Patent ID: 8026004
Filing Date: 2011-09-27
Classification: C01G,C01P,H01M,Y02E,Y02P

Abstract:
1. A method for preparing negative active material for a rechargeable lithium battery, the method comprising: preparing a mixed powder by mixing a vanadium-containing raw powder and a lithium-containing raw powder, or by mixing a vanadium-containing raw powder, a lithium containing raw powder, and an M element-containing raw powder, where the M element includes at least one of Al, Cr, Mo, Ti, W, and Zr; subjecting the mixed powder to a first heat-treatment at about 500° C. to about 900° C. for about 1 to about 5 hours under a first atmosphere to obtain a lithium-vanadium-based oxide powder; press-forming the lithium-vanadium-based oxide powder; subjecting the press-formed powder to a second heat-treatment at about 900° C. to about 1400° C. for about 3 to about 10 hours under a second atmosphere that is a reducing atmosphere; and grinding the heated press-formed powder.