Samsung Sdi Co., Inc.

Duck-chul Hwang

Yong-beom Lee

Won-Il Jung

Jea-Woan Lee

Se-jong Han

Byoung-Hyun Kang

Eui-hwan Song

In-sung Lee

A lithium secondary battery having a winding-type electrode assembly and a case accommodating the electrode assembly, and a method of manufacturing thereof. In the lithium secondary battery, ion-conductive polymer is contained in at least one of a hollow portion of the electrode assembly and an inner space of the case other than the hollow portion. The hollow portion and/or the inner space of the case of the electrode assembly is filled with ion-conductive polymer which can consume the heat generated in the battery and which is changed into a gel-state by an electrolytic solution, to dissipate the heat generated in the battery. Accordingly, the explosion of the battery can be suppressed, thereby preventing the reliability and safety of the battery from lowering.

Lithium secondary battery and method of manufacturing thereof

An organic electrolyte containing an organic solvent mixture and a lithium salt, wherein the organic solvent mixture includes 20 to 60% by volume of ethylene carbonate, 5 to 30% by volume of polypropylene carbonate, and 20 to 70% by volume of chain carbonate. The organic electrolyte improves charge/discharge cycle characteristics while maintaining high discharge capacity and low-temperature discharge characteristics.

Organic electrolyte and lithium secondary battery

Growing community of inventors

Cheonan, South Korea

Duck-chul Hwang