US 12,492,127 B2
Carbon material, method for preparing the same, and secondary battery and electrical device comprising the same
Xieji Lin, Ningde (CN); Rui Shen, Ningde (CN); and Libing He, Ningde (CN)
Assigned to Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong (CN)
Filed by Contemporary Amperex Technology (Hong Kong) Limited, Hong Kong (CN)
Filed on Dec. 2, 2024, as Appl. No. 18/964,714.
Application 18/964,714 is a continuation of application No. PCT/CN2022/134445, filed on Nov. 25, 2022.
Prior Publication US 2025/0091881 A1, Mar. 20, 2025
Int. Cl. C01B 32/21 (2017.01); H01M 4/587 (2010.01)
CPC C01B 32/21 (2017.08) [H01M 4/587 (2013.01); C01P 2002/72 (2013.01); C01P 2002/77 (2013.01); C01P 2004/61 (2013.01); C01P 2006/11 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A carbon material comprising carbon material particles, wherein each of the carbon material particles has at least one pore structure having a pore area of from 0.15 μm2 to 2.0 μm2, the pore structure has a void space, wherein the carbon material has 3R and 2H phases and satisfies 0<I3R(101)/I2H(004)≤0.100, in which I3R(101) is the diffraction peak intensity of 101 crystallographic plane of the 3R phase in the X-ray diffraction pattern of the carbon material, and I2H(004) is the diffraction peak intensity of 004 crystallographic plane of the 2H phase in the X-ray diffraction pattern of the carbon material, the X-ray diffraction pattern of the carbon material does not include a peak position of (012) crystallographic plane of the 3R phase,
the carbon material particle comprises an external zone and an internal zone located inside the external zone, the external zone refers to the zone formed by extending a distance of 0.25 L from a surface of the carbon material particle to an inside of the carbon material particle, L refers to the short axis length of the carbon material particles, the external zone has a total pore area denoted as S1, and the internal zone has a total pore area denoted as S2, wherein S2>S1.