Lithium hexafluorophosphate Property

Melting point:

200 °C (dec.) (lit.)

Density 

1.5 g/mL (lit.)

Flash point:

25 °C

storage temp. 

Inert atmosphere,Room Temperature

solubility 

H2O: slightly soluble(lit.)

form 

Powder

Specific Gravity

1.50

color 

APHA: <50

Water Solubility 

soluble

Sensitive 

Hygroscopic

Exposure limits

ACGIH: TWA 2.5 mg/m3
NIOSH: IDLH 250 mg/m3

Stability:

Stable, but readily hydrolyzes upon exposure to water or moist air. Incompatible with strong oxidizing agents, strong acids.

CAS DataBase Reference

21324-40-3(CAS DataBase Reference)

EPA Substance Registry System

Phosphate(1-), hexafluoro-, lithium (21324-40-3)

Safety

Hazard Codes 

C,Xi,T,F

Risk Statements 

34-24-22-37-10-48/23/24/25-35-11

Safety Statements 

26-36/37/39-45-28A-16

RIDADR 

UN 3260 8/PG 1

WGK Germany 

3

F 

3-10

Hazard Note 

Irritant/Hygroscopic

TSCA 

Yes

HazardClass 

8

PackingGroup 

II

HS Code 

28269020

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H301Toxic if swalloed

H314Causes severe skin burns and eye damage

H372Causes damage to organs through prolonged or repeated exposure

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P314Get medical advice/attention if you feel unwell.

Lithium hexafluorophosphate Chemical Properties,Usage,Production

synthesis

The first is the wet method. In the method, lithium salt is dissolved in anhydrous hydrofluoric acid to form LiF·HF solution, and then PF5 gas is introduced for reaction to produce lithium hexafluorophosphate crystals. After separation and drying, the product is obtained; the second is dry method. The method is to treat LiF with anhydrous HF to form porous LiF, and then pass PF5 gas for reaction to obtain the product. The third is the solvent method. The method is to make lithium salt react with alkali metal salt, ammonium salt or organic amine salt of fluorophosphoric acid in an organic solvent to crystallize, thereby preparing lithium hexafluorophosphate product.

Chemical Properties

white crystalline powder

Uses

Lithium hexafluorophosphate (LiPF6) is the most widely used solute in liquid and gelled-type electrolytes，which has good solubility in various solvents such as PC (propylene carbonate) .

Uses

Used as an electrolyte in Li-ion batteries.Lithium hexafluorophosphate is used as an electrolyte in lithium batteries, ceramic industries and for welding electrode manufacturing. It is also used in commercial secondary batteries, prism spectrometer and x-ray monochromator. Further, it catalyzes the tetrahydropyranylation of tertiary alcohol.

Uses

The solutions of LiPF₆ in alkyl carbonates find applications as electrolytes in lithium ion batteries and the use of high quality battery grade electrolytes having extremely low water (<15 ppm) and hydrogen fluoride (<50 ppm) contents are critical for achieving high electrochemical performance.

Definition

ChEBI: Lithium hexafluorophosphate is an inorganic lithium salt having hexafluorophosphate(1-) as the counterion. It is an electrolyte used in lithium-ion batteries. It contains a hexafluorophosphate(1-).

General Description

Lithium hexafluorophosphate solution in ethylene carbonate and ethyl methyl carbonate is a class of electrolytic solution that can be used in the fabrication of lithium-ion batteries. Lithium-ion batteries consist of anode, cathode, and electrolyte with a charge-discharge cycle. These materials enable the formation of greener and sustainable batteries for electrical energy storage.

Flammability and Explosibility

Non flammable

Battery Materials

Lithium hexafluorophosphate (LiPF6) is the most widely used salt in the electrolytes for commercial Li-ion cells. It is commonly used as the electrolytic solution in lithium-ion rechargeable batteries. It is hydrolyzed by the small amounts of water contained in the electrolytic solution to produce fluoride and other ions.
According to the ionics studies on the limiting properties in various solvents, this excellent conductivity results from the combination of its ionic mobility and dissociation constant, although in neither category does LiPF6 stand at the most outstanding position:
Average ion mobility: LiBF4 > LiClO4 > LiPF6 > LiAsF6 > LiTf >
LiIm Dissociation constant: LiTf < LiBF4 < LiClO4 < LiPF6 < LiAsF6 < LiIm
The reversed order in the above two properties clearly demonstrates the conflicting nature of the requirements and the advantage of the well-balanced properties of LiPF6.
Lithium hexafluorophosphate is one of the most used electrolyte salt in the production of lithium ion batteries. Electrolyte Lithium Hexafluorophosphate for Lithium-ion Batteries has the ability of dissolving in binary and ternary solvents which cyclic carbonates and linear carbonates can be given as example. After lithium hexafluorophosphate dissolves in these solvents, it shows high electrolytic conductivity and thermal stability which is a desired property for lithium ion batteries.