Patent ID: 9276288
Filing Date: 2016-03-01
CPC Classification: H01M,Y02E

Claim Text:
1. A nonaqueous electrolyte rechargeable battery comprising: a positive electrode occluding and discharging lithium ions, the positive electrode containing an olivine-type iron phosphate; a negative electrode occluding and discharging lithium ions; and a nonaqueous electrolyte containing an additive to generate solvation of the lithium ions and a polycyclic aromatic hydrocarbon to fix and stabilize solvated lithium ions, the additive including an organic solvent having a donor number of 18 to 24, a content of the polycyclic aromatic hydrocarbon being greater than 0% and equal to or less than 2.0% of a total mass of the nonaqueous electrolyte; wherein the nonaqueous electrolyte contains at least one of an oxalate complex and an oxalate derivative complex.