US 11,658,299 B2
Lithium secondary battery
Won Kyung Shin, Daejeon (KR); Kyoung Ho Ahn, Daejeon (KR); Chul Haeng Lee, Daejeon (KR); Jeong Woo Oh, Daejeon (KR); and Min Jung Kim, Daejeon (KR)
Assigned to LG Energy Solution, Ltd.
Appl. No. 16/956,263
Filed by LG Chem, Ltd., Seoul (KR)
PCT Filed May 10, 2019, PCT No. PCT/KR2019/005632
§ 371(c)(1), (2) Date Jun. 19, 2020,
PCT Pub. No. WO2019/216695, PCT Pub. Date Nov. 14, 2019.
Claims priority of application No. 10-2018-0054549 (KR), filed on May 11, 2018.
Prior Publication US 2020/0321615 A1, Oct. 8, 2020
Int. Cl. H01M 4/525 (2010.01); H01M 4/485 (2010.01); H01M 4/505 (2010.01); H01M 10/0525 (2010.01); H01M 10/0567 (2010.01); H01M 10/0568 (2010.01); H01M 10/0569 (2010.01); H01M 4/36 (2006.01); H01M 4/587 (2010.01); H01M 4/38 (2006.01); H01M 4/48 (2010.01); H01M 4/58 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [H01M 4/364 (2013.01); H01M 4/386 (2013.01); H01M 4/483 (2013.01); H01M 4/485 (2013.01); H01M 4/505 (2013.01); H01M 4/58 (2013.01); H01M 4/587 (2013.01); H01M 10/0525 (2013.01); H01M 10/0567 (2013.01); H01M 10/0568 (2013.01); H01M 10/0569 (2013.01); H01M 2004/027 (2013.01); H01M 2004/028 (2013.01); H01M 2300/0028 (2013.01)] 6 Claims
 
1. A lithium secondary battery comprising:
a positive electrode having a positive electrode active material represented by the following Formula 1;
a negative electrode having a silicon-based negative electrode active material and a carbon-based negative electrode active material, wherein the silicon-based negative electrode active material and the carbon-based negative electrode active material are present in a weight ratio between 1:99 and 50:50;
a separator; and
a non-aqueous electrolyte solution,
wherein the non-aqueous electrolyte solution having a non-aqueous organic solvent and a lithium salt,
wherein the lithium salt is present in a concentration of 2.5 M to 5 M in the non-aqueous electrode solution, and
wherein the lithium salt comprising LiPF6, and a lithium bis(fluorosulfonyl)imide, wherein LiPF6 and the lithium bis(fluorosulfonyl)imide are present in a weight ratio between 1:9 and 5:5;
Li1+x[NiaCobMncMd]O2  [Formula 1]
wherein, 0<x<1, 0.8<a<1, 0<b<0.2, 0<c<0.2, 0<d<0.2, and M is at least one element selected from the group consisting of W, Cu, Fe, V, Cr, Ti, Zr, Zn, Al, Ta, Y, In, La, Sr, Ga, Sc, Gd, Sm, Ca, Ce, Nb, Mg, B, and Mo.