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31.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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33.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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Patent Agency Ranking
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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37.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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38.发明授权公开(公告)号：US11177481B2
公开(公告)日：2021-11-16
申请号：US16392573
申请日：2019-04-23
Inventor： Ryohei Miyamae , Akira Kano , Kensuke Nakura
IPC: H01M4/70 , H01M4/66 , H01M10/052 , H01M4/02
Abstract: A lithium secondary battery includes a positive electrode, negative electrode, a separator, and a nonaqueous electrolyte having lithium-ion conductivity. The positive electrode contains a positive electrode active material containing lithium. The negative electrode faces the positive electrode. The separator is disposed between the positive and negative electrodes. The negative electrode includes a negative electrode current collector. The negative electrode current collector includes a layer having a first surface, and protrusions protruding from the first surface. The first surface is a surface on which lithium metal is deposited during charge. The protrusions do not divide the first surface into parts.
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39.发明授权公开(公告)号：US11081687B2
公开(公告)日：2021-08-03
申请号：US16293577
申请日：2019-03-05
Inventor： Ryuichi Natsui , Junko Matsushita , Kensuke Nakura
IPC: H01M4/1315 , H01M4/505 , H01M10/0525 , H01M4/525 , H01M10/0562 , C01B33/00 , C01G45/00 , C01B35/00 , H01M10/052 , H01M10/0566 , H01M10/0565 , H01M4/02
Abstract: A positive-electrode active material contains a compound represented by the following composition formula (1): LixMeyAzOαFβ (1) where Me denotes one or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, Cu, Nb, Mo, Ti, Cr, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ru, and W, A denotes one or more elements selected from the group consisting of B, Si, and P, and the following conditions: 1.3≤x≤2.1, 0.8≤y≤1.3, 0
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公开(公告)号：US11038171B2
公开(公告)日：2021-06-15
申请号：US16405385
申请日：2019-05-07
Inventor： Kazuko Asano , Kensuke Nakura , Mitsuhiro Hibino , Jin Zhang
Abstract: An active material for a fluoride ion secondary battery includes a composite fluoride which contains: an alkali metal or NH4; a transition metal; and fluorine.
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