US 11,688,854 B2
Anode active material for lithium secondary battery, method of forming the same and lithium secondary battery including the same
Gwi Ok Park, Daejeon (KR); Seok Keun Yoo, Daejeon (KR); and Ju Ho Chung, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK ON CO., LTD., Seoul (KR)
Filed on Mar. 11, 2022, as Appl. No. 17/692,881.
Claims priority of application No. 10-2021-0032101 (KR), filed on Mar. 11, 2021; and application No. 10-2021-0093031 (KR), filed on Jul. 15, 2021.
Prior Publication US 2022/0293944 A1, Sep. 15, 2022
Int. Cl. H01M 4/587 (2010.01); H01M 4/04 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
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
OG exemplary drawing
 
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.