US 12,230,786 B2
Anode active material for lithium secondary battery and lithium secondary battery comprising anode including the anode active material
Deokhyun Kim, Yongin-si (KR); Jaehyuk Kim, Yongin-si (KR); Jaemyung Kim, Yongin-si (KR); Soonsung Suh, Yongin-si (KR); Hana Yoo, Yongin-si (KR); Yungu Cho, Yongin-si (KR); and Heeyoung Chu, Yongin-si (KR)
Assigned to Samsung SDI Co., Ltd., Yongin-si (KR)
Filed by SAMSUNG SDI CO., LTD., Yongin-si (KR)
Filed on Jul. 20, 2023, as Appl. No. 18/355,768.
Application 18/355,768 is a continuation of application No. 15/963,873, filed on Apr. 26, 2018, granted, now 11,757,090.
Claims priority of application No. 10-2017-0054506 (KR), filed on Apr. 27, 2017.
Prior Publication US 2024/0021792 A1, Jan. 18, 2024
Int. Cl. H01M 4/36 (2006.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/48 (2010.01); H01M 4/62 (2006.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/364 (2013.01) [H01M 4/134 (2013.01); H01M 4/386 (2013.01); H01M 4/483 (2013.01); H01M 4/625 (2013.01); H01M 2004/027 (2013.01); H01M 10/0525 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An anode active material for a lithium secondary battery, comprising a first composite comprising at least two active silicon materials having different average crystal sizes and a silicon oxide (SiOx) material (wherein 0<x≤2),
wherein the first composite comprises a large-particle diameter active silicon material and a small-particle diameter active silicon material,
wherein the large-particle diameter active silicon material has a crystal size of 24 nm to 40 nm, and the small-particle diameter active silicon material has a crystal size of 8 nm to 12 nm, and
wherein an amount of the small-particle diameter active silicon material is 20 wt % to 80 wt % based on a total weight of the large-particle diameter active silicon material and the small-particle diameter active silicon material.