METHOD FOR PRODUCING SOLUTION OF LITHIUM DIFLUOROBIS(OXALATO)PHOSPHATE

PROBLEM TO BE SOLVED: To provide a solution of lithium difluorobis(oxalato)phosphate that is to be an effective additive for improving performance of nonaqueous electrolyte battery and has small amounts of chlorine compounds and free acids. SOLUTION: The method for producing a solution of lithium di...

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Hauptverfasser: MITSUI TOSHINORI, HATANAKA KANAME
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a solution of lithium difluorobis(oxalato)phosphate that is to be an effective additive for improving performance of nonaqueous electrolyte battery and has small amounts of chlorine compounds and free acids. SOLUTION: The method for producing a solution of lithium difluorobis(oxalato)phosphate includes mixing lithium hexafluorophosphate with oxalic acid in the molar ratio of 1:1.90-1:2.10 in a nonaqueous solvent and reacting the mixture with silicon tetrachloride in the molar ratio of silicon tetrachloride to lithium hexafluorophosphate of 1:0.95-1:1.10. COPYRIGHT: (C)2010,JPO&INPIT