Patent ID: 11936045
Assignee: NINGDE AMPEREX TECHNOLOGY LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A negative active material, comprising: a carbon material; and 6.1≤Gr/K≤15.3,
wherein, Gr is a graphitization degree of the carbon material, measured by means of X-ray diffraction; and
K is a ratio Id/Ig of a peak intensity Id of the carbon material at a wavenumber of 1250 cm−1 to 1650 cm−1 to a peak intensity Ig of the carbon material at a wavenumber of 1500 cm−1 to 1650 cm−1, and is measured by using Raman spectroscopy, and K is 0.06 to 0.15;
wherein 4.7≤Lc/S≤8.9,
wherein
Lc is a size of a crystal of the carbon material along a vertical axis as measured by means of X-ray diffraction, and is measured in units of nm;
S is a ratio of a peak area C004 of a (004) surface to a peak area C110 of a (110) surface of the negative active material as measured by using an X-ray diffraction pattern; and

22≤Lc<45.