Samsung Sdi Co., Inc.

Sungkyunkwan University

Changsu Shin

Jaehou Nah

Young-Min Kim

Jaemyung Kim

Jongmin Won

Hyeri Eom

Sora Lee

Dae-Hyeok Lee

Changui Jeong

SungSu A Kim

Yongseok Kim

Pil Jin Yoo

Youngugk Kim

Heeyoung Chu

Soonho Ahn

Sunil Park

Chul Youm

Soojeong Lee

Yookyung Kim

Doori Oh

Eunji Kang

Uisong Do

Sangeun Park

Myeong Gyun Nam

Gwan Hyun Choi

Hyunki Park

Chang Ui Jeong

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

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 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 composite includes a core and a coating layer around (surrounding) the core. The core includes amorphous carbon and silicon nanoparticles, the coating layer includes amorphous carbon, and an adjacent distance between the silicon nanoparticles is less than or equal to about 100 nm.

Negative active material composite for rechargeable lithium battery, method of preparing the same, and negative electrode 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.

A negative active material for a rechargeable lithium battery and a rechargeable lithium battery, the negative active material including a composite including silicon particles, metal particles, and a first amorphous carbon; and a second amorphous carbon surrounding on the composite.

A negative active material, a lithium battery including the negative active material, and a method of preparing the negative active material. The negative active material includes: a core particle including a silicon based alloy; carbon nanoparticles disposed on a surface of the core particle; and an amorphous carbonaceous coating layer disposed on at least a portion of a surface of the core particle. The negative active material may improve the lifetime characteristics of the lithium batteries.

Negative active material, lithium battery including the negative active material, and method of preparing the negative active material

Provided is an anode active material, including: an amorphous carbon material in which the ratio of moieties having a distance dof 3.77 &#x212b; or more between crystal planes is 4% to 15% based on the entire crystal plane distance distribution. When the anode active material is used, the lifespan characteristics of a lithium battery may be improved while exhibiting high capacity.

Anode active material and preparation method therefor

A negative active material and a rechargeable lithium battery, the negative active material including a silicon-carbon composite, the silicon-carbon composite including crystalline carbon; amorphous carbon; and silicon nanoparticles having a needle shape, a flake shape, a sheet shape, or a combination thereof, wherein the silicon nanoparticles have a D50 particle diameter of 5 nm to 150 nm and an aspect ratio of 4 to 10.

A composite electrode active material includes: a core portion including a silicon-based alloy; and a shell portion disposed on the core portion and including a coating layer, wherein the coating layer includes an amorphous carbon material and a lithium titanium oxide. A lithium battery including the composite electrode active material and a method of manufacturing the composite electrode active material are also provided.

Composite electrode active material, lithium battery including the same, and preparation method thereof

A composite anode active material includes a metallic core alloyable with lithium, and a coating layer on the metallic core, the coating layer including lithium fluoride (LiF) nanoparticles and a carbonaceous material.

Composite anode active material, lithium battery including the same, and method of preparing the composite anode active material

Disclosed is a secondary battery including a negative electrode, a positive electrode, and an electrolyte between the negative electrode and the positive electrode, wherein the negative electrode includes a negative electrode active material including: an Si&#x2014;Fe based alloy core; a carbonaceous first coating layer disposed on the core; and a second coating layer which is disposed on the first coating layer and includes carbon nanotubes (CNTs) having an average length of about 1.0 nm to about 2.0 &#x3bc;m.

Growing community of inventors

Yongin-si, South Korea

Changsu Shin