Samsung Sdi Co., Inc.

Sungkyunkwan University

Jaehou Nah

Changsu Shin

Young-Min Kim

Jaemyung Kim

Jongmin Won

Dongwoo Kim

Yeonjoo Choi

Youngugk Kim

Sunil Park

Ilyoung Choi

Yookyung Kim

Dae-Hyeok Lee

Yongseok Kim

Pil Jin Yoo

Narae Kim

Yurim Cha

Eunjoo Lee

Eunji Kang

Doori Oh

Bumjin Chang

Ji Woo Ahn

Jaewon Kim

Deok-Hyun Kim

Jungho Lee

Hyun Soh

Joongho Moon

Soonho Ahn

Jangho Lee

Bongchull Kim

Banseok Lee

Myeong Gyun Nam

Gwan Hyun Choi

Hyejin Kim

Kyeu Yoon Sheem

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.

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 includes a secondary particle in which a plurality of natural graphite primary particles are agglomerated, the plurality of primary particles including natural graphite, and the secondary particle including pores, and an amorphous carbon positioned in the pores, wherein an area of the amorphous carbon is about 10% to about 30% based on a total area of 100% of the negative active material, in a cross-section of the negative active material.

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.

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 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 negative active material for a rechargeable lithium battery includes natural graphite including secondary particles in which a plurality of primary particles are assembled; amorphous carbon on the surface of the primary particles; and a coating layer including amorphous carbon surrounding the secondary particles, wherein the primary particles have an average particle diameter of about 5 &#x3bc;m to about 15 &#x3bc;m, the secondary particles have an average particle diameter of about 8 &#x3bc;m to about 24 &#x3bc;m, and a peak intensity ratio I(002)/I(110) is less than or equal to about 120 as measured by X-ray diffraction.

Negative active material for rechargeable lithium battery, method for preparing same, negative electrode including the same and rechargeable lithium battery including same

A negative active material for a rechargeable lithium battery includes a silicon-carbon composite including crystalline carbon and a silicon particle. The silicon-carbon composite further includes an alkali metal or an alkaline-earth metal. The alkali metal or the alkaline-earth metal is present in the silicon-carbon composite in an amount of greater than or equal to about 500 ppm and less than about 5,000 ppm by weight.

An anode for a lithium rechargeable battery includes an active material layer that includes a metal-carbon composite active material including a carbonaceous active material and at least one active material selected from the group consisting of a metal or a metal oxide, graphite particles having surfaces that are coated or partially coated with a resin f, and a binder that binds and fixes the active material particles and the graphite particles to each other. The anode further includes a collector on which the active material layer is disposed. The resin-coated graphite particles maintain multiple conductive contact surfaces between the active material particles due to adhesiveness of the resin even when the volume of the metal-carbon composite active material particles is changed during charging and discharging, and prevent a reduction of the battery capacity and improve the lifetime of the battery.

Growing community of inventors

Yongin-si, South Korea

Jaehou Nah