Lithium bis(trifluoromethanesulfonyl)imide, often simply referred to as LiTFSI, is a
hydrophilic salt with the chemical formula LiC2F6NO4S2.[2] It is commonly used as Li-ion source in
electrolytes for Li-ion batteries as a safer alternative to commonly used
lithium hexafluorophosphate.[3] It is made up of one Li cation and a
bistriflimide anion.
Because of its very high solubility in water (> 21
m), LiTFSI has been used as lithium salt in water-in-salt electrolytes for
aqueous lithium-ion batteries.[4][5]
References
^Gilbert, William J. R.; Safarov, Javid; Minnick, David L.; Rocha, M. Alejandra; Hassel, Egon P.; Shiflett, Mark B. (2017-06-05). "Density, Viscosity, and Vapor Pressure Measurements of Water + Lithium Bis(trifluoromethylsulfonyl)imide Solutions". Journal of Chemical & Engineering Data. 62 (7). American Chemical Society (ACS): 2056–2066.
doi:
10.1021/acs.jced.7b00135.
ISSN0021-9568.