US 12,107,262 B2
Positive electrode for secondary battery comprising flake graphite and secondary battery comprising the same
Byounghyo Jung, Daejeon (KR); Ilhong Kim, Daejeon (KR); Minchul Jang, Daejeon (KR); and Insung Uhm, Daejeon (KR)
Assigned to LG Energy Solution, Ltd., Seoul (KR)
Appl. No. 17/433,124
Filed by LG Energy Solution, Ltd., Seoul (KR)
PCT Filed Nov. 25, 2020, PCT No. PCT/KR2020/016763
§ 371(c)(1), (2) Date Aug. 23, 2021,
PCT Pub. No. WO2021/107586, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 10-2019-0157647 (KR), filed on Nov. 29, 2019.
Prior Publication US 2022/0149350 A1, May 12, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/364 (2013.01) [H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01); H01M 2220/20 (2013.01); H01M 2220/30 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A positive electrode for secondary battery comprising:
a first positive electrode mixture layer formed on at least one surface of a positive electrode current collector and including a first positive electrode active material; and
a second positive electrode mixture layer formed on the first positive electrode mixture layer and including a second positive electrode active material,
wherein the first positive electrode active material and the second positive electrode active material include a lithium nickel-based transition metal oxide represented by the following Chemical Formula 1, and
wherein only the first positive electrode mixture layer contains a flake graphite as an additive, and the second positive electrode mixture layer does not contain a flake graphite:
LiaNi1-bMbO2-xAx  (1)
in the above formula,
M is at least one selected from the group consisting of Ti, Mg, Al, Zr, Mn and Co,
A is an oxygen-substituted halogen,
1.00≤a≤1.05, 0<b≤0.2, and 0≤x≤0.01.