| 摘要 |
Nano-sized structured dense and spherical layered positive active materials provide high energy density and high rate capability electrodes in lithium-ion batteries. Such materials are spherical second particles made from agglomerated primary particles that are Li1+alpha(NixCoyMnz)1-tMtO2-dRd, where M is selected from can be Al, Mg, Fe, Cu, Zn, Cr, Ag, Ca, Na, K, In, Ga, Ge, V, Mo, Nb, Si, Ti, Zr, or a mixture of any two or more thereof, R is selected from F, Cl, Br, I, H, S, N, or a mixture of any two or more thereof, and 0<=alpha<=0.50; 0<x<=1; 0<=y<=1; 0<z<=1; 0<=t<=1; and 0<=d<=0.5. Methods of preparing such materials and their use in electrochemical devices are also described.
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