US 12,142,753 B2
Cathode and electrochemical device
Feilong Guo, Ningde (CN); Juan Jin, Ningde (CN); Xinbing Chen, Ningde (CN); and Hongming Yu, Ningde (CN)
Assigned to DONGGUAN POWERAMP TECHNOLOGY LIMITED, Dongguan (CN)
Appl. No. 16/964,746
Filed by DONGGUAN POWERAMP TECHNOLOGY LIMITED, Dongguan (CN)
PCT Filed May 22, 2020, PCT No. PCT/CN2020/091800
§ 371(c)(1), (2) Date Jul. 24, 2020,
PCT Pub. No. WO2021/012768, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 201910655730.8 (CN), filed on Jul. 19, 2019.
Prior Publication US 2021/0313563 A1, Oct. 7, 2021
Int. Cl. H01M 4/36 (2006.01); H01M 4/131 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/364 (2013.01) [H01M 4/131 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01); H01M 2220/30 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A cathode, comprising:
a cathode current collector; and
a cathode active material layer disposed on a surface of the cathode current collector, wherein the cathode active material layer comprises a first particle and a second particle, the first particle comprising a first secondary particle composed of a third particle, the third particle being a first primary particle, the first particle having an average particle size of 5 μm to 20 μm, the third particle having an average particle size of 600 nm to 700 nm, the second particle comprising a fourth particle and/or a second secondary particle composed of the fourth particle, the fourth particle being a second primary particle, the second particle having an average particle size of 3 μm to 5 μm, the fourth particle having an average particle size of 1 μm to 5 μm; and
wherein a peak intensity ratio of the (003) diffraction peak of the X-ray diffraction of the second particle to the first particle is 1.03 to 1.6, and a half peak width difference of the (003) diffraction peak of the X-ray diffraction of the first particle and the second particle is 0.002° to 0.008°.