US 12,255,323 B2
Silicon oxide/carbon composite negative electrode material and preparation method therefor, and lithium-ion battery
Jingwei Wang, Guangdong (CN); Chunlei Pang, Guangdong (CN); Tengyu Liang, Guangdong (CN); Jianguo Ren, Guangdong (CN); Min Yue, Guangdong (CN); and Xueqin He, Guangdong (CN)
Assigned to BTR NEW MATERIAL GROUP CO., LTD., Guangdong (CN)
Appl. No. 17/286,882
Filed by BTR NEW MATERIAL GROUP CO., LTD., Guangdong (CN)
PCT Filed May 15, 2020, PCT No. PCT/CN2020/090682
§ 371(c)(1), (2) Date Apr. 20, 2021,
PCT Pub. No. WO2020/238658, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 201910450180.6 (CN), filed on May 28, 2019.
Prior Publication US 2021/0384500 A1, Dec. 9, 2021
Int. Cl. H01M 4/48 (2010.01); H01M 4/04 (2006.01); H01M 4/38 (2006.01); H01M 4/583 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/483 (2013.01) [H01M 4/0471 (2013.01); H01M 4/386 (2013.01); H01M 4/583 (2013.01); H01M 4/621 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A silicon oxide/carbon composite negative electrode material, wherein the silicon oxide/carbon composite negative electrode material is of a secondary particle, mainly composed of a SiOx/C material, wherein the SiOx/C material comprises a SiOx particle and a carbon layer coated on a surface of the SiOx particle, wherein the SiOx particle comprises Si microcrystals, wherein a D50 of the SiOx particle is 0.5 μm<D50<3.0 μm, and wherein a D90 of the SiOx particle is D90<10 μm and a volume of the SiOx particle having a particle size below 1.0 μm comprises 25%-60% of a total volume of the SiOx particle.