Lithium bis(trifluoromethanesulfonyl)imide

Lithium bis(trifluoromethanesulfonyl)imide, often simply referred to as LiTFSI, is a hydrophilic salt with the chemical formula LiC2F6NO4S2.[1] It is commonly used as Li-ion source in electrolytes for Li-ion batteries as a safer alternative to commonly used lithium hexafluorophosphate.[2] 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
3D model (JSmol)
RTECS number
  • XR2775000
UNII
Properties
LiC
2
F
6
NO
4
S
2
Molar mass 287.075 g/mol
Appearance White solid
Odor odorless
Density 1.33 g/cm3
Melting point 236 °C (457 °F; 509 K)
soluble in water
Hazards
Safety data sheet
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.[3][4]

References

  1. Pubchem. "90076-65-6 | C2F6LiNO4S2 - PubChem". pubchem.ncbi.nlm.nih.gov. Retrieved 2017-03-11.
  2. Kalhoff, Julian; Bresser, Dominic; Bolloli, Marco; Alloin, Fannie; Sanchez, Jean-Yves; Passerini, Stefano (2014-10-01). "Enabling LiTFSI-based Electrolytes for Safer Lithium-Ion Batteries by Using Linear Fluorinated Carbonates as (Co)Solvent". ChemSusChem. 7 (10): 2939–2946. doi:10.1002/cssc.201402502. ISSN 1864-564X. PMID 25138922.
  3. Suo, Liumin; Borodin, Oleg; Gao, Tao; Olguin, Marco; Ho, Janet; Fan, Xiulin; Luo, Chao; Wang, Chunsheng; Xu, Kang (2015-11-20). ""Water-in-salt" electrolyte enables high-voltage aqueous lithium-ion chemistries". Science. 350 (6263): 938–943. doi:10.1126/science.aab1595. ISSN 0036-8075. PMID 26586759.
  4. Smith, Leland; Dunn, Bruce (2015-11-20). "Opening the window for aqueous electrolytes". Science. 350 (6263): 918. doi:10.1126/science.aad5575. ISSN 0036-8075. PMID 26586752.
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