazu, Miyazaki, Kohei, Abe, Takeshi
Format: Article
Language:English
Subjects:
Concentrated aqueous solutions
Graphite intercalation compounds
Potential window
Water decomposition
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Summary:Graphite intercalation compounds of bis(fluorosulfonyl)amide (FSA-GICs) are electrochemically synthesized in a highly concentrated aqueous solution. While only water decomposition occurs at the graphite electrode in a dilute aqueous solution (1 mol kg−1 NaFSA), redox peaks clearly appear in a highly concentrated aqueous solution (19 mol kg−1 NaFSA). Under the application of a constant current, the electrode potential reaches 1.7 V (vs. Ag/AgCl), which is far beyond the upper limit of the potential window, in 19 mol kg−1 NaFSA aq., and the formation of FSA-GIC is confirmed by X-ray diffraction patterns. Acceptor-type GICs using organic anions are observed for the first time in highly concentrated aqueous solutions of NaFSA. •Graphite intercalation compound (GIC) of bis(fluorosulfonyl)amide is synthesized.•Highly concentrated aqueous solutions are used as an electrolyte for GIC formation.•Stability of aqueous solutions is determined by the concentration.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2019.01.015