NEGATIVE ACTIVE MATERIAL AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME

The present invention relates to negative active material and a rechargeable lithium battery including same, the negative active material including secondary particles, each of which is a spheroidized aggregate of a plurality of primary particles; tertiary natural graphite particles, each of which is an aggregate of the secondary particles, artificial graphite on surfaces of the primary and surfaces of the secondary particles, and NbO.