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    POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS SECONDARY BATTERY, AND METHOD FOR MANUFACTURING SAME
    1.
    发明申请
    POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS SECONDARY BATTERY, AND METHOD FOR MANUFACTURING SAME 审中-公开

    公开(公告)号：US20200266441A1

    公开(公告)日：2020-08-20

    申请号：US16795539

    申请日：2020-02-19

    Applicant: NICHIA CORPORATION

    Inventor： Kumi YOSHIHARA ,  Kosuke SHIMOKITA ,  Kiyoto IKEBATA ,  Takashi SUGIMOTO

    IPC: H01M4/525 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/505

    Abstract: Provided is a positive-electrode active material for a nonaqueous electrolyte secondary battery, including a lithium transition metal composite oxide particle having a layered structure and containing nickel, and an oxide containing lithium and aluminum and an oxide containing lithium and boron adhering to a surface of the lithium transition metal composite oxide particle. The lithium transition metal composite oxide particle includes a secondary particle formed by aggregation of primary particles containing a solid solution of aluminum in a surface layer. The lithium transition metal composite oxide particles have a composition with a difference of more than 0.22 mol % and less than 0.6 mol % between a ratio of the number of moles of aluminum in the solid solution in the surface layer of the primary particles relative to a total number of moles of metal other than lithium and a ratio of the number of moles of aluminum present in a region other than the surface layer of the primary particles relative to the total number of moles of metal other than lithium.

    POSITIVE ELECTRODE ACTIVE MATERIAL AND POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    3.
    发明公开
    POSITIVE ELECTRODE ACTIVE MATERIAL AND POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 审中-公开

    公开(公告)号：US20230327079A1

    公开(公告)日：2023-10-12

    申请号：US18043014

    申请日：2021-08-24

    Applicant: NICHIA CORPORATION

    Inventor： Kento ISAI ,  Kenichi KOBAYASHI ,  Kiyoto IKEBATA ,  Koichi SUMIWAKA ,  Hayato ISHIBASHI

    IPC: H01M4/36 ,  H01M4/525 ,  H01M4/485 ,  H01M4/505

    CPC classification number: H01M4/364 ,  H01M4/525 ,  H01M2004/028 ,  H01M4/505 ,  H01M4/485

    Abstract: Provided is a positive electrode active material which inhibits a decrease in discharge capacity while improving output in a low SOC region. The positive electrode active material includes: first particles that each consist of a first lithium transition metal composite oxide, the first lithium transition metal composite oxide having a layered structure and having a ratio of a number of moles of nickel to a total number of moles of metals other than lithium in a composition thereof being 0.7 or greater and smaller than 1; second particles that have a volume average particle diameter smaller than a volume average particle diameter of the first particles, the second particles each consisting of a second lithium transition metal composite oxide having a layered structure; and third particles that each consist of a third lithium transition metal composite oxide, the third lithium transition metal composite oxide having a layered structure, having a ratio of number of moles of nickel to total number of moles of metals other than lithium in a composition thereof being 0.4 to 0.6, and having a ratio of a number of moles of cobalt to the total number of moles being 0.35 to 0.55. The first particle content is 60 mass % or higher and lower than 100 mass %, and the third particle content is 10 mass % or lower, to a total content of the first particles, the second particles, and the third particles.

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