Patent ID: 8367248

Claim:
A negative active material for a rechargeable lithium battery, comprising: a core made of a material including a lithium-vanadium oxide that is capable of performing reversible electrochemical oxidation and reduction; and a coating layer disposed on the surface of the core, the coating layer completely enclosing the core, the coating layer being made of a material including an inorganic oxide, the coating layer including a plurality of particles, diameters of the particles being about 50 nm or less than 50 nm, the coating layer having a thickness of about 50 nm or less, wherein the lithium-vanadium oxide is represented by Chemical Formula I: Li x M y V z O 2+d Chemical Formula I wherein 0.1≦x≦2.5, 0≦y≦0.5, 0.5≦z≦1.5, 0≦d≦0.5, and M is a metal selected from the group consisting of Al, Cr, Mo, Ti, W, Zr, and combinations thereof.