US 11,936,042 B2
Cathode material, and electrochemical device including the same
Wenyuan Liu, Ningde (CN); Gang Peng, Ningde (CN); Ye Lang, Ningde (CN); and Leimin Xu, Ningde (CN)
Assigned to NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
Appl. No. 17/252,144
Filed by NINGDE AMPEREX TECHNOLOGY LIMITED, Ningde (CN)
PCT Filed Mar. 31, 2020, PCT No. PCT/CN2020/082246
§ 371(c)(1), (2) Date Dec. 14, 2020,
PCT Pub. No. WO2021/012705, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 201910654647.9 (CN), filed on Jul. 19, 2019.
Prior Publication US 2021/0367236 A1, Nov. 25, 2021
Int. Cl. H01M 4/525 (2010.01); H01M 4/36 (2006.01); H01M 4/48 (2010.01); H01M 4/485 (2010.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/364 (2013.01); H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A cathode material, comprising:
a plurality of first particles, wherein each first particle comprises a secondary particle composed of a plurality of third particles, each third particle is a first primary particle, the plurality of first particles have an average particle diameter of 8 μm to 20 μm, the plurality of third particles have an average particle diameter of 200 nm to 700 nm, and the first particle comprises a first lithium-containing transition metal oxide; and
a plurality of second particles, wherein each second particle comprises a fourth particle and/or a secondary particle composed of a plurality of fourth particles, the fourth particle is a second primary particle, the second particle has an average particle diameter of 3 μm to 5 μm, the fourth particle has an average particle diameter of 800 nm to 5 μm, and the second particle comprises a second lithium-containing transition metal oxide,
wherein a ratio of the average particle diameter of the plurality of first particles to the average particle diameter of the plurality of third particles is 20 to 50; and
wherein a ratio Ds/Dp is 0.15 to 0.7, Ds is an average particle diameter of the plurality of second particles, and Dp is an average particle diameter of the plurality of first particles.