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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
摘要： 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
IPC分类号： H01M4/525 , H01M10/0525 , C01G53/00
摘要： 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：US12126021B2
公开(公告)日：2024-10-22
申请号：US18114833
申请日：2023-02-27
CPC分类号： H01M4/525 , C01G53/50 , H01M4/505 , C01P2002/52 , C01P2002/74 , C01P2002/77 , C01P2006/40 , H01M2004/021 , H01M2004/028
摘要： 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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24.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
发明人： Masakazu Togo , Yoshinori Aoki , Takeshi Ogasawara
IPC分类号： H01M4/36 , H01M4/525 , H01M4/505 , H01M10/052
CPC分类号： H01M4/366 , H01M4/525 , H01M4/505 , H01M10/052 , H01M2004/028
摘要： 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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25.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
CPC分类号： H01M4/525 , C01G53/50 , H01M4/505 , C01P2002/52 , C01P2002/74 , C01P2002/77 , C01P2006/40 , H01M2004/021
摘要： 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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公开(公告)号：US11626588B2
公开(公告)日：2023-04-11
申请号：US17269740
申请日：2019-02-27
摘要： A positive electrode active material or 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°≤n≤0.50°.
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公开(公告)号：US20230072002A1
公开(公告)日：2023-03-09
申请号：US17792879
申请日：2020-12-01
发明人： Katsuya Inoue , Takeshi Ogasawara , Yoshinori Aoki
摘要： This positive electrode active material for nonaqueous electrolyte secondary batteries contains: a lithium transition metal composite oxide having secondary particles, each of which is formed of aggregated primary particles; and a surface modification layer which is formed on the surface of each primary particle of the lithium transition metal composite oxide. The lithium transition metal composite oxide contains at least Al and 80% by mole or more of Ni relative to the total number of moles of the metal elements excluding Li; and the surface modification layer contains at least Ba, and at least one of Sr and Ca.
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28.发明申请公开(公告)号：US20190190018A1
公开(公告)日：2019-06-20
申请号：US16326560
申请日：2017-08-22
IPC分类号： H01M4/36 , H01M4/525 , H01M4/58 , H01M10/0525
CPC分类号： H01M4/366 , H01M4/36 , H01M4/525 , H01M4/5825 , H01M10/0525 , H01M2004/021 , H01M2004/028
摘要： 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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