Patent ID: 7438994
Filing Date: 2008-10-21
Classification: H01M,Y02E,Y02P

Abstract:
1. A non-aqueous electrolyte secondary battery comprising a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte solution, wherein the positive electrode has a theoretical capacity per unit area from 3.0 to 4.5 mAh/cm the non-aqueous electrolyte solution contains solvents consisting of ethylene carbonate, ethylmethyl carbonate, and dimethyl carbonate, and LiPF volume ratios of the three solvents relative to a total of the three solvents in the non-aqueous electrolyte solution are respectively 10 to 20 % for the ethylene carbonate, 10 to 20 % for the ethylmethyl carbonate, and 60 to 80 % for the dimethyl carbonate, in which a volume ratio of the dimethyl carbonate to the ethylmethyl carbonate is in a range from 3.25 to 7.50; and a concentration of the LiPF