Lg Chem, Ltd

Kwon-Young Choi

Jae-Seung Oh

Byoung-Bae Lee

Yeon-Suk Hong

Sang-Hyun Lee

Hyo-Jin Lee

Dong-Su Kim

Kyung-Hwan Jung

Hye-Yeong Sim

Disclosed is a non-aqueous electrolyte for a lithium secondary battery and a lithium secondary battery comprising the same. The non-aqueous electrolyte including an ionizable lithium salt and an organic solvent may further include (a) 1 to 10 parts by weight of a compound having a vinylene group or vinyl group per 100 parts by weight of the non-aqueous electrolyte, and (b) 10 to 300 parts by weight of a dinitrile compound having an ether bond per 100 parts by weight of the compound having the vinylene group or vinyl group. The lithium secondary battery comprising the non-aqueous electrolyte may effectively suppress the swelling and improve the charge/discharge cycle life.

Non-aqueous electrolyte for lithium secondary battery and lithium secondary battery comprising the same

Disclosed is an electrolyte. The electrolyte includes an amide compound and an ionizable lithium salt. The amide compound has a specific structure in which an amine group is substituted with at least one alkoxyalkyl group and at least one halogen atom is present. The electrolyte has good thermal and chemical stability, a low resistance and a high ionic conductivity. In addition, the electrolyte has a high upper limit of electrochemical window due to its improved oxidation stability. Therefore, the electrolyte can be useful for the fabrication of an electrochemical device. Further disclosed is an electrochemical device including the electrolyte.

Electrolyte including amide compound and electrochemical device including the same

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Daejeon, South Korea

Kwon-Young Choi