Patent ID: 6733927
Filing Date: 2004-05-11
Classification: H01M,Y02E,Y10T

Abstract:
A non-aqueous electrolyte secondary battery comprising a chargeable and dischargeable positive electrode, a non-aqueous electrolyte containing a lithium salt, and a chargeable and dischargeable negative electrode,wherein at least one of the positive electrode, the non-aqueous electrolyte, and the negative electrode contains a mixture of two or three phosphates selected from the group consisting of: a phosphate represented by formula (1): â€ƒwherein R1a, R2a, and R3a are independently selected from an aliphatic hydrocarbon group having seven to twelve carbon atoms; a phosphate represented by formula (2): â€ƒwherein R1b and R2b are independently selected from an aliphatic hydrocarbon group having one to twelve carbon atoms or an aromatic hydrocarbon group; and a phosphate represented by formula (3): â€ƒwherein R1c represents an aliphatic hydrocarbon group having one to twelve carbon atoms or an aromatic hydrocarbon group, wherein the hydrocarbon R1a, R2a, R3a, R1b, R2b and R1c in the formulae (1), (2) and (3) have the same number of carbon atoms in the mixture and each phosphate in the mixture comprises not less than 30 volume % based on a total volume of the mixture.