CPC H01M 4/587 (2013.01) [H01M 4/0471 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] | 8 Claims |
1. An anode active material for a lithium secondary battery, comprising:
a carbon-based particle comprising pores formed in at least one of an inside of the particle and a surface of the particle, wherein a pore size of the carbon-based particle is 20 nm or less;
a silicon-based compound comprising silicon formed at an inside of the pores of the carbon-based particle or on the surface of the carbon-based particle, wherein the silicon-based compound further comprises at least one of silicon oxide (SiOx, 0<x<2) and silicon carbide (SiC),
wherein a peak intensity ratio in a Raman spectrum of silicon defined by Equation 2 is 1.2 or less:
Peak intensity ratio of Raman spectrum=I(515)/I(480) [Equation 2]
wherein, in Equation 2, I(515) is a peak intensity of silicon in a region having a wavenumber of 515 cm−1 in the Raman spectrum, and I(480) is a peak intensity of silicon in a region having a wavenumber of 480 cm−1 in the Raman spectrum.
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