| 摘要 |
The present invention relates to a powderous electrode active material of lithium transition metal oxide Li a M b O2 in which 0.9 < a < 1.1, 0.9 < b < 1.1 and (i) M comprises at least two transition metal selected from Mn, Co and Ni or (ii) M=A z A'z'M'1-z-z, M'=Mn x Ni y Co1-x-y, 0<=y<=1, 0<=x<=1, 0<0.1, z+z'<0.02, A is a metal chosen from Al, Mg, Ti, Cr and A' is a further dopant chosen from F, CI, S, Zr, Ba, Y, Ca, B, Be, Sn, Na and Zn. The powderous electrode active material has particles with a distribution of sizes and and a composition of M varies with the size of the particles. The present invention also relates to an electrochemical cell, particularly a rechargeable lithium battery, using the powderous electrode active material . |
