Patent ID: 8372549
Filing Date: 2013-02-12
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A solvent system for use in an electrolyte for a lithium secondary battery, comprising a fluoroethylene carbonate solvent and a linear ester solvent, wherein the fluoroethylene carbonate solvent is contained at an amount of 20-60% by volume, based on the total volume of the electrolyte solvent, and the linear ester solvent is contained at an amount of 40-80% by volume, based on the total volume of the electrolyte solvent, and wherein a lithium secondary battery containing an electrolyte comprising the solvent system is able to withstand a temperature of 150° C. for up to 120 minutes without a thermal explosion at a charged state of 4.35 V.