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公开(公告)号：US12100832B2
公开(公告)日：2024-09-24
申请号：US17610386
申请日：2020-03-09
CPC分类号： H01M4/364 , H01M4/505 , H01M4/525 , H01M2004/028
摘要： This positive electrode active substance for a non-aqueous electrolyte secondary battery contains: a lithium-containing transition metal oxide having secondary particles formed by aggregation of primary particles; and at least a tungsten compound and a boron compound that are present between primary particles. The present invention is characterized in that: the amount of tungsten element eluted when the positive electrode active substance is washed for 5 minutes with a 0.01 mol/L aqueous solution of sodium hydroxide is 60% or less of the amount of tungsten element detected when the positive electrode active substance is dissolved in a mixed acid containing hydrofluoric acid, nitric acid and hydrochloric acid; and the amount of boron element eluted when the positive electrode active substance is washed for 1 minute with ion exchanged water is 80% or more of the amount of boron element detected when the positive electrode active substance is dissolved in hydrochloric acid.
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2.发明公开公开(公告)号：US20230187653A1
公开(公告)日：2023-06-15
申请号：US17926760
申请日：2021-04-20
IPC分类号： H01M4/66 , H01M10/0525 , H01M4/525 , H01M4/505
CPC分类号： H01M4/666 , H01M10/0525 , H01M4/525 , H01M4/505 , H01M2004/028
摘要： A positive electrode for nonaqueous electrolyte secondary batteries according to the present invention is provided with a positive electrode collector and a positive electrode mixture layer that is formed on the surface of the positive electrode collector. The positive electrode mixture layer contains at least carbon fibers and a positive electrode active material that contains a lithium transition metal composite oxide; and the lithium transition metal composite oxide has a layered rock salt structure, while containing at least Ni, Al and Ca, but not substantially containing Co.
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公开(公告)号：US20230065418A1
公开(公告)日：2023-03-02
申请号：US17794798
申请日：2020-12-01
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 compound which is present on at least the surfaces of the secondary particles, while containing at least one of Ca and Sr. The lithium transition metal composite oxide contains 70% by mole or more of Ni relative to the total number of moles of the metal elements excluding Li; and the total amount of Ca and Sr in the surface modification compound is 0.5% by mole or less relative to the total number of moles of the metal elements excluding Li in the lithium transition metal composite oxide.
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公开(公告)号：US20220416229A1
公开(公告)日：2022-12-29
申请号：US17775076
申请日：2020-09-17
发明人： Rie Matsuoka , Takeshi Ogasawara , Katsuya Inoue , Yoshinori Aoki
摘要： This positive electrode active material used in a non-aqueous electrolyte secondary battery includes a lithium transition metal composite oxide containing Al and Ni in an amount of at least 80 mol % with respect to the total number of moles of metal elements excluding Li, wherein a primary particle of the lithium transition metal composite oxide has a surface modification layer containing at least Ca on the surface thereof.
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公开(公告)号：US20220407062A1
公开(公告)日：2022-12-22
申请号：US17777475
申请日：2020-09-17
发明人： Masakazu Togo , Yoshinori Aoki , Takeshi Ogasawara
IPC分类号： H01M4/525
摘要： In this non-aqueous electrolyte secondary battery: a positive electrode active material contains a lithium transition metal oxide that has a layered structure including a Li layer and that contains at least prescribed amounts of Ni, Ca, and Al; the proportion of metal elements, excluding Li, in the Li layer is 0.6-2.0 mol % with respect to the total number of moles of metal elements, excluding Li, contained in the lithium transition total oxide; a negative electrode active material has a coating containing Ca on the surface thereof; and the contained amount of Ca in the coating is not less than 15 mass ppm but less than 80 mass ppm with respect to the total mass of the positive electrode material.
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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
发明人： Yoshinori Aoki , Masakazu Togo , Takeshi Ogasawara
IPC分类号： H01M4/525 , H01M4/36 , H01M4/505 , H01M10/052 , C01G53/00
摘要： 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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公开(公告)号：US11456452B2
公开(公告)日：2022-09-27
申请号：US16471950
申请日：2017-12-14
发明人： Takaya Tochio , Kaoru Nagata , Takeshi Ogasawara
摘要： A positive electrode for a non-aqueous electrolyte secondary battery contains a first particle and a second particle. The first particle contains an electrochemically active positive-electrode active material, and the positive-electrode active material contains a lithium transition metal oxide. The second particle contains an electrochemically inactive metal oxide. An electrochemically inactive phosphate adheres to the surface of the second particle.
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公开(公告)号：US20220209229A1
公开(公告)日：2022-06-30
申请号：US17601641
申请日：2020-02-05
IPC分类号： H01M4/525 , H01M10/0525
摘要： 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：US20210359301A1
公开(公告)日：2021-11-18
申请号：US17277482
申请日：2019-09-19
摘要： A nonaqueous electrolyte secondary battery includes: a positive electrode containing a positive electrode active material; a negative electrode containing a negative electrode active material; and a nonaqueous electrolyte. The positive electrode active material includes a complex oxide containing lithium and metal M excluding lithium, where a plurality of primary particles of the complex oxide are aggregated to form a secondary particle. The metal M includes at least nickel and aluminum and/or manganese, where an atomic ratio of nickel to the metal M (Ni/M) is 0.8 or more and less than 1.0. The primary particles have an average particle size of 0.20 μm or more and 0.35 μm 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
摘要： 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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