Patent ID: 7507501
Filing Date: 2009-03-24
Classification: C01G,C01P,H01M,Y02E

Abstract:
1. A positive active material composition for a rechargeable lithium battery, comprising: a positive active material comprising at least one lithiated compound; and an amorphous additive compound uniformly mixed throughout the entire positive active material, said amorphous additive compound consisting of a thermal-absorbent element-included hydroxycarbonate, wherein said amorphous additive compound comprises an amount at or between 0.1 weight % and 0.3 weight % based on the weight of the positive active material composition and wherein the thermal-absorbent element is an element selected from the group consisting of Mg, Al, Co, K, Na, Ca, Si, Ti, Sn, V, Ge, Ga, As, and Zr, and wherein the at least one lithiated compound is a compound selected from the group consisting of compounds represented by the formulas 1 to 13: wherein, 0.95≦x≦1.1, 0≦y≦0.5, 0≦z≦05, 0≦α≦2, M is one element selected from the group consisting of Al, Ni, Co, Mn, Cr, Fe, Mg, Sr, V, and rare earth elements, A is selected from the group consisting of O, F, S, and P, and X is selected from the group consisting of F, S, and P.