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1.发明申请公开(公告)号：US20190103605A1
公开(公告)日：2019-04-04
申请号：US16086745
申请日：2017-02-13
Inventor： Motoharu Saitou , Yoshinori Aoki , Takeshi Ogasawara
Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery contains silicon and lithium nickel complex oxide having a layered rock-salt structure and is composed of secondary particles formed of aggregated primary particles. Lithium nickel complex oxide contains 80 mol % or more of nickel, based on the total amount of metal excluding lithium, silicon content is 0.6 mass % or less based on the total amount of the positive electrode active material, and a porosity of the positive electrode active material is 0% or more and 1% or less.
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公开(公告)号：US11121363B2
公开(公告)日：2021-09-14
申请号：US16326560
申请日：2017-08-22
Inventor： Yoshinori Aoki , Motoharu Saitou , Takeshi Ogasawara
IPC: H01M4/36 , H01M4/525 , H01M4/58 , H01M10/0525 , H01M4/02
Abstract: The present invention is directed to a positive electrode active material for non-aqueous electrolyte secondary batteries that can reduce direct-current resistance while it contains a nickel-containing lithium transition metal oxide with a high Ni content. The positive electrode active material contains lithium borate and a nickel-containing lithium transition metal oxide (Ni≥80 mol %) having a layered structure. The nickel-containing lithium transition metal oxide is composed of secondary particles formed by aggregation of primary particles. Lithium borate is attached to the surfaces of the primary particles. The proportion b of lithium borate with respect to the total molar amount of metal elements other than lithium in the nickel-containing lithium transition metal oxide is in the range of 0 mol %
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公开(公告)号：US20190190018A1
公开(公告)日：2019-06-20
申请号：US16326560
申请日：2017-08-22
Inventor： Yoshinori Aoki , Motoharu Saitou , Takeshi Ogasawara
IPC: H01M4/36 , H01M4/525 , H01M4/58 , H01M10/0525
CPC classification number: H01M4/366 , H01M4/36 , H01M4/525 , H01M4/5825 , H01M10/0525 , H01M2004/021 , H01M2004/028
Abstract: The present invention is directed to a positive electrode active material for non-aqueous electrolyte secondary batteries that can reduce direct-current resistance while it contains a nickel-containing lithium transition metal oxide with a high Ni content. The positive electrode active material contains lithium borate and a nickel-containing lithium transition metal oxide (Ni≥80 mol %) having a layered structure. The nickel-containing lithium transition metal oxide is composed of secondary particles formed by aggregation of primary particles. Lithium borate is attached to the surfaces of the primary particles. The proportion b of lithium borate with respect to the total molar amount of metal elements other than lithium in the nickel-containing lithium transition metal oxide is in the range of 0 mol %
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公开(公告)号：US20210135211A1
公开(公告)日：2021-05-06
申请号：US16638837
申请日：2018-07-13
Inventor： Motoharu Saitou , Takeshi Ogasawara
Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries which allows the capacity of nonaqueous electrolyte secondary batteries to be increased and offers a smaller decrease in charge discharge cycle characteristics, and to provide a nonaqueous electrolyte secondary battery having such a positive electrode active material. A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention includes a composite oxide containing Li, Ni, Co, Al, W and additive elements M, the proportion of Ni in the composite oxide being not less than 80 mol % relative to the total number of moles of the metal elements except Li, the additive elements M including at least either of an alkaline earth metal element and an alkali metal element except Li, and a tetravalent or higher valent element, the average valence of the additive elements M being not less than 3.6.
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Patent Agency Ranking
公开(公告)号：US20210075013A1
公开(公告)日：2021-03-11
申请号：US17040153
申请日：2019-02-20
Inventor： Motoharu Saitou , Takeshi Ogasawara , Yoshinori Aoki , Tomoki Tsuji
Abstract: A non-aqueous electrolyte secondary battery according to one embodiment includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode has lithium composite oxide particles containing 80 mol % or more but less than 100 mol % of Ni with respect to the total number of moles of metal elements excluding Li. The lithium composite oxide particles include particles (32) having a stair-like structure in which three or more layers of a flat surface (30) having a periphery length of 1 μm or more are layered.
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公开(公告)号：US12255325B2
公开(公告)日：2025-03-18
申请号：US16638837
申请日：2018-07-13
Inventor： Motoharu Saitou , Takeshi Ogasawara
Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries which allows the capacity of nonaqueous electrolyte secondary batteries to be increased and offers a smaller decrease in charge discharge cycle characteristics, and to provide a nonaqueous electrolyte secondary battery having such a positive electrode active material. A positive electrode active material for nonaqueous electrolyte secondary batteries according to the present invention includes a composite oxide containing Li, Ni, Co, Al, W and additive elements M, the proportion of Ni in the composite oxide being not less than 80 mol % relative to the total number of moles of the metal elements except Li, the additive elements M including at least either of an alkaline earth metal element and an alkali metal element except Li, and a tetravalent or higher valent element, the average valence of the additive elements M being not less than 3.6.
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公开(公告)号：US11005099B2
公开(公告)日：2021-05-11
申请号：US16086091
申请日：2017-02-07
Inventor： Motoharu Saitou , Yoshinori Aoki , Takeshi Ogasawara
IPC: H01M4/525 , C01G53/00 , H01M10/0525 , H01M4/02
Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material, a negative electrode, and a nonaqueous electrolyte. The positive electrode active material includes lithium nickel complex oxide, and the lithium nickel oxide has a layered rock-salt structure and is represented by a composition formula of LixNiyMzO2 (where M is at least one metal element selected from the group consisting of Co, Al, Mg, Ca, Cr, Zr, Mo, Si, Ti, and Fe, and x, y, and z satisfy 0.95≤x≤1.05, 0.8≤y≤1, 0≤z≤0.2, and y+z=1). A half width n of a (104) diffraction peak in an X-ray diffraction pattern is 0.13° or less, and the content of the positive electrode active material with a particle size of 3.41 μm or less is 2 volume % or less based on a total amount of the positive electrode active material contained in the positive electrode.
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公开(公告)号：US10916768B2
公开(公告)日：2021-02-09
申请号：US16086745
申请日：2017-02-13
Inventor： Motoharu Saitou , Yoshinori Aoki , Takeshi Ogasawara
Abstract: A positive electrode active material for a nonaqueous electrolyte secondary battery contains silicon and lithium nickel complex oxide having a layered rock-salt structure and is composed of secondary particles formed of aggregated primary particles. Lithium nickel complex oxide contains 80 mol % or more of nickel, based on the total amount of metal excluding lithium, silicon content is 0.6 mass % or less based on the total amount of the positive electrode active material, and a porosity of the positive electrode active material is 0% or more and 1% or less.
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公开(公告)号：US20200295365A1
公开(公告)日：2020-09-17
申请号：US16086091
申请日：2017-02-07
Inventor： Motoharu Saitou , Yoshinori Aoki , Takeshi Ogasawara
IPC: H01M4/525 , H01M10/0525 , C01G53/00
Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode containing a positive electrode active material, a negative electrode, and a nonaqueous electrolyte. The positive electrode active material includes lithium nickel complex oxide, and the lithium nickel oxide has a layered rock-salt structure and is represented by a composition formula of LixNiyMzO2 (where M is at least one metal element selected from the group consisting of Co, Al, Mg, Ca, Cr, Zr, Mo, Si, Ti, and Fe, and x, y, and z satisfy 0.95≤x≤1.05, 0.8≤y≤1, 0≤z≤0.2, and y+z=1). A half width n of a (104) diffraction peak in an X-ray diffraction pattern is 0.13° or less, and the content of the positive electrode active material with a particle size of 3.41 μm or less is 2 volume % or less based on a total amount of the positive electrode active material contained in the positive electrode.
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