US 12,113,220 B2
Multi-layer negative electrode comprising natural graphite and artificial graphite and lithium secondary battery comprising the same
Taek Soo Lee, Daejeon (KR); Chang Wan Koo, Daejeon (KR); Sang Hoon Choi, Daejeon (KR); Jung Min Yang, Cheongju-si (KR); and Il Jae Moon, Incheon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed by LG ENERGY SOLUTION, LTD., Seoul (KR)
Filed on Jun. 27, 2022, as Appl. No. 17/850,570.
Application 17/850,570 is a continuation of application No. 16/063,837, previously published as PCT/KR2017/010697, filed on Sep. 27, 2017.
Claims priority of application No. 10-2016-0125261 (KR), filed on Sep. 29, 2016; and application No. 10-2017-0124177 (KR), filed on Sep. 26, 2017.
Prior Publication US 2022/0328833 A1, Oct. 13, 2022
Int. Cl. H01M 4/587 (2010.01); H01M 4/02 (2006.01); H01M 4/133 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/587 (2013.01) [H01M 4/133 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/621 (2013.01); H01M 4/624 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)] 18 Claims
 
1. A multilayer negative electrode comprising:
a negative electrode current collector configured to transfer electrons between an outer lead and a negative electrode active material;
a first negative electrode mixture layer formed on one surface or both surfaces of the current collector and comprising natural graphite and artificial graphite as a negative electrode active material; and
a second negative electrode mixture layer formed on the first negative electrode mixture layer and comprising a negative electrode active material consisting of artificial graphite,
wherein an amount of the natural graphite present in the first negative electrode mixture layer is from 15% by weight to 75% by weight based on a total weight of the first negative electrode mixture layer,
wherein a weight ratio of the first negative electrode mixture layer to the second negative electrode mixture layer is 1:9 to 5:5, and
wherein an amount of the artificial graphite is greater than an amount of the natural graphite based on a total amount of the first negative electrode mixture layer and second negative electrode mixture layer.