| 摘要 |
A crystalline precursor compound is described for manufacturing a lithium transition metal based oxide powder usable as an active positive electrode material in lithium-ion batteries, the precursor having a general formula Li1-a ((Niz (Ni½ Mn½)y Cox) 1-k Ak)1+a O2, wherein x+y+z= 1, 0.1 ≤ x ≤0.4, 0.25 ≤ z ≤ 0.55, A is a dopant, 0 ≤ k ≤ 0.1, and 0.04 ≤ a ≤ 0.50, wherein the precursor has a crystalline size L expressed in nm, with 77-(67*z) ≤ L ≤ 97-(67*z). Also a method is described for manufacturing a positive electrode material having a general formula Li1-a' ((Niz (Ni½ Mn½)y Cox)1-k Ak)1+a' O2, wherein x+y+z=1, 0.1 ≤ x ≤ 0.4, 0.25 ≤ z ≤ 0.55, A is a dopant, 0 ≤k ≤ 0.1, and 0.01 ≤a' ≤0.10 by sintering the crystalline precursor compound in an oxidizing atmosphere at a temperature T between 800 and 1000°C, for a time t between 6 and 36 hrs. |
