US 12,017,926 B2
Ni-rich ternary cathode material, preparation method and application thereof
Yougen Tang, Changsha (CN); Ze Feng, Changsha (CN); Haiyan Wang, Changsha (CN); Dan Sun, Changsha (CN); and Shan Zhang, Changsha (CN)
Assigned to CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Filed by CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Filed on Aug. 18, 2021, as Appl. No. 17/405,317.
Claims priority of application No. 202010835567.6 (CN), filed on Aug. 19, 2020.
Prior Publication US 2022/0055915 A1, Feb. 24, 2022
Int. Cl. C01G 53/04 (2006.01); H01M 10/0525 (2010.01)
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
OG exemplary drawing
 
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.