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公开(公告)号：US20250105251A1
公开(公告)日：2025-03-27
申请号：US18973507
申请日：2024-12-09
Inventor： Yuji Oura , Yuki Tokuda
IPC: H01M4/13 , H01M4/36 , H01M4/48 , H01M4/62 , H01M10/0525
Abstract: In the present invention, this positive electrode is provided with: a collector; and a composite material layer that is formed on at least one surface of the collector. The composite material layer includes a particulate aggregate formed from inorganic substance particles which do not occlude or emit Li, a conductive material, and a binding material for binding the inorganic particles and the conductive material. According to an exemplary embodiment, the aggregate is present closer to the collector side at least with respect to the thickness-direction center of the composite material layer, and accounts for at least 1.3 vol % with respect to the volume of the composite material layer.
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公开(公告)号：US11777074B2
公开(公告)日：2023-10-03
申请号：US17273465
申请日：2019-07-25
Inventor： Satoshi Shibutani , Yuki Tokuda
CPC classification number: H01M4/131 , H01M4/381 , H01M4/58 , H01M4/621 , H01M4/661 , H01M4/666 , H01M10/05 , H01M2004/028
Abstract: This positive electrode includes a current collector, an intermediate layer which is formed at least on one surface of the current collector, and a composite material layer which is formed on the intermediate layer. The intermediate layer includes metal compound particles, a conductive material, and a binding material. The metal compound particles comprise at least one selected from a sulfated oxide, hydroxide, or oxide of alkali earth metal or alkali metal.
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公开(公告)号：US11677064B2
公开(公告)日：2023-06-13
申请号：US16771394
申请日：2018-10-26
Inventor： Yuki Tokuda , Hideharu Takezawa , Yuko Ogawa , Hiroyuki Okuda
IPC: H01M4/13 , H01M50/531 , H01M10/0587 , H01M10/0525 , H01M50/586 , H01M50/595 , H01M50/534 , H01M50/536
CPC classification number: H01M4/13 , H01M10/0525 , H01M10/0587 , H01M50/534 , H01M50/536 , H01M50/586 , H01M50/595
Abstract: An electrode group includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a positive electrode lead electrically connected to the positive electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material layer carried on each main surface of the positive electrode current collector. The positive electrode current collector has an exposed section that does not carry the positive electrode active material layer. The negative electrode includes a negative electrode current collector and a negative electrode active material layer carried on each main surface of the negative electrode current collector and has a first region and a second region. The mass of the negative electrode active material layer in the first region per unit area is smaller than the mass of the negative electrode active material layer in the second region per unit area.
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公开(公告)号：US12155041B2
公开(公告)日：2024-11-26
申请号：US17282094
申请日：2019-09-24
Inventor： Hiroyuki Okuda , Hideharu Takezawa , Yuko Ogawa , Yuki Tokuda
IPC: H01M10/0587 , H01M4/36 , H01M4/48 , H01M4/505 , H01M4/525 , H01M4/587 , H01M50/183 , H01M50/531 , H01M50/534 , H01M50/536
Abstract: The cylindrical secondary battery is provided with a wound electrode body, a positive electrode tab connected to a positive electrode, a cylindrical case body for housing the electrode body and the positive electrode tab, and a sealing body for sealing an opening of the case body. A negative electrode has, at a winding end of the negative electrode, a negative electrode current collector exposure section where no negative electrode active material layer is disposed, and the negative electrode current collector exposure section is disposed in contact with an inner surface of the case body. The positive electrode tab is disposed at the center in the longitudinal direction of the positive electrode and in a region where the number of layers of the positive electrode in a radial direction is smaller than in other regions in a cross-sectional area of the wound electrode body.
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公开(公告)号：US11254100B2
公开(公告)日：2022-02-22
申请号：US16015222
申请日：2018-06-22
Inventor： Yuki Kitai , Akira Irifune , Yuki Inoue , Yuki Tokuda
Abstract: A metal-clad laminate includes an insulating layer including a cured product of a resin composition, and a metal foil disposed on a principal surface of the insulating layer. The resin composition includes a polyphenylene ether copolymer and a thermosetting curing agent, the polyphenylene ether copolymer having an intrinsic viscosity measured in methylene chloride at 25° C. of between 0.03 dl/g and 0.12 dl/g, inclusive. And the polyphenylene ether copolymer has, at a molecular terminal, a group represented by formula (1) or formula (2) at an average number of 1.5 to 3 per one molecule. Further, the metal foil has a first surface that is in contact with the insulating layer, the first surface having a 10-point average roughness (Rz) of 2.0 μm or less. And the metal foil includes a barrier layer disposed at a side of the first surface, the barrier layer containing cobalt.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20210336257A1
公开(公告)日：2021-10-28
申请号：US17273826
申请日：2019-08-29
Inventor： Yuki Tokuda
Abstract: This slurry for secondary batteries includes inorganic particles, a binding material, and a dispersion medium. The inorganic particles are formed from a metal compound, including as main components, an alkali metal and a metal other than alkaline earth metals, the contained amount of the alkali metal being 0.001-2 mass %. A positive electrode according to an embodiment of the present invention is provided with a collector, an intermediate layer formed on at least one surface of the collector, and a mixture layer formed on the intermediate layer. The intermediate layer includes the inorganic particles, a binding material, and a conductive material.
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公开(公告)号：US12237495B2
公开(公告)日：2025-02-25
申请号：US18140877
申请日：2023-04-28
Inventor： Yuki Tokuda , Hideharu Takezawa , Yuko Ogawa , Hiroyuki Okuda
IPC: H01M4/13 , H01M10/0525 , H01M10/0587 , H01M50/531 , H01M50/534 , H01M50/536 , H01M50/586 , H01M50/595
Abstract: An electrode group includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a positive electrode lead electrically connected to the positive electrode. The positive electrode includes a positive electrode current collector and a positive electrode active material layer carried on each main surface of the positive electrode current collector. The positive electrode current collector has an exposed section that does not carry the positive electrode active material layer. The negative electrode includes a negative electrode current collector and a negative electrode active material layer carried on each main surface of the negative electrode current collector and has a first region and a second region. The mass of the negative electrode active material layer in the first region per unit area is smaller than the mass of the negative electrode active material layer in the second region per unit area.
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公开(公告)号：US12199267B2
公开(公告)日：2025-01-14
申请号：US17274853
申请日：2019-07-25
Inventor： Yuji Oura , Yuki Tokuda
IPC: H01M4/13 , H01M4/36 , H01M4/48 , H01M4/62 , H01M10/0525
Abstract: In the present invention, this positive electrode is provided with: a collector; and a composite material layer that is formed on at least one surface of the collector. The composite material layer includes a particulate aggregate formed from inorganic substance particles which do not occlude or emit Li, a conductive material, and a binding material for binding the inorganic particles and the conductive material. According to an exemplary embodiment, the aggregate is present closer to the collector side at least with respect to the thickness-direction center of the composite material layer, and accounts for at least 1.3 vol % with respect to the volume of the composite material layer.
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9.发明申请公开(公告)号：US20220359877A1
公开(公告)日：2022-11-10
申请号：US17619659
申请日：2020-04-24
Inventor： Yuki Tokuda
Abstract: A secondary battery according to one embodiment of the present invention is provided with a positive electrode, a negative electrode and a separator. The surface of the positive electrode, the negative electrode or the separator is provided with a protective layer that contains a resin component and inorganic particles that are formed of a metal compound. The inorganic particles contain at least one of 0.001-2% by mass of an alkali metal and 0.1-4% by mass of an alkaline earth metal.
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公开(公告)号：US20180297329A1
公开(公告)日：2018-10-18
申请号：US16015222
申请日：2018-06-22
Inventor： Yuki Kitai , Akira Irifune , Yuki Inoue , Yuki Tokuda
Abstract: A metal-clad laminate includes an insulating layer including a cured product of a resin composition, and a metal foil disposed on a principal surface of the insulating layer. The resin composition includes a polyphenylene ether copolymer and a thermosetting curing agent, the polyphenylene ether copolymer having an intrinsic viscosity measured in methylene chloride at 25° C. of between 0.03 dl/g and 0.12 dl/g, inclusive. And the polyphenylene ether copolymer has, at a molecular terminal, a group represented by formula (1) or formula (2) at an average number of 1.5 to 3 per one molecule. Further, the metal foil has a first surface that is in contact with the insulating layer, the first surface having a 10-point average roughness (Rz) of 2.0 μm or less. And the metal foil includes a barrier layer disposed at a side of the first surface, the barrier layer containing cobalt.
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