	US 12,215,437 B2
	Gradient single-crystal positive electrode material, and preparation method therefor and use thereof
Jinsuo Li, Xinxiang (CN); Di Cheng, Xinxiang (CN); Yunjun Xu, Xinxiang (CN); Gaofeng Zuo, Xinxiang (CN); Jing Huang, Xinxiang (CN); Xiaojing Li, Xinxiang (CN); Danfeng Chen, Xinxiang (CN); Wanchao Wen, Xinxiang (CN); Yanping Wang, Xinxiang (CN); and Zhengzhong Yin, Xinxiang (CN)
Assigned to HENAN KELONG NEW ENERGY CO., LTD, Henan (CN)
Appl. No. 18/276,000
Filed by HENAN KELONG NEW ENERGY CO., LTD, Xinxiang (CN)
PCT Filed Nov. 11, 2022, PCT No. PCT/CN2022/131473 § 371(c)(1), (2) Date Aug. 4, 2023, PCT Pub. No. WO2023/083319, PCT Pub. Date May 19, 2023.
Claims priority of application No. 202111338747.4 (CN), filed on Nov. 12, 2021.
Prior Publication US 2024/0117520 A1, Apr. 11, 2024
Int. Cl. C01G 51/00 (2006.01); C30B 1/12 (2006.01); C30B 29/22 (2006.01); H01M 4/48 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)

CPC C30B 1/12 (2013.01) [C30B 29/22 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)]

16 Claims

1. A gradient single-crystal positive electrode material, wherein, the gradient single-crystal positive electrode material has a chemical formula of LiNi_xCo_yA_1-x-yO₂@mLi_aZ_bO_c, where 0<x<1, 0<y<1, 0<x+y<1, 0<m<0.05, 0.3<a≤10, 1≤b<4, 1≤c<15; A is at least one of Mn, Zr, Sr, Ba, W, Ti, Al, Mg, Y, and Nb, and Z is at least one of B, Al, Co, W, Ti, Zr, and Si; on the surface of the gradient single-crystal positive electrode material particles, the atomic ratio of the content of Co to the content of Ni+Co+A is greater than 0.4 and less than 0.8, and at a depth 10% of the radius from the surface of the gradient single-crystal positive electrode material particles, the atomic ratio of Co is not less than 0.3.