公开(公告)号：US20230223526A1

公开(公告)日：2023-07-13

申请号：US18151079

申请日：2023-01-06

Applicant: LG Energy Solution Ltd.

Inventor： Jong Wook Heo ,  Wang Mo Jung ,  Chi Ho JO ,  Jin Tae Hwang ,  Hae Jung Jung ,  Byung Joon Chae ,  Tae Gu Yoo ,  Suk Bae Yoon ,  Hyeon Jin Cho

IPC: H01M4/485 ,  H01M4/525 ,  H01M4/505 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/485 ,  H01M4/525 ,  H01M4/505 ,  H01M4/0404 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive electrode material powder including a lithium nickel-based oxide represented by Chemical Formula 1 (LiaNibCocM1dM2eO2) and having a degree of single-particle formation, represented by the following Equation (1), of 0.3 to 0.8:







∑

i
=
1

n




4
⁢
π

3

⁢

R
i
3



n

×


1

D
50


.





In Equation (1), Ri is a radius of the ith grain as measured by subjecting an electrode manufactured using the positive electrode material powder to ion milling and then analyzing the cross section of the electrode by electron backscatter diffraction (EBSD), n is the total number of grains as measured by the EBSD analysis and ranges from 350 to 450, and D50 is a volume-cumulative average particle diameter of the positive electrode material powder as measured using a laser diffraction particle size analyzer.