Samsung Sdi Co., Inc.

Ilyoung Choi

Jaehou Nah

Dongwoo Kim

Yeonjoo Choi

Yurim Cha

Ji Woo Ahn

Bumjin Chang

Jaewon Kim

Deok-Hyun Kim

Pil Jin Yoo

Joongho Moon

Youngugk Kim

Sunil Park

Hee Seon Choi

Soonbong Choi

Narae Kim

Eunji Kang

Doori Oh

Yookyung Kim

Hyejin Kim

Banseok Lee

A negative active material includes a core having a silicon-carbon composite and a polymer coating layer formed on the core, wherein the negative active material has about 1.02 to about 1.6 of a ratio of height of N1s peak occurring at about 400±about 0.5 eV relative to a height of N1s peak occurring at about 405±about 0.5 eV of a bonding energy, and about 1.02 to about 3.0 of a ratio of a height of C1s peak occurring at about 286.5±about 0.5 eV relative to a height of C1s peak occurring at about 290±about 0.5 eV when an X-ray photoelectron spectroscopy (XPS) is measured.

Negative active material and rechargeable lithium battery including same

A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same, the negative active material including a rod-shaped crystalline carbon; and a silicon-carbon composite.

Negative active material for rechargeable lithium battery and rechargeable lithium battery including same

A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same are disclosed, and the negative active material includes a primary particle of a crystalline carbon-based material and secondary particle that is an assembly of the primary particles, wherein a ratio of an average particle diameter (D50) of the secondary particle relative to an average particle diameter (D50) of the primary particle (average particle diameter (D50) of the secondary particle/average particle diameter (D50) of the primary particle) ranges from about 1.5 to about 5 and an aspect ratio of the primary particle ranges from about 1 to about 7.

Growing community of inventors

Yongin-si, South Korea

Ilyoung Choi