Lithium bis(trifluoromethanesulfonyl)imide

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.

Lithium bis(trifluoromethane­sulfonyl)imide

Names
IUPAC name Lithium bis(trifluoromethylsulfonyl)azanide
Other names LiTFSI
Identifiers
CAS Number	90076-65-6 Y
3D model (JSmol)	Interactive image
ChemSpider	2058897
ECHA InfoCard	100.101.430
EC Number	415-300-0
PubChem CID	3816071
RTECS number	XR2775000
UNII	9Y730392A5 Y
CompTox Dashboard (EPA)	DTXSID8044468
InChI InChI=1S/C2F6NO4S2.Li/c3-1(4,5)14(10,11)9-15(12,13)2(6,7)8;/q-1;+1 Key: QSZMZKBZAYQGRS-UHFFFAOYSA-N
SMILES [Li+].C(F)(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F
Properties
Chemical formula	LiC 2F 6NO 4S 2
Molar mass	287.09 g/mol
Appearance	White solid
Odor	odorless
Density	1.33 g/cm3
Melting point	236 °C (457 °F; 509 K)
Solubility in water	80.65% (22 °C)[1]
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H310, H311, H314, H372, H373, H412
Precautionary statements	P260, P262, P264, P264+P265, P270, P273, P280, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P319, P321, P330, P361+P364, P363, P405, P501
Safety data sheet (SDS)
Related compounds
Other anions	Bistriflimide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

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]