409071-16-5

Basic information

• Product Name: Lithium difluoro(oxalato)borate(1-)
• Synonyms: LiDFOB;LiFBOB;Lithium difluoro(oxalato)borate;Lithium difluoro(oxalato)borate(1-);LithiuM Oxalyldifluoroborate;LithiuM difluoro oxalate borate;LIF2OB;LIFOB
• CAS NO: 409071-16-5
• Molecular Formula: C₂BF₂O₄*Li
• Molecular Weight: 143.7678064
• Mol File: 409071-16-5.mol
• Article Data: 18

Chemical Properties

• Melting Point: 265-271°C
• Boiling Point: 275.3℃ at 102kPa
• Appearance: /
• Density: 2.01-2.065g/cm3 at 20℃
• Vapor Pressure: 0.003Pa at 20℃
• Storage Temp.: Inert atmosphere,Room Temperature
• Solubility: Water (Slightly)
• CAS DataBase Reference: Lithium difluoro(oxalato)borate(1-)(CAS DataBase Reference)
• NIST Chemistry Reference: Lithium difluoro(oxalato)borate(1-)(409071-16-5)
• EPA Substance Registry System: Lithium difluoro(oxalato)borate(1-)(409071-16-5)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37/38
• Safety Statements: 26
• WGK Germany: 3
• Hazardous Substances Data: 409071-16-5(Hazardous Substances Data)

Usage

Appearance

White Solid

Uses

Different sources of media describe the Uses of 409071-16-5 differently. You can refer to the following data:
1. LiODFB is used as a thermally stable novel salt and an electrolytic additive for lithium-ion batteries. It facilitates the formation of stable solid electrolyte interphase (SEI) on the negative electrode during the fabrication of the cell. It substantially enhances the cyclic performance, capacity and power retention of the electrochemical system.
2. Lithium difluorooxalatoborate (LIODFB) is a salt for high-performance Li-ion batteries with improved cycle life; power capability; low temperature and high rate performance of the battery. Lithium difluorooxalatoborate can be used as a film-forming additive in the electrolyte of lithium batteries or replace lithium hexafluorophosphate as a conductive salt.

General Description

This product has been enhanced for energy efficiency.

Upstream product

• 144-62-7 oxalic acid 
• 1310-65-2 lithium hydroxide 
• 554-13-2 lithium carbonate 
• 109-63-7 boron trifluoride diethyl etherate 
• 79-37-8 oxalyl dichloride 
• 14720-33-3 fluoroboronic acid 
• 7664-39-3 hydrogen fluoride 
• 553-91-3 lithium oxalate 
• 244761-29-3 lithium bis[1,2-oxalato^(2-)-O,O'] borate 
• 7789-24-4 lithium fluoride 
• 7637-07-2 boron trifluoride 
• 21324-40-3 lithium hexafluorophosphate 
• 18294-04-7 ethanedioic acid bis(trimethylsilyl)ester 

Downstream Products

• 244761-29-3 lithium bis[1,2-oxalato^(2-)-O,O'] borate 

Relevant articles and documents

Characterisation and properties of new ionic liquids with the difluoromono[1,2-oxalato(2-)-O,O′]borate anion

Three ionic liquids with borate anions of low symmetry, tetraethylammonium difluoromono[1,2-oxalato(2-)-O,O′]borate, 1-ethyl-3-methylimidazolium difluoromono[1,2-oxalato(2-)-O,O′]borate, and 1-butyl-3-methylimidazolium difluoromono[1,2-oxalato(2-)-O,O′]borate were synthesised and characterised by physicochemical and electrochemical measurements including thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), cyclic voltammetry (CV), viscosity and conductivity measurements.

Preparation method of lithium difluorooxalate borate

The invention discloses a preparation method of lithium difluorooxalate borate. The preparation method comprises the following steps: (1) placing anhydrous oxalic acid and anhydrous lithium chloride in a reaction vessel, adding an aprotic polar solvent to the reaction vessel under a nitrogen atmosphere, conducting reaction at 10-80 DEG C under a stirring condition for 1-12 h; reacting anhydrous oxalic acid with anhydrous lithium chloride to produce lithium hydrogen oxalate; (2) adding a boron trifluoride compound to the reaction vessel, continuing reaction for 1-12 h to produce lithium difluorooxalate borate; and (3) filtering a reaction solution after the reaction in step (2) at room temperature to remove solid raw materials which not completely react, and then concentrating and recrystallizing a filtrate obtained after filtration, then performing washing and filtration with a non-polar solvent, and finally, carrying out drying to obtain a solid lithium difluorooxalate borate product.The method is mild in reaction, simple in process, low in production cost, economical and environmentally friendly, can obtain high-purity lithium difluorooxalate borate, and is more suitable for industrial production.

Preparation method of lithium difluoro(oxalato)borate

The invention provides a preparation method of lithium difluoro(oxalato)borate (Li[B(C2O4)F2], LiDFOB). The method effectively recycles the by-product LiBF4, and avoids the waste of lithium atoms while improving the yield. The method utilizes the solubility difference of materials to directly filter out the by-product, and is simple in operation. The crude product is subjected to crystallization directly to obtain high purity LiDFOB, thus avoiding the product loss brought about by repeated recrystallization. The method has the advantages of cheap and easily available materials, simple reactionsteps and mild reaction conditions, and is suitable for large-scale industrial production.