METHOD FOR PREPARING LITHIUM BIS(FLUOROSULFONYL)IMIDE

The present invention relates to a method for preparing lithium bis(fluorosulfonyl)imide, comprising the following steps: contacting bis(fluorosulfonyl)imide with a lithium base in a solvent selected from among carbonates, ethers and nitriles to obtain a mixture comprising lithium bis(fluorosulfonyl...

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Bibliographische Detailangaben
Hauptverfasser:	COUTURIER, Jean-Luc, LOGETTE, Sébastien, JOUANNEAU, Julien
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS THEREOF ELECTRICITY INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	The present invention relates to a method for preparing lithium bis(fluorosulfonyl)imide, comprising the following steps: contacting bis(fluorosulfonyl)imide with a lithium base in a solvent selected from among carbonates, ethers and nitriles to obtain a mixture comprising lithium bis(fluorosulfonyl)imide and water; diafiltration of the mixture across a nanofiltration membrane so as to obtain a lithium bis(fluorosulfonyl)imide-enriched and water-depleted concentrate on the one hand and a a lithium bis(fluorosulfonyl)imide-depleted and water-enriched permeate on the other hand. The present invention also relates to a method for preparing a Li-ion battery.