Patent ID: 11967705
Assignee: SK ON CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An anode active material for a lithium secondary battery, comprising:
a carbon-based particle including pores therein;
a silicon-containing coating layer formed at an inside of the pores of the carbon-based particle or on a surface of the carbon-based particle; and
a carbon coating layer formed on the silicon-containing coating layer, and the carbon coating layer comprising a conductive polymer,
wherein the silicon-containing coating layer does not include silicon carbide (SiC),
wherein a full width at half maximum (FWHM) of an O1s peak of a surface of the anode active material measured by an X-ray photoelectron spectroscopy (XPS) is 2.0 or more,
wherein an XPS Si2p peak area ratio defined by Equation 3 is 15.0% or less:

XPS Si2p peak area ratio (%)={p1/(p1+p2+p3)}*100  [Equation 3]

wherein, in Equation 3, p1 is a peak area of a Si—O bond of SiO2 measured on the surface of the anode active material from the XPS, p2 is a peak area of a Si—O bond of SiOx (0<x<2) measured on the surface of the anode active material from the XPS, and p3 is a peak area of a Si—Si bond measured on the surface of the anode active material from the XPS.