24389-25-1

Basic information

• Product Name: Phosphorodifluoridic acid, lithium salt
• Synonyms: Lithium Difluorophosphate;lithium phosphorodifluoridate;Li difluorophosphate
• CAS NO: 24389-25-1
• Molecular Formula: F2HO2P.Li
• Molecular Weight: 107.91
• Mol File: 24389-25-1.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: Phosphorodifluoridic acid, lithium salt(CAS DataBase Reference)
• NIST Chemistry Reference: Phosphorodifluoridic acid, lithium salt(24389-25-1)
• EPA Substance Registry System: Phosphorodifluoridic acid, lithium salt(24389-25-1)

Safety Data

• Hazardous Substances Data: 24389-25-1(Hazardous Substances Data)

Usage

General Description

Phosphorodifluoridic acid, lithium salt is a chemical compound consisting of a lithium cation and a phosphorodifluoridic acid anion. It is commonly used as a reagent in organic synthesis and as a source of fluoride ions. The compound has a high affinity for fluorine and is often used in fluoride exchange reactions. Additionally, it can be utilized as an electrolyte in lithium-ion batteries due to its high conductivity and stability. Phosphorodifluoridic acid, lithium salt is also used in the production of various lithium-based compounds and materials. Overall, this chemical has properties that make it useful in a variety of different applications.

Synthetic route

difluorophosphoric acid anhydride (14456-60-1) + lithium fluoride → difluorophosphinic acid lithium salt (24389-25-1)

Conditions	Yield
In neat (no solvent) byproducts: POF3; LiF was added to P2O3F4 at -0.1°C, warmed to ambient temp.; evapd. at 100-120°C;

hexafluorophosphoric acid + phosphorus pentoxide (16752-60-6) + lithium fluoride → difluorophosphinic acid lithium salt (24389-25-1)

Conditions	Yield
at 220℃; for 122h; Autoclave;

lithium hexafluorophosphate (21324-40-3) + lithium carbonate (554-13-2) → difluorophosphinic acid lithium salt (24389-25-1)

Conditions	Yield
at 65℃; for 12h; Temperature; Inert atmosphere; Glovebox;

difluorophosphinic acid lithium salt (24389-25-1) + BF8O8P4(1-)*H(1+) → BF8O8P4(1-)*Li(1+)

Conditions	Yield
In dichloromethane Inert atmosphere;	95%

hydroxide + difluorophosphinic acid lithium salt (24389-25-1) → (monofluorophosphate)(2-)

Conditions	Yield
With lithium hexafluorophosphate In water Kinetics; byproducts: F(1-), H2O; stirred at 0.5-32.8°C; excess of Li(1+) supplied by lithium hexafluorophosphate addn.; react. mixt. were taken in certain time intervals, transferred into an ice-cooled quartz flasks and back-titrated immediately with 0.0585 N soln. of HCl;

pyridine (110-86-1) + lithium hexafluorophosphate (21324-40-3) + difluorophosphinic acid lithium salt (24389-25-1) + 2,4,6-trivinylcyclotriboroxane*pyridine complex → C2H3BF4O2P(1-)*Li(1+)*5C5H5N

Conditions	Yield
Stage #1: pyridine; 2,4,6-trivinylcyclotriboroxane*pyridine complex at 20℃; Inert atmosphere; Stage #2: lithium hexafluorophosphate; difluorophosphinic acid lithium salt at 40℃; for 6h; Inert atmosphere;	17.38 g

triphenylboroxine (3262-89-3) + [1,3]-dioxolan-2-one (96-49-1) + lithium hexafluorophosphate (21324-40-3) + difluorophosphinic acid lithium salt (24389-25-1) → C6H5BF4O2P(1-)*Li(1+)*5C3H4O3

Conditions	Yield
Stage #1: triphenylboroxine; [1,3]-dioxolan-2-one at 20℃; Inert atmosphere; Stage #2: lithium hexafluorophosphate; difluorophosphinic acid lithium salt at 40℃; for 6h; Inert atmosphere;	20.23 g

[1,3]-dioxolan-2-one (96-49-1) + lithium hexafluorophosphate (21324-40-3) + difluorophosphinic acid lithium salt (24389-25-1) + Trimethylboroxine (823-96-1) → CH3BF4O2P(1-)*Li(1+)*5C3H4O3

Conditions	Yield
Stage #1: [1,3]-dioxolan-2-one; Trimethylboroxine at 20℃; Inert atmosphere; Stage #2: lithium hexafluorophosphate; difluorophosphinic acid lithium salt at 40℃; for 6h; Inert atmosphere;	18.37 g

Upstream product

• 21324-40-3 lithium hexafluorophosphate 
• 554-13-2 lithium carbonate 
• 14456-60-1 difluorophosphoric acid anhydride 
• 7789-24-4 lithium fluoride 
• 16752-60-6 phosphorus pentoxide 

Relevant articles and documents

A facile synthesis of non-aqueous LiPO2F2 solution as the electrolyte additive for high performance lithium ion batteries

Constructing a reliable and favorable electrode-electrolyte interface is crucial to utilize the exceptional energy storage capability in commercial lithium-ion batteries. Here, we report a facile synthesis approach for the lithium difluorophosphate (LiPO2F2) solution as an effective film-forming additive via direct adding the Li2CO3 into LiPF6 solution at 45 °C. Benefiting from the significantly reduced interface resistance (RSEI) and charge transfer impedance (Rct) of both the cathode and anode by adding the prepared LiPO2F2 solution into a baseline electrolyte, the cycling performance of the graphite||LiNi0.5Mn0.3Co0.2O2 pouch cell is remarkably improved under all-climate condition.

The first lithium difluorophosphate LiPO2F2 with a neutral polytetrahedral microporous architecture

Herein, we present the first lithium difluorophosphate LiPO2F2 exhibiting a unique polytetrahedral microporous architecture. The unique fluorine coordination environments and interlaced [LiO2]3- straight chains give rise to the neutral pore framework with a 10- membered ring channel along the crystallographic c axis. A variety of measurements have been adopted to systemically characterize LiPO2F2. This work contributes to the structural and functional diversity of phosphate chemistry by the exploration of fascinating difluorophosphates.