| abstract |
The present invention relates to a lithium secondary battery electrolyte and a lithium secondary battery comprising the electrolyte, and more particularly, a non-aqueous organic solvent, a lithium salt, vinyl ethylene carbonate, fluorine ethylene carbonate containing a lithium secondary battery electrolyte and A lithium secondary battery comprising the electrolyte is disclosed.n n n According to the present invention, the battery capacity when the charge / discharge cycle is repeated hundreds of times and the battery capacity of the initial charge / discharge cycle do not show much difference, and the result is excellent in the life test, and the internal pressure in the battery due to gas generation when left at high temperature The increase rate of the battery thickness decreases with increase, and the discharge capacity can be increased when discharged at low temperature. |