Patent ID: 11961993
Assignee: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 4:
5. The secondary battery according to claim 1, wherein the second negative active material satisfies one or more of the following (1) to (5):
(1) an average particle diameter DV50 of 11 μm-19 μm;
(2) a degree of graphitization of 90%-95%;
(3) a specific surface area (BET) of 0.6 m2/g-2.2 m2/g;
(4) a tap density of 0.7 g/cm3-1.4 g/cm3; and
(5) a powder compacted density under a force of 30,000 N is 1.65 g/cm3-1.85 g/cm3.