US 12,034,147 B2
Negative electrode for lithium secondary battery, method for manufacturing same, and lithium secondary battery comprising same
Yong Chan Kim, Daejeon (KR); Ki Hwan Kim, Daejeon (KR); Jeong Woo Shon, Daejeon (KR); and Pilsung Jo, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 16/649,391
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Sep. 19, 2018, PCT No. PCT/KR2018/011050
§ 371(c)(1), (2) Date Mar. 20, 2020,
PCT Pub. No. WO2019/059637, PCT Pub. Date Mar. 28, 2019.
Claims priority of application No. 10-2017-0122655 (KR), filed on Sep. 22, 2017.
Prior Publication US 2020/0303728 A1, Sep. 24, 2020
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/133 (2010.01); H01M 4/1391 (2010.01); H01M 4/1393 (2010.01); H01M 4/48 (2010.01); H01M 4/587 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/364 (2013.01) [H01M 4/0404 (2013.01); H01M 4/0426 (2013.01); H01M 4/0471 (2013.01); H01M 4/131 (2013.01); H01M 4/133 (2013.01); H01M 4/1391 (2013.01); H01M 4/1393 (2013.01); H01M 4/483 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A negative electrode for a lithium secondary battery comprising:
a negative electrode current collector; and
a negative electrode active material layer formed on the negative electrode current collector; and
a lithium thin film layer on the negative electrode active material layer having a thickness of 1 μm to 3 μm,
wherein the negative electrode active material layer comprises graphite and silicon oxide, and
lithium is incorporated in the negative electrode active material layer in an amount of 7.7×10−6 mol/cm2 to 2.31×10−5 mol/cm2,
wherein the lithium is incorporated in the silicon oxide, and is represented by LixSiyO, wherein 0<y/x≤4.4,
wherein the lithium incorporated in the graphite is represented by LixC6, wherein 0<x≤1, and
wherein the graphite having lithium incorporated therein and the silicon oxide having lithium incorporated therein are present in a weight ratio of 6:4 to 8:2.