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公开(公告)号：US20250029994A1
公开(公告)日：2025-01-23
申请号：US18711765
申请日：2022-10-24
Inventor： Akihiro Kawakita , Masaki Deguchi , Katsuya Inoue , Takeshi Ogasawara
IPC: H01M4/525 , H01M4/02 , H01M4/36 , H01M4/60 , H01M10/052
Abstract: Provided is a positive electrode active material having a high capacity and improved output characteristics. The positive electrode active material included in this non-aqueous electrolyte secondary battery includes a lithium-containing complex oxide having a layered rock salt structure, and a sulfonic acid compound that is present on the surface of the lithium-containing complex oxide. The lithium-containing complex oxide contains 80 mol % or more of Ni, 1.5 mol % or more of Co, and 4 mol % or more of Al based on the total molar number of metal elements excluding Li. The sulfonic acid compound is represented by the general formula I. (In the formula, A is a Group 1 element or a Group 2 element, R is a hydrocarbon group, and n is 1 or 2.)
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12.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
Inventor： Katsuya Inoue , Takeshi Ogasawara , Yoshinori Aoki , Youichirou Uka
IPC: H01M4/66 , H01M10/0525 , H01M4/525 , H01M4/505
CPC classification number: H01M4/666 , H01M10/0525 , H01M4/525 , H01M4/505 , H01M2004/028
Abstract: 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：US20220416229A1
公开(公告)日：2022-12-29
申请号：US17775076
申请日：2020-09-17
Inventor： Rie Matsuoka , Takeshi Ogasawara , Katsuya Inoue , Yoshinori Aoki
Abstract: 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：US20250149591A1
公开(公告)日：2025-05-08
申请号：US18838111
申请日：2023-02-10
Inventor： Masakazu Togo , Katsuya Inoue , Takeshi Ogasawara , Youichirou Uka
Abstract: With respect to a positive electrode mixture layer that is contained in a nonaqueous electrolyte secondary battery, a positive electrode active material comprises a lithium-containing composite oxide that has a layered rock salt structure; the lithium-containing composite oxide contains at least Ni, Ca and Sr; with respect to the lithium-containing composite oxide, the molar ratio (Ca/Sr ratio) of the content of Ca to the content of Sr is 1 or more; the sum of the content of Ca and the content of Sr in the lithium-containing composite oxide is 0.05% by mole to 1% by mole relative to the total number of moles of metal elements in the lithium-containing composite oxide excluding Li, Ca and Sr; a conductive agent contains at least carbon fibers; the length of the carbon fibers is 0.5 μm or more; and the aspect ratio of the carbon fibers is 40 or more.
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公开(公告)号：US20250096239A1
公开(公告)日：2025-03-20
申请号：US18730957
申请日：2023-01-16
Inventor： Daizo Jito , Akihiro Kawakita , Masaki Deguchi , Katsuya Inoue , Takeshi Ogasawara
IPC: H01M4/36 , H01M4/131 , H01M4/525 , H01M4/62 , H01M10/052
Abstract: A positive electrode active material which is to be included in this nonaqueous electrolyte secondary battery and contains a lithium-containing complex oxide having a prescribed composition which has a layered evaporitic structure, wherein: the lithium-containing complex oxide contains secondary particles formed by clumping primary particles with one another; and a sulfonic acid compound represented by general formula I, one or more types of element selected from Ca and Sr, and one or more types of element selected from W, Mo, Ti, Si, Nb and Zr are present on the surface of the secondary particles or at the interface between the primary particles. (In the formula, A is a Group 1 element or a Group 2 element, R is a hydrocarbon group, and n is 1 or 2.)
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Patent Agency Ranking
公开(公告)号：US20240429370A1
公开(公告)日：2024-12-26
申请号：US18685408
申请日：2022-07-14
Inventor： Akihiro Kawakita , Katsuya Inoue , Takeshi Ogasawara
IPC: H01M4/36 , H01M4/02 , H01M4/525 , H01M4/58 , H01M10/0587 , H01M50/107 , H01M50/152 , H01M50/538
Abstract: This non-aqueous electrolyte secondary battery comprises: an electrode body in which a strip-shaped positive electrode and a strip-shaped negative electrode are wound with a separator interposed therebetween; a bottomed cylindrical exterior body having an outer diameter of 25 mm or more, that is connected to the negative electrode; and a sealing body that seals an opening at the upper end of the exterior body and is connected to the positive electrode. The positive electrode includes a positive-electrode current collector, and a positive-electrode mixture layer formed on the surface of the positive-electrode current collector, the positive-electrode mixture layer containing a positive-electrode active material and a phosphorus compound. The positive-electrode active material includes a lithium-containing composite oxide having a layered rock-salt structure. The weight per unit area of the positive-electrode mixture layer is 250 g/m2 or more. In the electrode body, three or more positive-electrode leads are led out.
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17.发明公开公开(公告)号：US20240186503A1
公开(公告)日：2024-06-06
申请号：US18282606
申请日：2022-03-16
Inventor： Naoya Fujitani , Yoshinori Aoki , Katsuya Inoue , Takeshi Ogasawara
CPC classification number: H01M4/525 , H01M4/366 , H01M10/05 , H01M2004/021 , H01M2004/028
Abstract: A positive electrode active material for non-aqueous electrolyte secondary batteries according to an example embodiment of the present invention comprises a lithium transition metal composite oxide having a layered structure and containing not less than 75 mol % of Ni with respect to the total molar quantity of elements excluding Li and O. The lithium transition metal composite oxide is of secondary particles obtained by aggregation of primary particles. A compound represented by the general formula AxByOz (where 1≤x≤2, 1≤y≤5, 4≤z≤9, A is at least one element selected from among Ca and Sr, and B is at least one element selected from among W, Mo, Ti, Si, Nb, and Zr) is adhered at at least the interface between primary particles inside the secondary particles.
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公开(公告)号：US20240145700A1
公开(公告)日：2024-05-02
申请号：US18281082
申请日：2022-01-06
Inventor： Shinya Geshi , Katsuya Inoue , Takeshi Ogasawara
IPC: H01M4/525 , H01M4/131 , H01M4/62 , H01M10/0587 , H01M50/107 , H01M50/186 , H01M50/533 , H01M50/538
CPC classification number: H01M4/525 , H01M4/131 , H01M4/625 , H01M10/0587 , H01M50/107 , H01M50/186 , H01M50/533 , H01M50/538 , H01M2004/028
Abstract: This positive electrode included in an electrode assembly includes a positive electrode current collector and a positive electrode mixture laver which is formed on the surface of the positive electrode current collector and which includes a positive electrode active material and a conductive agent. The positive electrode active material contains a lithium-containing complex oxide. The lithium-containing complex oxide has a layered rock salt structure, contains substantially no Co, and contains at least Ni and Mn. The Ni content in the lithium-containing complex oxide is not less than 70 mol % with respect to the total number of moles of metal elements excluding Li. The basis weight of the positive electrode mixture layer is not less than 250 g/m2. Three or more positive electrode leads are drawn out in the electrode assembly.
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19.发明公开公开(公告)号：US20240047645A1
公开(公告)日：2024-02-08
申请号：US18266753
申请日：2021-12-01
Inventor： Takashi Ko , Katsuya Inoue , Takeshi Ogasawara
CPC classification number: H01M4/131 , H01M4/366 , H01M4/505 , H01M4/525 , H01M4/62 , H01M10/4235 , H01M2004/028
Abstract: Provided is a positive electrode active substance that increases the discharge capacity of a battery. This positive electrode for a non-aqueous electrolyte secondary battery comprises a positive electrode current collector and a positive electrode mixture layer formed on the surface of the positive electrode current collector. The positive electrode mixture layer contains: a positive electrode active substance that includes a lithium transition metal complex oxide with a layered halite structure; and a phosphate. The lithium transition metal complex oxide contains at least nickel and aluminum, and calcium and/or strontium; the content ratio of nickel in the lithium transition metal complex oxide is at least 75 mol % relative to the total amount of metal elements other than lithium; and the phosphate content of the positive electrode mixture layer, if the positive electrode active substance content is 100 parts by mass, is 0.1-5 parts by mass.
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20.发明公开公开(公告)号：US20230216024A1
公开(公告)日：2023-07-06
申请号：US17927473
申请日：2021-04-20
Inventor： Katsuya Inoue , Takeshi Ogasawara , Yoshinori Aoki , Youichirou Uka
CPC classification number: H01M4/364 , H01M4/525 , H01M4/505 , H01M10/05 , H01M2004/028
Abstract: Provided is a positive electrode for a non-aqueous electrolyte secondary battery, the positive electrode comprising: a positive electrode current collector; and a positive electrode mixture layer formed on the surface of the positive electrode current collector. The positive electrode mixture layer contains at least carbon fibers and a positive electrode active material containing a lithium-transition metal composite oxide, wherein the lithium-transition metal composite oxide has a layered rock salt structure, is substantially free of Co, and contains at least Ni, Al, and Sr.
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