Patent ID: 8455143
Filing Date: 2013-06-04
Classification: H01M,Y02E

Abstract:
1. A non-aqueous electrolyte solution for a lithium ion secondary battery, which includes a lithium salt and an organic solvent, wherein the organic solvent includes 100 parts by weight of a carbonate compound, 100 to 250 parts by weight of a propionate-based ester compound and 0.1 to 20 parts by weight of an inhibitor to inhibit decomposition of the propionate-based ester compound, wherein the propionate-based ester compound is expressed by the following Chemical Formula 1 in which R wherein the inhibitor is any one material or a mixture of at least two materials selected from the group consisting of pyrrole, thiophene, aniline, biphenyl, cyclohexyl benzene, fluoro-toluene, tris(trifluoroethyl)phosphate, γ-butyrolactone, γ-valerolactone, butyronitrile, hexanenitrile, succinonitrile, adiponitrile, valeronitrile, siloxane, silane and halogenated compounds thereof, and wherein the carbonate compound is any one material or a mixture of at least two materials selected from the group consisting of ethylene carbonate, 3-fluoroethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate, methylpropyl carbonate, ethylpropyl carbonate, methylethyl carbonate and butylene carbonate.