Patent ID: 6783890
Filing Date: 2004-08-31
Classification: C01G,C01P,H01M,Y02E

Abstract:
A positive active material for a rechargeable lithium battery comprising:a core comprising at least one compound represented by Formula 1; and an active metal oxide shell formed on the core, the metal oxide being capable of stabilizing a structure of the active material wherein the metal of the metal oxide shell is a metal selected from the group consisting of at least one of Mg, Al, Co, K, Na, Ca, Mn, Ni, B, Sr, Ba, Ti, V, Cr, Fe, and Cu; Formula 1 LiAlâˆ’xâˆ’yBxCyO2, where 0&lE;x&lE;0.3, 0 &lE;y&lE;0.01; A is an element selected from the group consisting of Co and Mn; B is an element selected from the group consisting of Ni, Co, Mn, B, Mg, Ca, Sr, Ba, Ti, V, Cr, Fe, Cu and Al; and C is an element selected from the group consisting of Ni, Co, Mn, B, Mg, Ca, Sr, Ba, Ti, V, Cr, Fe, Cu and Al.