Samsung Sdi Co., Inc.

Yookyung Kim

Jaehou Nah

Youngugk Kim

Sunil Park

Eunji Kang

Doori Oh

Young-Min Kim

Jaewon Kim

Deok-Hyun Kim

Jungho Lee

Changsu Shin

Pil Jin Yoo

Jongmin Won

Narae Kim

Ilyoung Choi

Banseok Lee

Hyejin Kim

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, including a first active material including a silicon core and a carbon coating layer on the core, a carbon second active material having an aspect ratio of about 4 to about 100, and a crystalline carbon third active material.

A negative active material, including a silicon-carbon composite including silicon and amorphous carbon, a metal oxide, and a metal silicate.

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Yongin-si, South Korea

Yookyung Kim