Samsung Sdi Co., Inc.

Dong-Yung Kim

Se-Ho Park

Cheol-Hee Hwang

Bong-Chull Kim

Hyun-Jun Choi

Su-Ho Song

In-Ho Jung

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

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 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 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.

Growing community of inventors

Yongin-si, South Korea

Dong-Yung Kim