Patent ID: 11967718
Assignee: NINGDE AMPEREX TECHNOLOGY LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 4:
5. An electrochemical device, comprising a positive electrode, an electrolytic solution, and a negative electrode; wherein the negative electrode comprises a negative active material layer and a negative current collector, and the negative active material layer comprises the negative active material;
wherein, the negative active material comprises a carbon material; and 6<Gr/K<16,
wherein, Gr is a graphitization degree of the carbon material, measured by 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; and
wherein

La/S>20,

wherein
La is a size of a crystal of the carbon material along a horizontal axis as measured by 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
La is greater than 50; and
wherein the electrolytic solution comprises fluoroethylene carbonate, 1,3-propane sultone, and succinonitrile.