US 11,955,635 B1
Single crystal multi-element positive electrode material, preparation method therefor, and lithium ion battery
Yiseng Hu, Beijing (CN); Shanshan Li, Beijing (CN); Shunlin Song, Beijing (CN); Yafei Liu, Beijing (CN); and Yanbin Chen, Beijing (CN)
Assigned to Beijing Easpring Material Technology Co., Ltd., Beijing (CN)
Filed by Beijing Easpring Material Technology Co., Ltd., Beijing (CN)
Filed on Oct. 30, 2023, as Appl. No. 18/497,404.
Application 18/497,404 is a continuation of application No. PCT/CN2022/144086, filed on Dec. 30, 2022.
Claims priority of application No. 202211659558.1 (CN), filed on Dec. 22, 2022.
Int. Cl. H01M 4/525 (2010.01); C30B 1/12 (2006.01); C30B 29/22 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [C30B 1/12 (2013.01); C30B 29/22 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 20 Claims
OG exemplary drawing
 
1. The single-crystal multi-element cathode material, wherein the ratio of the length of the longest diagonal line to the length of the shortest diagonal line, which is measured by SEM, of the single crystal particles of the single-crystal multi-element cathode material is defined as roundness R, and R≥1;
D10, D50 and D90 of the single crystal particles of the single-crystal multi-element cathode material satisfy: K90=(D90−D10)/D50, and the product of K90 and R is 1.20-1.40.