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公开(公告)号：US20250070133A1
公开(公告)日：2025-02-27
申请号：US18719069
申请日：2022-10-28
Inventor： Tooru Matsui , Yukihiro Oki , Hiroshi Kawada , Mitsuhiro Hibino , Kensuke Nakura
Abstract: The present invention provides a nonaqueous electrolyte secondary battery which comprises a positive electrode, a negative electrode and a nonaqueous electrolyte, and which is characterized in that: the positive electrode comprises a positive electrode collector and a positive electrode mixture layer that is arranged on the positive electrode collector; the positive electrode mixture layer comprises secondary particles, each of which is composed of aggregated primary particles of a positive electrode active material, and an assembly of a conductive material and the primary particles of the positive electrode active material; and the assembly is present in the gaps among the secondary particles.
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公开(公告)号：US20250062333A1
公开(公告)日：2025-02-20
申请号：US18720834
申请日：2022-12-22
Inventor： Jin Zhang , Issei Ikeuchi , Mitsuhiro Hibino , Kensuke Nakura
IPC: H01M4/505 , C01G45/12 , H01M10/0525
Abstract: A positive electrode active material for a secondary battery contains a lithium metal composite oxide having a crystal structure based on a rock salt structure belonging to the space group Fm-3m. The lithium metal composite oxide contains at least one element A1 selected from the group consisting of Fe, Ca, Cr, Na, Al, Si, Mg, Cu, Zn, Pb, Sb, and W. The content of the element A1 in the lithium metal composite oxide is 10 ppm by mass or more and 1000 ppm by mass or less with respect to the total amount of the lithium metal composite oxide. A lattice constant a, which indicates a length in an a-axis direction of a crystal lattice of the lithium metal composite oxide is 4.09 Å or more and 4.16 Å or less.
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公开(公告)号：US20250006895A1
公开(公告)日：2025-01-02
申请号：US18694558
申请日：2022-06-15
Inventor： Shogo Esaki , Ryuichi Natsui , Kensuke Nakura
Abstract: An electrode for secondary batteries according to one embodiment of the present disclosure is provided with a collector and a mixture layer that is arranged on the collector, and is characterized in that: the mixture layer contains an electrode active material that comprises a metal element, a water-insoluble additive and a water-soluble additive; the water-soluble additive contains a polysaccharide; and the particle diameter of the polysaccharide is larger than the particle diameter of the electrode active material.
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44.发明公开公开(公告)号：US20240204166A1
公开(公告)日：2024-06-20
申请号：US18556013
申请日：2022-04-12
Inventor： Akihiro Taniguchi , Motohiro Sakata , Kaoru Inoue , Kensuke Nakura
IPC: H01M4/133 , H01M4/02 , H01M4/04 , H01M4/134 , H01M4/1393 , H01M4/1395
CPC classification number: H01M4/133 , H01M4/0404 , H01M4/134 , H01M4/1393 , H01M4/1395 , H01M2004/021 , H01M2004/027
Abstract: A negative electrode for a secondary battery according to one aspect of the present disclosure is characterized by comprising a negative electrode current collector and a negative electrode mixture layer disposed on the negative electrode current collector, and is characterized in that: the negative electrode mixture layer contains a negative electrode active material including a carbon material and a Si-based material; a pore diameter distribution of the negative electrode mixture layer as measured by a mercury press-in method has two peak values R1 and R2; the peak value R1 is in the range of 0.5-1.5 μm; the peak value R2 is in the range of 2-10 μm; an average particle diameter of the Si-based material is 4 μm or more; and the contained amount of the Si-based material with respect to the total amount of the negative electrode active material is 30 mass % or more.
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公开(公告)号：US11923529B2
公开(公告)日：2024-03-05
申请号：US17165951
申请日：2021-02-03
Inventor： Ryuichi Natsui , Kensuke Nakura
CPC classification number: H01M4/131 , C01G53/50 , H01M4/134 , H01M4/364 , H01M4/505 , H01M4/525 , C01P2002/74 , H01M2004/028
Abstract: A positive electrode active material according to the present disclosure includes a lithium composite oxide that contains first particles having a crystal structure belonging to space group R-3m and second particles having a crystal structure belonging to space group C2/m. The crystal structure of the second particles has a larger amount of cation mixing than the crystal structure of the first particles. The second particles have a smaller particle size than the first particles. Mathematical Formula 0.05≤integrated intensity ratio I(18°-20°)/I(43°-46°)≤0.99 is satisfied. The integrated intensity ratio I(18°-20°)/I(43°-46°) is a ratio of the integrated intensity I(18°-20°) to the integrated intensity I(43°-46°). The integrated intensity I(A°-B°) is the integrated intensity of a maximum peak present in the range of angle of diffraction 2θ greater than or equal to A° and less than or equal to B° in the X-ray diffraction pattern of the lithium composite oxide.
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Patent Agency Ranking
46.发明公开公开(公告)号：US20240055583A1
公开(公告)日：2024-02-15
申请号：US18267249
申请日：2021-12-24
Inventor： Kaoru Inoue , Yosuke Sato , Kensuke Nakura , Akihiro Taniguchi
CPC classification number: H01M4/366 , H01M4/587 , H01M4/5825 , H01M4/133 , H01M4/131 , H01M2004/027
Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, according to one embodiment of the present invention, is provided with a negative electrode core and a negative electrode mixture layer provided on the surface of the negative electrode core. The negative electrode mixture layer has a first layer that includes: at least one of at least one kind of metal element selected from Si, Sn, Sb, Mg, and Ge, and a compound containing said metal element; at least one of multi-walled carbon nanotubes and single-walled carbon nanotubes; and a binding agent. The negative electrode mixture layer also has a second layer that includes graphite A with a particle fracture strength of 10-35 MPa. The porosity of the first layer is preferably 50-65%.
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公开(公告)号：US20230369579A1
公开(公告)日：2023-11-16
申请号：US18028999
申请日：2021-09-14
Inventor： Jin Zhang , Issei Ikeuchi , Mitsuhiro Hibino , Kensuke Nakura
IPC: H01M4/505 , H01M4/1315 , C01B11/24
CPC classification number: H01M4/505 , C01B11/24 , H01M4/1315 , C01P2006/40
Abstract: A positive electrode active material for a secondary battery including: a lithium metal composite oxide having a crystal structure based on a rock salt structure belonging to a space group Fm-3m. The lithium metal composite oxide contains an element A1 of at least one selected from the group consisting of Ca, Al, and Si, and in the lithium metal composite oxide, a total of Ca, Al, and Si contents relative to a total of the lithimn metal composite oxide is 10 to 1000 ppm by mass.
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公开(公告)号：US20230335728A1
公开(公告)日：2023-10-19
申请号：US18028929
申请日：2021-09-14
Inventor： Jin Zhang , Issei Ikeuchi , Mitsuhiro Hibino , Kensuke Nakura
IPC: H01M4/505 , H01M4/1315 , C01G45/12
CPC classification number: H01M4/505 , H01M4/1315 , C01G45/1228 , C01P2006/40 , C01P2002/52 , C01P2002/76
Abstract: A positive electrode active material for a secondary battery includes a lithium metal composite oxide having a crystal structure based on a rock salt structure belonging to a space group Fm-3m, wherein the lithium metal composite oxide includes Ti and a metal element M1 other than Li and Ti. The metal element M1 preferably further includes at least one selected from the group consisting of Fe, Ge, Si, and Ga.
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公开(公告)号：US20230094468A1
公开(公告)日：2023-03-30
申请号：US17799761
申请日：2021-01-21
Inventor： Jin Zhang , Issei Ikeuchi , Mitsuhiro Hibino , Kensuke Nakura
IPC: H01M4/525 , H01M4/505 , H01M4/485 , H01M50/46 , H01M10/0525
Abstract: This positive electrode active material for a non-aqueous electrolyte secondary battery contains a lithium-transition metal composite oxide that has a rock salt-related structure and is represented by the compositional formula LiaMnbMcO2-xFx (in the formula: M is at least one metal element excluding Li and Mn; 2.000
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50.发明授权公开(公告)号：US11271200B2
公开(公告)日：2022-03-08
申请号：US16558335
申请日：2019-09-03
Inventor： Ryuichi Natsui , Kensuke Nakura , Junko Matsushita , Issei Ikeuchi
IPC: H01M4/50 , H01M4/505 , C01G53/00 , H01M4/36 , H01M4/525 , H01M10/0525 , H01M10/0562 , H01M4/02
Abstract: A positive-electrode active material contains a lithium composite oxide, wherein the lithium composite oxide is a multiphase mixture including a first phase, of which a crystal structure belongs to a space group Fm-3m, and a second phase, of which a crystal structure belongs to a space group Fd-3m; and in an XRD pattern of the lithium composite oxide, the integrated intensity ratio I(18°-20°)/I(43°-46°) of a first maximum peak I(18°-20°) within a first range of 18 degrees to 20 degrees at a diffraction angle 2θ to a second maximum peak I(43°-46°) within a second range of 43 degrees to 46 degrees at the diffraction angle 2θ satisfies 0.05≤I(18°-20°)/I(43°-46°)≤0.90.
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