Patent ID: 6333128
Filing Date: 2001-12-25
Classification: C01G,C01P,H01M,Y02E

Abstract:
A lithium secondary battery comprising, as a positive electrode active material, a composite oxide powder having a median diameter of 3.0 through 20.0 .mu.m and a content of particles with a grain size of 1 .mu.m or less of 10% by volume or less and being represented by a composition formula, Li.sub.a Co.sub.b M.sub.c Ni.sub.1-b-c O.sub.2, in which M is at least one element selected from the group consisting of Ca, Sc, V, Cu, Zn, Ga, Ge, Y, Nb, Ru, Rh, Pd, Ag, Cd, In and Sn; 0.ltoreq.a.ltoreq.1.2; 0.01.ltoreq.b.ltoreq.0.4; 0.01.ltoreq.c.ltoreq.0.4; and 0.02.ltoreq.b+c.ltoreq.0.5.