Preparation method of lithium bisfluorosulfonyl imide

A technology of lithium bisfluorosulfonyl imide and lithium bisfluorosulfonyl imide, which is applied in the field of preparation of lithium bisfluorosulfonyl imide, can solve the problems of difficult purification, separation, combustion or explosion of the product, Achieve the effect of easy industrial preparation and simple process route

Active Publication Date: 2016-07-06
浙江盛美リ電材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has the following disadvantages: lithium perchlorate and lithium tetrafluoroborate as the reaction raw materials have great solubility in the solvent, resulting in lithium perchlorate and lithium tetrafluoroborate contained in the final lithium bisfluorosulfonyl imide product. Lithium fluoroborate is difficult to separate, and the product is not easy to purify
Moreover, friction or impact of lithium perchlorate can easily cause combustion or explosion, which brings greater safety hazards

Method used

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  • Preparation method of lithium bisfluorosulfonyl imide
  • Preparation method of lithium bisfluorosulfonyl imide
  • Preparation method of lithium bisfluorosulfonyl imide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Under the protection of dry nitrogen, add 219g (1mol) of bisfluorosulfonimide potassium salt, 194g (1mol) of lithium bisoxalate borate, and 1000ml of dimethyl carbonate into a three-necked flask. Stir and react at room temperature for 12 hours. Filter under reduced pressure to remove insoluble After concentrating the filtrate to about 150 ml under reduced pressure, an equal volume of dichloromethane is added, and the mixture is cooled to room temperature and filtered, washed, and dried to obtain 150 g of lithium bisfluorosulfonimide.

[0032] The product has been inspected by infrared, at 1387cm -1 ,1223cm -1 ,1185cm -1 ,852cm -1 ,777cm -1 , 573cm -1 By comparing the standard spectra of bisfluorosulfonimide, it is determined as the characteristic group of bisfluorosulfonimide lithium.

Embodiment 2

[0034] Under the protection of dry nitrogen, add 219g (1mol) of bisfluorosulfonimide potassium salt, 144g (1mol) of lithium oxalate difluoroborate and 1000ml of dimethyl carbonate into a three-necked flask, stir and react at room temperature for 12 hours, and remove by filtration under reduced pressure. Insoluble matter, the filtrate was concentrated to about 150ml under reduced pressure, and then an equal volume of dichloromethane was added. After cooling to room temperature, it was filtered, washed and dried to obtain 138g of lithium bisfluorosulfonimide.

[0035] The product has been inspected by infrared, at 1387cm -1 ,1223cm -1 ,1185cm -1 ,852cm -1 ,777cm -1 ,573cm -1 By comparing the standard spectra of bisfluorosulfonimide, it is determined as the characteristic group of bisfluorosulfonimide lithium.

Embodiment 3

[0037] Add 219g (1mol) of bisfluorosulfonimide potassium salt, 194g (1mol) of lithium bisoxalate borate and 1200ml of ethyl methyl carbonate to a three-necked flask under the protection of dry nitrogen. Stir and react at room temperature for 12 hours. Filter under reduced pressure to remove insoluble After the filtrate was concentrated to about 165ml under reduced pressure, an equal volume of dichloromethane was added, and after it was cooled to room temperature, it was filtered, washed, and dried to obtain 158g of lithium bisfluorosulfonimide.

[0038] The product has been inspected by infrared, at 1387cm -1 ,1223cm -1 ,1185cm -1 ,852cm -1 ,777cm -1 , 573cm -1 By comparing the standard spectra of bisfluorosulfonimide, it is determined as the characteristic group of bisfluorosulfonimide lithium.

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Abstract

The present invention provides a preparation method of imidodisulfuryl fluoride lithium, comprising: obtaining an imidodisulfuryl fluoride lithium product by a metathesis reaction of lithium bis(oxalate)borate or lithium difluoro(oxalato)borate and bis(fluorosulfonyl)imide potassium salt in a solvent. The preparation method of imidodisulfuryl fluoride lithium in the present invention is simple in process route and easy to realize industrialized preparation.

Description

Technical field [0001] The invention relates to a preparation method of bisfluorosulfonimide lithium, in particular to the preparation of bisfluorosulfonimide by the metathesis exchange reaction of lithium bisoxalate borate or lithium oxalate difluoroborate and potassium bisfluorosulfonylimide Lithium amide. Background technique [0002] Lithium bisfluorosulfonimide can be used in many fields. For example, it can be used as an electrolyte additive for lithium-ion batteries to improve the cycle performance of lithium-ion batteries. It can also be used as an electrolyte for primary batteries; it can be used as a polymerization catalyst; Antistatic agent used in the industrial field. [0003] The lithium bisfluorosulfonimide referred to in the present invention is a compound having the following structure: [0004] [0005] Current studies have shown that the application of lithium bisfluorosulfonimide in the electrolyte of rechargeable lithium batteries can effectively reduce the hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/093
CPCC01B21/0935C01P2002/82C01P2002/86
Inventor 张先林沈鸣杨志勇吴国栋周立星
Owner 浙江盛美リ電材料有限公司
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