Lithium hexafluoroantimonate

• Catalog: OFC18424174
• CAS: 18424-17-4
• Category: Inorganic Fluorides
• Synonyms: Lithium;Hexafluoroantimony(1-)
• Purity: 97%
• MDL Number: MFCD00042319

• IUPAC Name: lithium;hexafluoroantimony(1-)
• InChI: InChI=1S/6FH.Li.Sb/h6*1H;;/q;;;;;;+1;+5/p-6
• InChI Key: YVBBFYDVCPCHHG-UHFFFAOYSA-H
• Isomeric SMILES: [Li+].F[Sb-](F)(F)(F)(F)F
• EC Number: 670-363-3

• Molecular Formula: LiSbF6
• Molecular Weight: 242.68
• Appearance: Powder
• Solubility: Very soluble in water.
• Storage: Ambient temperatures.
• Stability: Hygroscopic

• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 7
• Rotatable Bond Count: 0
• Exact Mass: 241.91023
• Monoisotopic Mass: 241.91023
• Topological Polar Surface Area: 0Ų
• Heavy Atom Count: 8
• Formal Charge: 0
• Complexity: 62.7

Case Study

Application of Lithium Hexafluoroantimonate in the Fabrication of Poly(trimethylene carbonate)-Based Solid Polymer Electrolytes

Silva MM, et al. Solid State Sciences, 2006, 8(11), 1318-1321.

Lithium hexafluoroantimonate (LiSbF₆) was employed as the guest salt in the preparation of novel solid polymer electrolytes using poly(trimethylene carbonate) (PTMC) as the host matrix. Electrolytes were synthesized via co-dissolution of PTMC and LiSbF₆ in acetonitrile, followed by solvent casting to form flexible, transparent films. The salt concentration was varied by adjusting the monomer-to-lithium ratio (n = 5-100), enabling tunable ionic coordination. The resulting films were subjected to conductivity testing, cyclic voltammetry, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). These experimental procedures revealed favorable electrochemical and thermal stability, suggesting that LiSbF₆ effectively enhances ionic transport in PTMC-based matrices. This study demonstrates a systematic approach for developing solvent-cast polymer electrolytes using LiSbF₆ for potential application in solid-state lithium batteries.

Structural Characterization of Lithium Hexafluoroantimonate-Doped Di-Ureasil Ormolytes for Solid Electrolyte Applications

Rodrigues L.C, et al. Solid State Ionics, 2012, 226, 7-14.

Lithium hexafluoroantimonate (LiSbF₆) was employed as a doping agent in the synthesis of di-ureasil-based hybrid electrolytes via a sol-gel process. The di-urea cross-linked poly(oxyethylene)/siloxane framework (d-U(2000)) served as the host matrix. Transparent, flexible xerogel films were fabricated with varying molar ratios of oxyethylene units per Li⁺ ion (n = ∞ to 2.5). The resulting materials exhibited high thermal stability (≥200 °C), wide electrochemical windows (≥6.0 V), and a maximum ionic conductivity of 1.32 × 10⁻⁵ S cm⁻¹ at n = 30. FTIR and NMR analyses revealed Li⁺ coordination to urea carbonyl oxygens across all compositions, while SbF₆⁻ primarily formed ion pairs with Li⁺. Amorphous, non-porous structures predominated at n < 200, with POE crystallites observed only at n = 200, highlighting the critical role of LiSbF₆ in modulating electrolyte structure and performance.