Samsung Sdi Co., Inc.

Dae-Hyeok Lee

Young-Min Kim

Jungho Lee

Jaehou Nah

Changsu Shin

Jaemyung Kim

Youngugk Kim

Heeyoung Chu

Chul Youm

Jongmin Won

A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same, the negative active material including secondary particles of agglomerated primary particles, the primary particles including Si particles and a first ceramic oxide on a surface of the Si particles; and amorphous carbon, wherein the amorphous carbon surrounds a surface of the primary particles and a surface of the secondary particles.

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, the negative active material including secondary particles of agglomerated primary particles, the primary particles including Si particles with SiC on a surface of the Si particles; and an amorphous carbon surrounding the secondary particles, wherein a peak intensity ratio (I/I) of a peak intensity (I)) at a Si (111) plane relative to a peak intensity (I) at a SiC (111) plane is about 5 to about 50 measured by X-ray diffraction analysis using a CuKα ray.

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

A negative active material for a rechargeable lithium battery and a rechargeable lithium battery including the same, the negative active material including a Si-carbon composite that includes Si nanoparticles and an amorphous carbon, wherein the negative active material has a sphericity of 0.7 or more, and a BET specific surface area of 10 m/g or less.

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Yongin-si, South Korea

Dae-Hyeok Lee