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公开(公告)号：US20220115635A1
公开(公告)日：2022-04-14
申请号：US17426045
申请日：2019-12-18
Inventor： Youichirou Uka , Rie Matsuoka
Abstract: This positive electrode for nonaqueous electrolyte secondary batteries is provided with a collector and a mixture layer that is formed on the collector. The mixture layer comprises: a lithium transition metal oxide that contains more than 50% by mole of Ni relative to the total number of moles of metal elements other than Li; a carbon material; a polymer compound that is soluble in N-methyl-2-pyrrolidone, while having a ring structure in each repeating unit; and a polyoxyethylene amine compound.
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12.发明授权公开(公告)号：US10685787B2
公开(公告)日：2020-06-16
申请号：US15702655
申请日：2017-09-12
Inventor： Youichirou Uka , Katsuya Miyahara , Hiroshi Kojima
Abstract: An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, and a conductive polymer layer covering at least a part of the dielectric layer. The conductive polymer layer includes a conductive polymer and a polymer dopant. The polymer dopant includes a copolymer that includes a first monomer unit and a second monomer unit. The first monomer unit has a sulfonate group. Time second monomer unit has a functional group represented by a formula (i); —CO—R1—COOH (where R1 represents an aliphatic hydrocarbon group having 1 to 8 carbon atoms, an aromatic group, or a divalent group —OR2—, R2 representing an aliphatic hydrocarbon group having 1 to 8 carbon atoms or an aromatic group).
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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：US20240405192A1
公开(公告)日：2024-12-05
申请号：US18696472
申请日：2022-09-27
Inventor： Rina Yamamoto , Youichirou Uka , Yoshio Kato
Abstract: A positive electrode for a secondary battery including a positive electrode current collector, and a positive electrode mixture layer containing a positive electrode active material and disposed on a surface of the positive electrode current collector in which the positive electrode mixture layer contains a first positive electrode active material having a compressive strength of 400 MPa or less, a second positive electrode active material having a compressive strength smaller than the compressive strength of the first positive electrode active material, and when the positive electrode mixture layer is zoned into a first region and a second region having the same thickness, the first positive electrode active material is contained more in the first region than in the second region, and the second positive electrode active material is contained more in the second region than in the first region is used.
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15.发明申请公开(公告)号：US20240396000A1
公开(公告)日：2024-11-28
申请号：US18697323
申请日：2022-09-27
Inventor： Youichirou Uka , Rina Yamamoto , Yoshio Kato
IPC: H01M4/04 , H01M4/02 , H01M4/36 , H01M4/62 , H01M10/052
Abstract: A positive electrode for a secondary battery including a positive electrode current collector, and a positive electrode mixture layer containing a positive electrode active material and disposed on a surface of the positive electrode current collector, in which the positive electrode mixture layer contains a first positive electrode active material, a second positive electrode active material crushable more easily than the first positive electrode active material, and when the positive electrode mixture layer is zoned into a first region and a second region having the same thickness, the first positive electrode active material is contained more in the first region than in the second region, and the second positive electrode active material is contained more in the second region than in the first region is used. The crack ratio of the positive electrode active material in the first region is smaller than that in the second region.
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Patent Agency Ranking
16.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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公开(公告)号：US10388463B2
公开(公告)日：2019-08-20
申请号：US15812348
申请日：2017-11-14
Inventor： Youichirou Uka , Katsuya Miyahara , Hiroshi Kojima
IPC: H01G9/028 , H01G9/15 , C08K3/04 , C08L33/14 , C08G73/02 , H01G9/00 , H01G9/042 , H01G9/048 , H01G9/04
Abstract: An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, and a conductive polymer layer covering at least a part of the dielectric layer. The conductive polymer layer includes a conductive polymer and a polymer dopant. The polymer dopant includes a first copolymer including: (A) a first unit derived from a first monomer having a sulfonate group; (B) a second unit derived from a second monomer having a carboxy group; and (C) a third unit derived from a third monomer having a hydroxy group.
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公开(公告)号：US10325728B2
公开(公告)日：2019-06-18
申请号：US15790153
申请日：2017-10-23
Inventor： Youichirou Uka , Katsuya Miyahara , Hiroshi Kojima
Abstract: An electrolytic capacitor includes an anode body having a dielectric layer, a first conductive polymer layer covering at least a part of the dielectric layer, and a second conductive polymer layer covering at least a part of the first conductive polymer layer. The first conductive polymer layer includes a first conductive polymer and a first polymer dopant having a sulfonate group. The second conductive polymer layer includes a second conductive polymer and a second polymer dopant having a sulfonate group. A polymerization degree of the first conductive polymer is lower than a polymerization degree of the second conductive polymer.
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公开(公告)号：US10304634B2
公开(公告)日：2019-05-28
申请号：US15790145
申请日：2017-10-23
Inventor： Youichirou Uka , Katsuya Miyahara , Hiroshi Kojima
Abstract: An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, a first conductive polymer layer covering at least a part of the dielectric layer, and a second conductive polymer layer covering at least a part of the first conductive polymer layer. The first conductive polymer layer includes a first conductive polymer. The second conductive polymer layer includes a second conductive polymer. The first conductive polymer layer and the second conductive polymer layer each further include a first polymer dopant having a sulfonation degree of S1. At least one of the first conductive polymer layer and the second conductive polymer layer further includes a second polymer dopant having a sulfonation degree of S2. The sulfonation degree of S1 and the sulfonation degree of S2 satisfy a relation of S1
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公开(公告)号：US09728338B2
公开(公告)日：2017-08-08
申请号：US14726632
申请日：2015-06-01
Inventor： Makoto Nagashima , Youichirou Uka , Koji Okamoto , Shigetaka Furusawa
CPC classification number: H01G4/33 , H01G9/0036 , H01G9/028 , H01G9/15
Abstract: A first conductive polymer solution in which fine particles of a conductive polymer are dispersed is applied to a dielectric layer of aluminum oxide, and this solution is dried to form a first conductive polymer layer. Next, a coating solution is applied to the first conductive polymer layer, this solution containing at least one selected from an aromatic sulfonic acid having, in one molecule of the acid, a carboxyl group and a hydroxyl group, or two carboxyl groups, and a salt of the aromatic sulfonic acid. The solution is then dried to form a coating layer. Next, a second conductive polymer solution is applied to the coating layer, the solution being a solution in which fine particles of a conductive polymer are dispersed. This solution is then dried to form a second conductive polymer layer. This process gives a solid electrolyte layer of a capacitor element.
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