Electrolyte for lithium secondary battery, lithium secondary battery containing the same

A lithium battery comprising:

• a positive electrode;
• a negative electrode;
• a separator between the positive electrode and the negative electrode;
• and
• an electrolyte containing a lithium salt, a solvent component and an additive comprising one or more selected from the group consisting of the following compounds
• wherein R1, R2 and R3 are each independently hydrogen, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 20 carbon atoms, an aryl group having 6 to 30 carbon atoms, or an arylalkyl group having 6 to 30 carbon atoms, and
• wherein the electrolyte comprises the additive in an amount of about 0.2 to 3.0 wt %, based on the total weight of the electrolyte.