Patent ID: 11967704
Assignee: HANSOL CHEMICAL CO.,LTD
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A negative electrode active material for lithium secondary batteries, the negative electrode active material comprising:
a porous core in which scaly nano-silicon fragments are connected in an entangled manner; and
a shell layer covering the core,
wherein the shell layer includes a carbon-based material and silicon, and
the shell layer has a thickness in a range of more than 10 to less than 60% with respect to an average particle diameter D50 of the negative electrode active material,
wherein the carbon-based material is graphite and amorphous carbon,
wherein the graphite is scaly graphite fragments,
wherein the amorphous carbon is distributed between the scaly graphite fragments, and the scaly nano-silicon fragments are combined on upper and lower surfaces of the scaly graphite fragments in a regular or irregular shape.