US 11,929,490 B2
Anode including graphite and silicon-based material having different diameters and lithium secondary battery including the same
Junghyun Choi, Daejeon (KR); Hyeon Min Song, Daejeon (KR); Joo Hwan Sung, Daejeon (KR); Han Sol Park, Daejeon (KR); Minsu Cho, Daejeon (KR); Sunghae Park, Daejeon (KR); Jingoo Kwak, Daejeon (KR); Younguk Park, Daejeon (KR); Sue Jin Kim, Daejeon (KR); and Jinsu Jang, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 17/048,416
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
PCT Filed Jun. 26, 2019, PCT No. PCT/KR2019/007739
§ 371(c)(1), (2) Date Oct. 16, 2020,
PCT Pub. No. WO2020/085609, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 10-2018-0127487 (KP), filed on Oct. 24, 2018; and application No. 10-2019-0072306 (KP), filed on Jun. 18, 2019.
Prior Publication US 2021/0159488 A1, May 27, 2021
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 4/48 (2010.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/364 (2013.01) [H01M 4/133 (2013.01); H01M 4/134 (2013.01); H01M 4/386 (2013.01); H01M 4/483 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 10 Claims
 
1. An anode for a lithium secondary battery, wherein an anode material layer is disposed on at least one surface of an anode current collector, and the anode material layer comprises large-particle graphite, a small-particle silicon-based material, and fine-particle graphite, and satisfies the following conditions 1 to 3:
condition 1: a diameter D50 of the large-particle graphite (D1) is 1 to 50 μm;
condition 2: a diameter D50 of the small-particle silicon-based material (D2) is 0.155D1 to 0.414D1; and
condition 3: a diameter D50 of the fine-particle graphite (D3) is 0.155D1 to 0.414D1, or 0.155D2 to 0.414D2.