Samsung Sdi Co., Inc.

Doori Oh

Jaehou Nah

Youngugk Kim

Sunil Park

Yookyung Kim

Eunji Kang

Young-Min Kim

Jaewon Kim

Deok-Hyun Kim

Hyun Soh

Changsu Shin

Pil Jin Yoo

Ickkyu Choi

Heeyoung Chu

Yungu Cho

Ilyoung Choi

Jongmin Won

Narae Kim

Hyejin Kim

Yoonyoung Choi

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 composite anode and a secondary battery including the same are disclosed. The composite anode includes a silicon-containing structure; a first carbon material; a second carbon material; and a conductive material, wherein the first carbon material has a specific surface area (BET) value of 1.5 m/g or less, a rate of change of the specific surface area (m/g) to an increase in particle size (μm) is −0.07 to −0.04 m/μm·g, and an area occupied by pores in a cross-section of the first carbon material is 10% or less.

Composite anode, and lithium secondary battery comprising the same

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

Doori Oh