US 11,929,491 B2
Anode for lithium secondary battery and lithium secondary battery including the same
Hwan Ho Jang, Daejeon (KR); Moon Sung Kim, Daejeon (KR); Hyo Mi Kim, Daejeon (KR); Sang Baek Ryu, Daejeon (KR); Da Hye Park, Daejeon (KR); Seung Hyun Yook, Daejeon (KR); Da Bin Chung, Daejeon (KR); and Jun Hee Han, Daejeon (KR)
Assigned to SK ON CO., LTD., Seoul (KR)
Filed by SK ON CO., LTD., Seoul (KR)
Filed on Jun. 6, 2023, as Appl. No. 18/329,905.
Claims priority of application No. 10-2022-0091594 (KR), filed on Jul. 25, 2022.
Prior Publication US 2024/0030409 A1, Jan. 25, 2024
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/133 (2010.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01)
CPC H01M 4/364 (2013.01) [H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/386 (2013.01); H01M 4/587 (2013.01); H01M 4/622 (2013.01); H01M 2004/027 (2013.01)] 17 Claims
 
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.