Patent ID: 11916225
Assignee: SK ON CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 10:
11. A lithium secondary battery, comprising:
a cathode including a cathode current collector, a cathode active material base layer formed on the cathode current collector and a cathode active material coating layer formed on a surface of the cathode active material base layer;
an anode including an anode current collector, an anode active material base layer formed on the anode current collector and an anode active material coating layer formed on a surface of the anode active material base layer; and
a separation layer interposed between the cathode and the anode,
wherein at least one of the cathode active material coating layer and the anode active material coating layer has a thickness of 20 μm or less,
each thickness of the cathode active material base layer and the anode active material base layer is in a range from 100 μm to 200 μm,
wherein the anode active material base layer includes artificial graphite, and the anode active material coating layer includes natural graphite, and
wherein the anode active material coating layer further includes hard carbon.