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    METHOD OF PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    1.
    发明申请
    METHOD OF PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 有权

    公开(公告)号：US20220112095A1

    公开(公告)日：2022-04-14

    申请号：US17561116

    申请日：2021-12-23

    Applicant: Nichia Corporation

    Inventor： Kenichi KOBAYASHI

    IPC: C01G53/00 ,  H01M10/0525

    Abstract: A method of producing a positive electrode active material for a nonaqueous electrolyte secondary battery, the method includes preparing nickel-containing composite oxide particles having a ratio 1D90/1D10 of a 90% particle size 1D90 to a 10% particle size 1D10 in volume-based cumulative particle size distribution of 3 or less; obtaining a raw material mixture containing the composite oxide particles and a lithium compound and having a ratio of a total number of moles of lithium to a total number of moles of metal elements contained in the composite oxide in a range of 1 to 1.3; subjecting the raw material mixture to a heat treatment to obtain a heat-treated material; subjecting the heat-treated material to a dry-dispersion treatment to obtain a first dispersion; and bringing the first dispersion into contact with a liquid medium to obtain a second dispersion.

    POSITIVE ELECTRODE ACTIVE MATERIAL AND POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    4.
    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.

    POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD FOR PRODUCING SAME
    5.
    发明申请
    POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND METHOD FOR PRODUCING SAME 有权

    公开(公告)号：US20230085645A1

    公开(公告)日：2023-03-23

    申请号：US17759422

    申请日：2021-01-26

    Applicant: NICHIA CORPORATION

    Inventor： Masato SONOO ,  Hideaki HAMADA ,  Kenichi KOBAYASHI ,  Jota MORIMOTO

    IPC: H01M4/04 ,  H01M4/485 ,  H01M4/525

    Abstract: Provided is a positive electrode active material for a non-aqueous electrolyte secondary battery. Also provided is a method for producing a positive electrode active material for a non-aqueous electrolyte secondary battery, comprising: providing a lithium transition metal composite oxide having a ratio D50/DSEM of 1 or more and 4 or less, 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 of 0.3 or more and less than 1, and a ratio of a number of moles of cobalt to the total number of moles of metals other than lithium of 0 or more and less than 0.5; bringing the lithium transition metal composite oxide into contact with a cobalt compound to obtain an adhered material; and heat-treating the adhered material at a temperature higher than 700° C. and lower than 1100° C.

    POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
    8.
    发明申请
    POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY 有权
    用于非电解电解质二次电池的正极电极活性材料

    公开(公告)号：US20160285092A1

    公开(公告)日：2016-09-29

    申请号：US15075937

    申请日：2016-03-21

    Applicant: NICHIA CORPORATION

    Inventor： Tomooki KAWASAKI ,  Kenichi KOBAYASHI

    IPC: H01M4/505 ,  H01M4/525 ,  H01M10/052

    CPC classification number: H01M4/505 ,  C01G53/54 ,  C01P2002/52 ,  C01P2006/40 ,  H01B1/08 ,  H01M4/525 ,  H01M10/052

    Abstract: The present disclosure provides a positive electrode active material for nonaqueous electrolyte secondary batteries including: a lithium transition metal composite oxide represented by general formula: Lia(Ni1-xCrx)a(Mn1-yTiy)2-α-β-γ-δMgβAlγMδO4 in which 1.00≦a≦1.30, 0.020≦x≦0.200, 0.006≦y≦0.070, 0.450≦α≦0.550, 0≦β≦0.015, 0≦γ≦0.035, and 0≦δ≦0.010, and M represents at least one element selected from the group consisting of Na, K, Ca, Sr, Ba, Ga, Co, Zn, Si, Ge, Zr, Hf, Sn, Ta, Nb, P, Bi, Mo, and W.

    Abstract translation: 本发明提供一种非水电解质二次电池用正极活性物质，其特征在于，具有以下通式：LiI（Ni1-xCrx）a（Mn1-yTiy）2-α-β-γ-δMgβAlγMδO4表示的锂过渡金属复合氧化物，其中 1.00≤a≤1.30,0.020≤x≤0.200,0.006≤y≤0.070,0.450≤α≤0.550,0≤β≤0.015,0≤γ≤0.035,0≤δ≤0.010，M表示至少一种元素 选自Na，K，Ca，Sr，Ba，Ga，Co，Zn，Si，Ge，Zr，Hf，Sn，Ta，Nb，P，Bi，Mo和W.

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