Samsung Sdi Co., Inc.

Jiwoon Lee

Jinhyon Lee

Jongki Lee

Minje Park

Eun-Young Goh

Sungyong Kim

Sangin Park

Jeong-Ju Cho

Eunyoung Goh

Kiyoung Jeong

Jongho Jeon

Jinseon Shin

A rechargeable battery includes an electrode assembly and first and second lead tabs. The electrode assembly includes at least one separator between a first electrode and a second electrode. The first and second lead tabs are respectively connected to the first and second electrodes and are drawn out of a case. The electrode assembly includes a first assembly having a first length in a first direction and a second assembly having a second length in the first direction shorter than the first length. The first assembly includes at least one first uncoated tab protruding from the first electrode and connected to the first lead tab, and at least one second uncoated tab protruding from the second electrode and connected to the second lead tab. The second assembly includes the at least one second uncoated tab.

Rechargeable battery

A lithium secondary battery includes a thick-film negative electrode having a current density of about 4.0 mA/cmto about 7.0 mA/cmand a low-viscosity electrolytic solution having a viscosity of about 3 cP or less. Since the electrolytic solution includes a propionate-based ester compound, impregnation of the electrolytic solution in electronic devices having a thick-film negative electrode and lifespan characteristics of the devices may be improved.

Lithium secondary battery

Growing community of inventors

Yongin-si, South Korea

Jiwoon Lee