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公开(公告)号：US20220384805A1
公开(公告)日：2022-12-01
申请号：US17762528
申请日：2020-07-28
Inventor： Yoshinori Aoki , Masakazu Togo , Takeshi Ogasawara
IPC: H01M4/525 , H01M4/36 , H01M4/505 , H01M10/052 , C01G53/00
Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery, according to an example of this embodiment, includes a lithium transition metal composite oxide which has a layered structure and contains at least Ni, Al, and Ca. The lithium transition metal composite oxide has a Ni content of 85-95 mol %, an Al content of at most 8 mol %, and a Ca content of at most 2 mol % with respect to the total amount of metal elements other than Li. In addition, the proportion of metal elements other than Li present in a Li layer is 0.6-2.0 mol % with respect to the total amount of metal elements other than Li contained in the composite oxide.
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22.发明申请公开(公告)号：US20220209229A1
公开(公告)日：2022-06-30
申请号：US17601641
申请日：2020-02-05
Inventor： Manabu Takijiri , Takeshi Ogasawara , Motoharu Saito , Yoshinori Aoki
IPC: H01M4/525 , H01M10/0525
Abstract: This positive electrode for a nonaqueous electrolyte secondary battery is provided with: a positive electrode active material including lithium composite oxide particles containing not less than 80 mol % but less than 100 mol % of Ni with respect to the total number of moles of metal elements other than Li; and a conductive material, wherein the lithium composite oxide particles include particles each having a step-like structure with three or more stacked flat surfaces having an outer edge length of 1 μm or more, and the average particle size of the conductive material is 30 nm or less.
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公开(公告)号：US20210226211A1
公开(公告)日：2021-07-22
申请号：US17269740
申请日：2019-02-27
Inventor： Yoshinori Aoki , Toshinobu Kanai , Takeshi Ogasawara
Abstract: A positive electrode active material for non-aqueous electrolyte secondary batteries comprises a Co-containing lithium transition metal oxide containing Ni, Mn, and an arbitrary element and having a layered structure, wherein the content ratio of Ni in the lithium transition metal oxide is 75 to 95 mol %, the content ratio of Mn in the lithium transition metal oxide is equal to or greater than the content ratio of Co in the lithium transition metal oxide, the content ratio of Co in the lithium transition metal oxide is 0 to 2 mol %, the content ratio of a metal element other than Li in an Li layer in the layered structure is 1 to 2.5 mol %, and, in the lithium transition metal oxide, the half width n of a diffraction peak for (208) plane of an X-ray diffraction pattern as measured by X-ray diffraction is as follows: 0.30°23 n≤0.50°.
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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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Patent Agency Ranking
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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公开(公告)号：US20250038198A1
公开(公告)日：2025-01-30
申请号：US18909198
申请日：2024-10-08
Inventor： Yoshinori Aoki , Takeshi Ogasawara
IPC: H01M4/525 , A63B69/00 , A63B102/26 , H01M4/02
Abstract: The positive electrode active material for a non-aqueous electrolyte secondary cell according to an embodiment of the present disclosure is characterized in having a Ni-containing lithium transition metal oxide having a layered structure; the proportion of Ni in the lithium transition metal oxide being 91 to 96 mol % relative to the total number of moles of metal elements excluding Li; a transition metal being present in the Li layer of the layered structure at an amount of 1 to 2.5 mol % relative to the total number of moles of transition metals in the Ni-containing lithium transition metal oxide; and the Ni-containing lithium transition metal oxide being such that the half width n of the diffraction peak for the (208) plane in an X-ray diffraction pattern obtained by X-ray diffraction is 0.30°≤n≤0.50°.
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公开(公告)号：US12126021B2
公开(公告)日：2024-10-22
申请号：US18114833
申请日：2023-02-27
Inventor： Yoshinori Aoki , Toshinobu Kanai , Takeshi Ogasawara
CPC classification number: H01M4/525 , C01G53/50 , H01M4/505 , C01P2002/52 , C01P2002/74 , C01P2002/77 , C01P2006/40 , H01M2004/021 , H01M2004/028
Abstract: A positive electrode active material for non-aqueous electrolyte secondary batteries comprises a lithium transition metal oxide containing Ni, Mn, Co, and Al and having a layered structure, wherein the content ratio of Ni in the lithium transition metal oxide is 75 to 95 mol %, the content ratio of Mn in the lithium transition metal oxide is equal to or greater than the content ratio of Co in the lithium transition metal oxide, the content ratio of Co in the lithium transition metal oxide is 0.5 to 2 mol %, the content ratio of a metal element other than Li in an Li layer in the layered structure is 1 to 2.5 mol %, and, in the lithium transition metal oxide, the half width n of a diffraction peak for (208) plane of an X-ray diffraction pattern as measured by X-ray diffraction is as follows: 0.30°≤n≤0.50°.
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29.发明公开公开(公告)号：US20240038970A1
公开(公告)日：2024-02-01
申请号：US18266124
申请日：2021-12-01
Inventor： Masakazu Togo , Yoshinori Aoki , Takeshi Ogasawara
IPC: H01M4/36 , H01M4/525 , H01M4/505 , H01M10/052
CPC classification number: H01M4/366 , H01M4/525 , H01M4/505 , H01M10/052 , H01M2004/028
Abstract: A positive electrode active material included in this non-aqueous electrolyte secondary battery positive electrode includes a lithium-transition metal composite oxide. The lithium-transition metal composite oxide contains 80-95 mol % of Ni and 0-20 mol % of Mn, and 3-8 mol % of a metal element other than Li is present in a Li layer of the lithium-transition metal composite oxide. The ratio m/n of the half width m of the diffraction peak for the (003) plane to the half width n of the diffraction peak for the (110) plane in an x-ray diffraction pattern obtained by x-ray diffraction of the positive electrode active material satisfies 0.72≤m/n≤0.85. The lithium-transition metal composite oxide is formed from secondary particles that are aggregates of primary particles, the internal porosity of the secondary particles being 1%-5%.
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30.发明公开公开(公告)号：US20230207801A1
公开(公告)日：2023-06-29
申请号：US18114833
申请日：2023-02-27
Inventor： Yoshinori Aoki , Toshinobu Kanai , Takeshi Ogasawara
CPC classification number: H01M4/525 , C01G53/50 , H01M4/505 , C01P2002/52 , C01P2002/74 , C01P2002/77 , C01P2006/40 , H01M2004/021
Abstract: A positive electrode active material for non-aqueous electrolyte secondary batteries comprises a lithium transition metal oxide containing Ni, Mn, Co, and Al and having a layered structure, wherein the content ratio of Ni in the lithium transition metal oxide is 75 to 95 mol %, the content ratio of Mn in the lithium transition metal oxide is equal to or greater than the content ratio of Co in the lithium transition metal oxide, the content ratio of Co in the lithium transition metal oxide is 0.5 to 2 mol %, the content ratio of a metal element other than Li in an Li layer in the layered structure is 1 to 2.5 mol %, and, in the lithium transition metal oxide, the half width n of a diffraction peak for (208) plane of an X-ray diffraction pattern as measured by X-ray diffraction is as follows: 0.30°≤n≤0.50°.
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