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公开(公告)号：US20250105274A1
公开(公告)日：2025-03-27
申请号：US18724795
申请日：2022-10-31
Inventor： Youshin Lee , Mitsuhiro Hibino , Kensuke Nakura
IPC: H01M4/525 , H01M4/02 , H01M4/04 , H01M10/0525
Abstract: This positive electrode comprises a positive electrode current collector, and a positive electrode mixture layer disposed on the positive electrode current collector, wherein: the positive electrode mixture layer has a positive electrode active material containing a lithium-containing composite oxide composed of secondary particles in which primary particles are aggregated; the lithium-containing composite oxide has a Nb element; the average particle diameter of the primary particles is 1 μm or less; and in a depth profile obtained by time-of-flight secondary ion mass spectrometry (TOF-SIMS) of a cross-section of the positive electrode mixture layer, when the minimum ionic strength of Nb in the region from the surface of the positive electrode mixture layer to 500 nm in the thickness direction is Imin and the maximum ionic strength of Nb in a region from 500 nm to 1000 nm in the thickness direction is Imax, Imax/Imin is at least 1.5.
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公开(公告)号：US12080872B2
公开(公告)日：2024-09-03
申请号：US17093552
申请日：2020-11-09
Inventor： Ryuichi Natsui , Kensuke Nakura
CPC classification number: H01M4/131 , C01G53/50 , H01M4/134 , H01M4/364 , H01M4/505 , H01M4/525 , H01M10/0525 , C01P2002/74 , H01M2004/028
Abstract: A positive electrode active material according to the present disclosure includes a lithium composite oxide that is a multiphase mixture including a first phase having a crystal structure belonging to a monoclinic crystal (e.g., space group C2/m), a second phase having a crystal structure belonging to a hexagonal crystal (e.g., space group R-3m), and a third phase having a crystal structure belonging to a cubic crystal (e.g., space group Fm-3m or space group Fd-3m). In addition, a battery according to an aspect of the present disclosure includes a positive electrode containing the positive electrode active material, a negative electrode, and an electrolyte. The positive electrode active material according to the present disclosure improves the capacity of the battery.
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公开(公告)号：US11955630B2
公开(公告)日：2024-04-09
申请号：US17165953
申请日：2021-02-03
Inventor： Takanori Omae , Ryuichi Natsui , Issei Ikeuchi , Kensuke Nakura
IPC: H01M4/505 , C01G45/12 , H01M4/02 , H01M10/0525
CPC classification number: H01M4/505 , C01G45/1228 , H01M10/0525 , H01M2004/028
Abstract: A positive electrode active material according to the present disclosure includes: a lithium composite oxide which includes Mn and at least one selected from the group consisting of F, Cl, and N, and S. The lithium composite oxide has a crystalline structure which belongs to the space group Fd-3m, and a relationship 1.40≤intensity ratio IMn1/IMn2≤1.90 is satisfied. The intensity ratio IMn1/IMn2 is a ratio of an intensity IMn1 to an intensity IMn2. The intensity IMn1 and the intensity IMn2 are intensities of a first proximity peak and a second proximity peak, respectively, of the Mn in a radial distribution function of the Mn included in the lithium composite oxide.
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公开(公告)号：US11955622B2
公开(公告)日：2024-04-09
申请号：US17089670
申请日：2020-11-04
Inventor： Ryuichi Natsui , Kensuke Nakura
CPC classification number: H01M4/131 , C01G53/50 , H01M4/134 , H01M4/364 , H01M4/505 , H01M4/525 , H01M10/0525 , C01P2002/74 , H01M2004/027 , H01M2004/028
Abstract: A positive electrode active material according to the present disclosure includes a lithium composite oxide. The lithium composite oxide is a multiphase mixture including a first phase having a crystal structure belonging to space group C2/m and a second phase having a crystal structure belonging to space group R-3m and includes at least one selected from the group consisting of F, Cl, N, and S. In an XRD pattern of the lithium composite oxide, the integrated intensity ratio I(20°-23°)/I(18°-20°) of a second maximum peak present in a diffraction angle 2θ range of greater than or equal to 20° and less than or equal to 23° to a first maximum peak present in a diffraction angle 2θ range of greater than or equal to 18° and less than or equal to 20° satisfies 0.05≤I(20°-23°)/I(18°-20°)≤0.26.
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公开(公告)号：US20230335729A1
公开(公告)日：2023-10-19
申请号：US18023214
申请日：2021-07-07
Inventor： Jin Zhang , Issei Ikeuchi , Mitsuhiro Hibino , Kensuke Nakura
CPC classification number: H01M4/525 , H01M50/46 , H01M2004/028
Abstract: A positive electrode active material for a secondary battery has a lithium metal composite oxide having a crystal structure based on a rock salt structure belonging to a space group Fm-3m, and the crystal structure has a vacancy to which no lithium or metal atom is disposed. For the lithium metal composite oxide, for example, a composite oxide represented by a composition formula LiaMnbMcO2-dFd (where M is at least one metal element excluding Li and Mn, 0
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Patent Agency Ranking
公开(公告)号：US11637277B2
公开(公告)日：2023-04-25
申请号：US17028424
申请日：2020-09-22
Inventor： Ryuichi Natsui , Kensuke Nakura
IPC: H01M4/1315 , H01M4/505 , H01M4/525 , H01M10/052 , H01M10/0566 , C01G51/00 , C01G45/00 , C01G53/00 , H01M4/485 , H01M10/0525 , H01M4/02
Abstract: A positive-electrode active material containing a compound that has a crystal structure belonging to the space group FM-3M and is represented by the composition formula (1): LixMeyOαFβ (1) wherein Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, and Al, and the following conditions are satisfied.
1.3≤x≤2.2,
0.8≤y≤1.3,
1≤α≤2.93,
0.07≤β≤2.-
17.发明授权公开(公告)号：US11605814B2
公开(公告)日：2023-03-14
申请号：US16683275
申请日：2019-11-14
Inventor： Ryuichi Natsui , Kensuke Nakura , Junko Matsushita , Issei Ikeuchi
IPC: H01M4/505 , H01M4/525 , H01M10/0562 , H01M10/0565 , H01M10/052 , H01M4/02 , C01D15/02 , H01M10/0566
Abstract: A positive-electrode active material contains a lithium composite oxide containing manganese. The crystal structure of the lithium composite oxide belongs to a space group Fd-3m. The integrated intensity ratio I(111)/I(400) of a first peak I(111) on the (111) plane to a second peak I(400) on the (400) plane in an XRD pattern of the lithium composite oxide satisfies 0.05≤I(111)/I(400)≤0.90.
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公开(公告)号：US20230053476A1
公开(公告)日：2023-02-23
申请号：US17800357
申请日：2021-02-10
Inventor： Youshin Lee , Ryuichi Natsui , Mitsuhiro Hibino , Kensuke Nakura
IPC: H01M4/525 , H01M4/505 , H01M4/485 , H01M10/0525 , H01M50/46
Abstract: This positive-electrode active material for a non-aqueous electrolyte secondary battery contains a lithium and transition metal composite oxide represented by the composition formula: LixMnyNixGeaMbO2-cFc (where, M is at least one elements selected from Ti, Co, Si, Al, Nb, W, Mo, P, Ca, Mg, Sb, Na, B, V, Cr, Fe, Cu, Zn, Sr, Zr, Ru, K, and Bi; 1.0
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19.发明授权公开(公告)号：US11557760B2
公开(公告)日：2023-01-17
申请号：US16597813
申请日：2019-10-09
Inventor： Ryuichi Natsui , Kensuke Nakura , Junko Matsushita , Issei Ikeuchi
Abstract: A positive-electrode active material contains a lithium composite oxide containing at least one selected from the group consisting of F, Cl, N, and S. The crystal structure of the lithium composite oxide belongs to a space group C2/m. An XRD pattern of the lithium composite oxide comprises a first peak within the first range of 44 degrees to 46 degrees of a diffraction angle 2θ and a second peak within the second range of 18 degrees to 20 degrees of the diffraction angle 2θ. The ratio of the second integrated intensity of the second peak to the first integrated intensity of the first peak is within a range of 0.05 to 0.90.
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20.发明授权公开(公告)号：US11271204B2
公开(公告)日：2022-03-08
申请号：US16984877
申请日：2020-08-04
Inventor： Jin Zhang , Kazuko Asano , Mitsuhiro Hibino , Kensuke Nakura
Abstract: Provided is an active material for a fluoride-ion secondary battery, the active material containing a composite fluoride. The composite fluoride has a layered structure and is represented by a composition formula AmMnFx, where A is an alkali metal, M is a transition metal, 0
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