Lg Chem, Ltd

Ulsan National Institute of Science and Technology

Unist-academy Industry Research Corporation

Unist, Inc.

Mi-Hee Park

Je-Young Kim

Ki-Tae Kim

Jaephil Cho

Soon-Ho Ahn

Min-Ho Seo

Hye-Jung Kim

The present invention relates to negative-electrode active material for a lithium secondary battery exhibiting excellent capacity property and cycle life property, a method of preparing the same, and a lithium secondary battery using the negative-electrode active material, wherein the negative-electrode active material for a lithium secondary battery comprises a nanotube having a tube shape defined by an outer wall with a thickness of nanoscale, the outer wall of the nanotube comprises at least one non-carbonaceous material selected from the group consisting of silicon, germanium and antimony, and an amorphous carbon layer with a thickness of 5 nm or less is formed on the outer wall of the nanotube.

Negative-electrode active material for lithium secondary battery and method of preparing the same

The present invention provides a method of preparing a negative active material for a rechargeable lithium battery, comprising the steps of: mixing a silicon precursor, a surfactant comprising an ammonium halide salt having a organic group, an initiator, and a solvent; heat-treating the mixture; cooling the heat-treated mixture to room temperature; washing the cooled, heat treated mixture; and calcining the washed product.

Method of preparing negative active material containing a carbon-coated silicon core for a rechargeable lithium battery and a rechargeable lithium battery

Growing community of inventors

Gyeongsangnam-do, South Korea

Mi-Hee Park