Patent ID: 11876217
Assignee: SK ON CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A lithium secondary battery, comprising:
a cathode;
a separator; and
an anode including an anode current collector and an anode active material layer formed on the anode current collector and facing the cathode with the separator interposed therebetween,
wherein the anode active material layer includes,
a first anode active material layer formed on the anode current collector and including a first anode active material and a first anode binder containing a styrene-butadiene-based rubber (SBR) binder; and
a second anode active material layer formed on the first anode active material layer so that the first anode active material layer is interposed between the anode current collector and the second anode active material layer, the second anode active material layer including a second anode active material and a second anode binder containing an acryl-based binder, wherein the acryl-based binder does not include SBR therein, and
each of the first anode active material and the second anode active material includes a silicon-based active material and a graphite-based material and contains 2 to 9.5 parts by weight of silicon with respect to the 100 part by weight of the graphite-based active material.