Lithium secondary battery
AssigneeLG Chem, Ltd.
InventorsJong-Ho Jeon, Yong-Gon Lee, Seung-Woo Chu, Shul-Kee Kim, Hyun-Yeong Lee, Jae-Deok Jeon
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Abstract
The present invention provides a lithium secondary battery, comprising a cathode, an anode, a non-aqueous solution containing a lithium salt and an organic solvent, and a safety vent for removing increased internal pressure, the non-aqueous solution having the prescribed composition and the safety vent having the prescribed operational characteristics. The lithium secondary battery of the present invention can ensure its safety even when overcharged.
Claims9
A lithium secondary battery, comprising a cathode, an anode, a non-aqueous solution containing a lithium salt and an organic solvent, and a safety vent for removing increased internal pressure,
- wherein the safety vent has a vent hole whose opening pressure is in the range of 3.5 to 15 kgf/cm2;
- and the non-aqueous solution further contains a mixture of halogen-substituted or unsubstituted toluene and halogen-substituted or unsubstituted xylene as an additive, the mixture having the halogen-substituted or unsubstituted toluene and the halogen-substituted or unsubstituted xylene in a weight ratio of 1:0.1 to 1:0.5.
Dependencies are inferred from the claim text.