Lithium hexafluorophosphate

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Lithium hexafluorophosphate
Lithium hexafluorophosphate.png
Identifiers
CAS number 21324-40-3 YesY
PubChem 23688915
ChemSpider 146939 YesY
Jmol-3D images Image 1
Properties
Molecular formula LiPF6
Molar mass 151.905 g/mol
Appearance white powder
Density 1.5 g/cm3
Melting point 200 °C
Solubility in water soluble
Hazards
MSDS External MSDS
GHS pictograms The corrosion pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word DANGER
GHS hazard statements H314
GHS precautionary statements P280, P310, P305+351+338
EU Index Not listed
R-phrases R22, R24, R34
S-phrases S26, S36, S37, S39, S45
Flash point Non-flammable
Related compounds
Other anions Lithium tetrafluoroborate
Other cations Sodium hexafluorophosphate
Potassium hexafluorophosphate
Ammonium hexafluorophosphate
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Lithium hexafluorophosphate is an inorganic compound with the formula LiPF6 that is commonly used salt in commercial lithium batteries. This white crystalline powder is used in commercial secondary batteries, an application that exploits its high solubility in nonpolar solvents. Specifically, solutions of lithium hexafluorophosphate in propylene carbonate with dimethoxyethane serves as an electrolyte in lithium batteries.[1] This application also exploits the inertness of the hexafluorophosphate anion toward strong reducing agents, such as lithium metal.

LiPF6 also catalyses the tetrahydropyranylation of tertiary alcohols.[2]

This salt is composed of the lithium cation and hexafluorophosphate anion (PF6-). The salt deteriorates at 70°C according to the following equation: LiPF6(s)-> LiF(s) + PF5(g). [3]

References[edit]

  1. ^ "Challenges for Rechargeable Li Batteries" John B. Goodenough, Youngsik Kim Chem. Mater., 2010, volume 22, pp 587–603. doi:10.1021/cm901452z
  2. ^ Nao Hamada; Sato Tsuneo (2004). "Lithium Hexafluorophosphate-Catalyzed Efficient Tetrahydropyranylation of Tertiary Alcohols under Mild Reaction Conditions". Synlett (10): 1802. doi:10.1055/s-2004-829550. 
  3. ^ "Xu, Kang. "Nonaqueous Liquid Electrolytes for Lithium-Based Rechargeable Batteries."Chemical Reviews 104.10 (2004): 4303-418. <http://pubs.acs.org/doi/pdf/10.1021/cr030203g>"