Patent ID: 11929491
Assignee: SK ON CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An anode for a lithium secondary battery, comprising:
an anode current collector; and
an anode active material layer formed on at least one surface of the anode current collector, the anode active material layer comprising a carbon-based active material, a first silicon-based active material doped with magnesium, and a second silicon-based active material not doped with magnesium,
wherein a content of the first silicon-based active material is in a range from 2 wt % to 20 wt % based on a total weight of the anode active material layer,
wherein a Mg1s spectrum of a surface of the first silicon-based active material measured by an X-ray photoelectron spectroscopy satisfies Formula 1:

PMg/(PMg+PMgO)≤0.6  [Formula 1]

wherein, in Formula 1, PMg is an area of a 1303 eV peak of the Mg1s spectrum, and PMgO is an area of a 1304.5 eV peak of the Mg1s spectrum.