CPC C01G 53/04 (2013.01) [H01M 10/0525 (2013.01); C01P 2002/01 (2013.01); C01P 2002/74 (2013.01); C01P 2004/03 (2013.01); C01P 2004/04 (2013.01)] | 13 Claims |
1. A method for preparing a Ni-rich ternary cathode material, comprising:
mixing a Ni—Co—Mn ternary cathode material precursor, a metal boride as a modifier, and a lithium-derived material to obtain a mixed material, and sintering the mixed material, to obtain the Ni-rich ternary cathode material,
wherein the Ni—Co—Mn ternary cathode material precursor is NixCoyMn1-x-y(OH)2, where 0.8≤x<1, 0<y<0.2, and x+y<1, and
the sintering comprises a first sintering and a second sintering sequentially carried out in oxygen, wherein the first sintering is conducted at a first temperature of 550-700° C. for 1-5 h, and the second sintering is conducted at a second temperature of 750-850° C. for 5-15 h, a first heating rate for heating to the first temperature is not more than 2° C./min, and a second heating rate for heating to the second temperature is not more than 0.75° C./min.
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