Samsung Sdi Co., Inc.

Jinhyunk Lim

Narae Park

Jinsung Kim

Suhee Han

Jungkang Oh

Jinbum Kim

Jinburn Kim

An electrolyte for a lithium ion secondary battery includes a non-aqueous organic solvent; a lithium salt; and a phosphonitrile fluoride trimer as an additive, and a lithium ion secondary battery comprising the same. The thickness increase rate of a lithium ion secondary battery including the electrolyte is reduced even when the battery is kept at a high temperature. Thus, the thermal stability and durability of the battery are prominently improved. The durability of the battery can be further improved by including a vinylene carbonate or ethylene carbonate group compound in the electrolyte.

Electrolyte for lithium ion secondary battery and lithium ion secondary battery comprising the same

An electrolyte for a lithium ion secondary battery includes a non-aqueous organic solvent; lithium salt; and difluoro oxalato borate and fluoro ethylene carbonate (FEC). The capacity retention property and durability of a lithium ion secondary battery including the electrolyte is excellent even when the battery is left at a high temperature.

Growing community of inventors

Yongin-si, South Korea

Jinhyunk Lim