Samsung Sdi Co., Inc.

Dong-Min Im

Han-su Kim

Jin-Sung Kim

Young-min Choi

Myung-dong Cho

Gue-sung Kim

Jung-Joon Park

Jeong-Hee Lee

Hyo-sug Lee

Han-Su Kim

Young-Min Choi

Hyo-Sug Lee

Yong-Nam Ham

Han-soo Kim

Hyo-Sug 802-1405 Doosan Apt Lee

Myung-Dong Cho

Gue-Sun Kim

A cathode active material for a lithium rechargeable battery is provided. The cathode active material is used for a lithium rechargeable battery containing a cathode, an anode, and an electrolytic solution. The cathode active material is composed of 0.5% by weight or less carbonate ion (CO) plus bicarbonate ion (HCO) and 0.1% by weight or less hydroxyl ion (OH). The swelling of lithium battery containing the cathode active material is substantially suppressed when is placed at 60&#xb0; C. or more.

Cathode active material for lithium rechargeable battery and lithium rechargeable battery using the same

An organic electrolytic solution and a rechargeable lithium battery comprising the same is provided. The organic electrolytic solution contains a lithium salt and an organic solvent mixture. The organic solvent mixture is comprised of a solvent with high permittivity, a solvent with a low boiling point, and a cyclic organic compound having at least an oxy-carbonyl group and having a ring structure of 6 units or more. The organic electrolytic solution helps to increase reduction decomposition stability in the lithium battery using the same. As a result, the irreversible capacity of the lithium battery at a first cycle decreases and charge/discharge efficiency and lifespan of the lithium battery increases. In addition, the battery thickness is maintained within a specific range at room temperature after formation and standard charging, which improves the reliability of the lithium battery.

Organic electrolytic solution and lithium battery using the same

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Gweohoon-si, South Korea

Dong-Min Im