Patent ID: 9123973
Filing Date: 2015-09-01
Classification: H01M,Y02E

Abstract:
1. An electrolyte for a lithium secondary battery comprising a mixture of: a non-aqueous organic solvent comprising one or more of a cyclic carbonate-based solvent, a halogen substituted ethylene carbonate-based solvent, a lactone-based solvent, an ether-based solvent, a ketone-based solvent, a linear carbonate solvent and a fluorine-based solvent represented by the following chemical formula 4: wherein Rf a lithium salt; a fluoroalkyl ether in an amount of from 10% to 40% by volume and represented by the following chemical formula: wherein Rf a phosphazene in an amount of from 3% to 10% by volume represented by chemical formula 2: wherein R and a solvent comprising at least one ester in an amount of from 20% to 70% by volume; wherein the at least one ester is represented by the following chemical formula 3: wherein R wherein the ratio of the fluoroalkyl ether to the sum of the phosphazene compound and the solvent comprising at least one ester is from about 0.15:1 to about 1.5:1.