US 11,791,457 B2
Anode active material for lithium secondary battery, method of preparing the same, and lithium secondary battery containing the same
Jee Hee Lee, Daejeon (KR); Joon Sup Kim, Daejeon (KR); Nam Hyung Kim, Ulsan (KR); Yeong Uk Son, Ulsan (KR); Yoon Kwang Lee, Ulsan (KR); and Jae Phil Cho, Ulsan (KR)
Assigned to SK ON CO., LTD, Seoul (KR); and UNIST (ULSAN NATIONAL INSTITUTE OF SCIENCE AND TECHNOLOGY), Ulsan (KR)
Filed by SK ON CO., LTD., Seoul (KR)
Filed on Jan. 26, 2021, as Appl. No. 17/158,503.
Application 17/158,503 is a continuation of application No. 16/212,255, filed on Dec. 6, 2018, granted, now 10,923,715.
Claims priority of application No. 10-2017-0167486 (KR), filed on Dec. 7, 2017.
Prior Publication US 2021/0151747 A1, May 20, 2021
Int. Cl. H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 4/58 (2010.01); H01M 4/13 (2010.01); H01M 4/04 (2006.01); H01M 10/0525 (2010.01); H01M 4/587 (2010.01); H01M 4/1395 (2010.01); H01M 4/134 (2010.01); H01M 4/1393 (2010.01); H01M 4/133 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/366 (2013.01) [H01M 4/0428 (2013.01); H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/1393 (2013.01); H01M 4/1395 (2013.01); H01M 4/386 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An anode active material for a lithium secondary battery, the anode active material comprising:
a carbon/silicon composite comprising:
a carbon based particle;
a first carbon coating layer positioned on and in contact with the carbon based particle the first carbon coating layer including pores;
a silicon coating layer positioned on and in contact with the first carbon coating layer; and
wherein the anode active material further comprises a second carbon coating layer positioned on the carbon/silicon composite, and
wherein the first carbon coating layer is formed from a carbon precursor which is different from the carbon based particle.