METHOD FOR PRODUCING LITHIUM DIFLUOROBIS(OXALATO)PHOSPHATE SOLUTION

Disclosed is a method for producing a lithium difluorobis(oxalato)phosphate solution, which is characterized by that lithium hexafluorophosphate and oxalic acid are mixed together in a nonaqueous solvent, in a manner that the molar ratio of lithium hexafluorophosphate to oxalic acid falls within a r...

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Bibliographische Detailangaben
Hauptverfasser:	HATAKENAKA, KANAME, MITSUI, TOSHINORI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM APPARATUS THEREFOR BASIC ELECTRIC ELEMENTS CAPACITORS CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE CHEMISTRY COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM ELECTRICITY GENERAL METHODS OF ORGANIC CHEMISTRY INORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	Disclosed is a method for producing a lithium difluorobis(oxalato)phosphate solution, which is characterized by that lithium hexafluorophosphate and oxalic acid are mixed together in a nonaqueous solvent, in a manner that the molar ratio of lithium hexafluorophosphate to oxalic acid falls within a range of 1:1.90 to 1:2.10, and furthermore silicon tetrachloride is added to this, in a manner that the molar ratio of lithium hexafluorophosphate to silicon tetrachloride falls within a range of 1:0.95 to 1:1.10, thereby conducting a reaction. The lithium diffuorobis(oxalato)phosphate solution produced by this method has low contents of chlorine compounds and free acids. Therefore, it can become an additive that is effective for improving performance of nonaqueous electrolyte batteries.