Electrolyte for Non-Aqueous Electrolyte Battery and Non-Aqueous Electrolyte Lithium Battery
AssigneeCentral Glass Company, Limited
InventorsHitoshi OOMURO, Shoichi TSUJIOKA
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Abstract
An electrolyte for a non-aqueous electrolyte battery includes a non-aqueous organic solvent and at least lithium hexafluorophosphate as a solute, characterized by further including 10 to 1000 mass ppm of a phosphorus-containing acidic compound and 0.01 to 10.0 mass % of a difluorophosphate. The phosphorus-containing acidic compound is preferably at least one selected from the group consisting of HPF6, HPO2F2, H2PO3F and H3PO4. By the use of such an electrolyte, it is possible to provide the non-aqueous electrolyte lithium battery capable of maintaining high discharge capacity even after repeated charge/discharge cycles under a high temperature environment.
Claims5
An electrolyte for a non-aqueous electrolyte battery, comprising a non-aqueous organic solvent and at least lithium hexafluorophosphate as a solute,
- wherein the electrolyte further comprises 10 to 1000 mass ppm of a phosphorus-containing acidic compound and 0.01 to 10.0 mass % of a difluorophosphate;
- wherein the phosphorus-containing acidic compound is at least one selected from the group consisting of HPF6, HPO2F2, H2PO3F and H3PO4;
- and
- wherein hydrogen fluoride is contained in an amount of less than 10 mass ppm in the electrolyte.
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Dependencies are inferred from the claim text.