POLYCRYSTALLINE COBALT-NICKEL-MANGANESE TERNARY POSITIVE MATERIAL, PREPARATION METHOD THEREOF AND LITHIUM ION SECONDARY BATTERY

摘要

A polycrystalline CO-Ni-Mn ternary anode material is consisted of at least two crystalline bases selected from the group consisting of Li z CoO 2 , Li z NiO 2 , Li z MnO 2 , Li z Co 1-(x+y) Ni x Mn y O 2 , Li z Ni x Mn 1 -xO 2 , Li z Co x Ni 1-x O 2 and Li 2 MnO 3 , a compact density thereof is 3,9~4.3g/cm3, a capacity thereof is at least 145mAh/g at a discharging rate of 0.5~1C, and a circulation capacity retention after 300 circles is above 90%. The anode material prepared by high temperature fusion shows good electrochemical performance, high volume energy density, high security, and low cost. The anode material is employed to prepare a lithium ion secondary battery.