NEGATIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY, METHOD OF PREPARING SAME, AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME

摘要

Negative active materials for rechargeable lithium batteries, manufacturing methods thereof, and rechargeable lithium batteries including the negative active materials are provided. The negative active material includes a compound represented by the Formula Li_1+xV_1-x-yM_yO_2+z. In one embodiment, the compound has an average particle size ranging from about 50 nm to about 30 mum. In another embodiment, the negative active material has a ratio of (003) plane diffraction intensity to (104) plane diffraction intensity ranging from about 1:1 to about 1:0.01 when measured using a Cu K alpha X-ray. According to another embodiment, after five charge/discharge cycles performed at 0.5C, a specific surface area of the negative active material increases to less than about 20 times a specific surface area before the five charge/discharge cycles. The negative active materials may improve battery capacity, and cycle-life characteristics.