NEGATIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING SAME

A rechargeable lithium battery includes a negative active material including: a secondary particle including a core in which a plurality of primary particles are agglomerated, the primary particles including a natural graphite; and a coating layer including amorphous carbon and surrounding the core, wherein a Raman peak intensity ratio of a D peak (1350 cmto 1370 cm) to a D′ peak (1570 cmto 1620 cm) (I/I) of the negative active material is about 3.2 to about 3.8, and a lattice constant La of the negative active material is about 30 nm to about 45 nm.