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

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

Uses

Used in Organic Synthesis:
Phosphorodifluoridic acid, lithium salt is used as a reagent for its ability to facilitate chemical reactions in organic synthesis, particularly in fluoride exchange reactions.
Used in Lithium-Ion Batteries:
In the energy industry, phosphorodifluoridic acid, lithium salt is used as an electrolyte in lithium-ion batteries due to its high conductivity and stability, which are crucial for efficient battery performance.
Used in Production of Lithium-Based Compounds and Materials:
Phosphorodifluoridic acid, lithium salt is utilized in the production of various lithium-based compounds and materials, contributing to the development of new technologies and products that require lithium components.

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

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

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.

Champ de forces de symetrie locale des composes oxyfluores du phosphore(V)-I. Les difluorodioxophosphates (DFP) alcalins

Alkali phosphorofluoridates (DFP) were prepared by reaction between phosphoryl difluoride oxide P2O3F4 and alkali fluorides.The caesium salt was obtained by reaction between HPO2F2 and caesium chloride.The aim was to establish a coherent description of the various vibrational modes of the PO2F2- ion, so as to use it for more complex molecules involving either of the PO2 and PF2 groups.For that purpose a local symmetric force field (LSFF) was chosen and good agreement found between calculated and observed frequencies.This investigation provided force constant values for the PO2F2- ion in RbPO2F2, and enabled us to test the transferability of the force field to the DFP whose cristallographic structures are known.

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.