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    Cathode Active Material of Lithium Secondary Battery
    7.
    发明申请
    Cathode Active Material of Lithium Secondary Battery 审中-公开

    公开(公告)号：US20190157660A1

    公开(公告)日：2019-05-23

    申请号：US16198457

    申请日：2018-11-21

    Applicant: ECOPRO BM CO., LTD.

    Inventor： Sung Jin Jang ,  Moon Ho Choi ,  Jun Won Suh ,  Jung Han Lee ,  Ji Hyun Nam ,  Seung Woo Choi

    IPC: H01M4/1315

    Abstract: The present invention relates to a cathode active material for a lithium secondary battery, and more particularly, to a cathode active material for a lithium secondary battery, which includes a core portion and a shell portion surrounding the core portion, in which a total content of cobalt in the core portion and the shell portion is 5 to 12 mol %, and the content of cobalt in the core portion and the shell portion is adjusted to be within a predetermined range. In the cathode active material precursor and the cathode active material for a secondary battery prepared using the same according to the present invention, optimal capacity of a lithium secondary battery may be increased by adjusting the cobalt content in the particles of the cathode active material, and life characteristics may be enhanced by improving stability.

    Lithium complex oxide
    9.
    发明授权
    Lithium complex oxide 有权

    公开(公告)号：US11621418B2

    公开(公告)日：2023-04-04

    申请号：US17085519

    申请日：2020-10-30

    Applicant: ECOPRO BM CO., LTD.

    Inventor： Jung Han Lee ,  Seung Woo Choi ,  Moon Ho Choi ,  Jun Won Suh ,  Jin Kyeong Yun ,  Mi Hye Yun ,  Kwang Seok Choi ,  Joong Ho Bae ,  Jin Oh Son

    IPC: H01B1/08 ,  H01M4/525 ,  C01G53/00 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/02

    Abstract: A lithium complex oxide includes a mixture of first particles of n1 (n1>40) aggregated primary particles and second particles of n2 (n2≤20) aggregated primary particles, the lithium complex oxide represented by Chemical Formula 1 and having FWHM (deg., 2θ) of 104 peak in XRD, defined by a hexagonal lattice having R-3m space group, in a range of Formula 1: LiaNixCoyMnzM1-x-y-zO2,  [Chemical Formula 1] where M is selected from: B, Ba, Ce, Cr, F, Mg, Al, Cr, V, Ti, Fe, Zr, Zn, Si, Y, Nb, Ga, Sn, Mo, W, P, Sr, and any combination thereof, 0.9≤a≤1.3, 0.6≤x≤1.0, 0.0≤y≤=0.4, 0.0≤z≤0.4, and 0.0≤1−x−y−z≤0.4, −0.025≤FWHM(104)−{0.04+(xfirst particle−0.6)×0.25}≤0.025,  [Formula 1] where FWHM(104) is represented by Formula 2, FWHM(104)={(FWHMChemical Formula 1 powder(104)−0.1×mass ratio of second particles)/mass ratio of first particles}−FWHMSi powder(220).  [Formula 2]

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