Samsung Sdi Co., Inc.

Bong-Chull Kim

Se-Ho Park

Cheol-Hee Hwang

Dong-Yung Kim

Hyun-Jun Choi

Sang-Il Han

Woo-Cheol Shin

Joon-Sup Kim

Ho-Seok Yang

Moon-Sung Kim

Duck-Hyun Kim

E-Rang Cho

Min-Young Lee

Young-Hwan Park

Young Sam Park

Kyeong-Min Jeong

Jae-Hou Nah

Jeong-Hye Lee

Su-Ho Song

In-Ho Jung

Byung-Hwa Kim

Na-Rae Won

Jong-Chan Kim

In an aspect, a negative active material for a rechargeable lithium battery that includes a silicon-based active material including a core including carbon and SiOparticles (0.5&#x2266;x&#x2266;1.5); and a coating layer surrounding the core, and a negative electrode and a rechargeable lithium battery including the same are provided.

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

Embodiments of the present invention are directed to negative active materials for lithium rechargeable batteries and to lithium rechargeable batteries including the negative active materials. The negative active material includes a crystalline carbon material having pores, and amorphous conductive nanoparticles in the pores, on the surface of the crystalline carbon, or both in the pores and on the surface of the crystalline carbon. The conductive nanoparticles have a FWHM of about 0.35 degrees (&#xb0;) or greater at the crystal plane that produces the highest peak as measured by X-ray diffraction.

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

A negative electrode for a rechargeable lithium battery, including a negative active material layer including a polymer binder including a repeating unit represented by the following Chemical Formula 1 or the following Chemical Formula 2 and a Si-based negative active material; and a current collector supporting the negative active material layer, is provided: 

Negative electrode for rechargeable lithium battery, method of preparing same and rechargeable lithium battery including same

An electrolyte for a rechargeable lithium battery includes a lithium salt, an organic solvent and an additive. The organic solvent includes a sulfur-containing compound represented by Chemical Formula 1, and the additive includes a phosphazene compound represented by Chemical Formula 2. A rechargeable lithium battery including the electrolyte may have improved performance and safety. In Chemical Formulae 1 and 2, the substituents are as defined in the detailed description.

Electrolyte for rechargeable lithium battery and rechargeable lithium battery including the same

A negative active material for a rechargeable lithium battery includes: a crystalline carbon core including pores; an amorphous carbon shell positioned on the core surface; metal nanoparticles dispersed inside the pores; and amorphous carbon inside the pores, wherein a first particle diameter difference (D50&#x2212;D10) of the nanoparticles is from about 70 to about 150 nm and the second particle diameter difference (D90&#x2212;D50) of the nanoparticles is from about 440 to about 520 nm.

Negative active material for rechargeable lithium battery and rechargeable lithium battery comprising same

A lithium secondary battery including a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, a separator separating the positive electrode from the negative electrode and an electrolyte. The negative electrode active material includes a graphite core particle, a carbon layer coating the graphite core particle, and metal particles dispersed in the carbon layer.

Negative electrode active material, negative electrode having the same and lithium secondary battery

A negative active material for a rechargeable lithium battery includes a core including crystalline carbon, a metal nano particle and a MOnano particle (where x is from 0.5 to 1.5, and M is Si, Sn, In, Al, or a combination thereof) disposed on the core surface, and a coating layer including an amorphous carbon surrounding the core surface, the metal nano particle and the MOnano particle. A lithium rechargeable battery includes the negative active material.

A lithium secondary battery includes a positive electrode having a positive electrode active material, a negative electrode having a negative electrode active material, a separator separating the positive electrode from the negative electrode, and an electrolyte. The negative electrode active material includes a graphite core particle, at least one metal particle located on the graphite core particle, and a polymer film coating the graphite core particle and the at least one metal particle. The polymer includes a polyimide- or polyacrylate-based polymer.

A rechargeable lithium battery including: a negative electrode having a composite negative active material of a metal and a carbonaceous material; a positive electrode having a mixed positive active material of about 90 to 99 wt % of a first positive active material selected from cobalt, manganese, phosphate acid-based, or combinations thereof and about 1 to about 10 wt % of a nickel-based second positive active material; and a non-aqueous electrolyte.

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Yongin-si, South Korea

Bong-Chull Kim