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公开(公告)号：US20240372107A1
公开(公告)日：2024-11-07
申请号：US18686019
申请日：2022-06-07
Inventor： Reiko Izumi , Takayuki Gonjo , Daisuke Katou , Norihiro Kotani , Hiroki Yamashita
Abstract: An electrode with a core material, a mixture layer, and an electrically conductive intermediate layer. A conductive agent contained in the intermediate layer has a particle size distribution which has a first peak that is within the particle diameter range of greater than or equal to 0.005 μm and less than or equal to 0.07 μm and a second peak that is within the particle diameter range of greater than or equal to 0.3 μm and less than or equal to 20 μm.
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公开(公告)号：US20240145721A1
公开(公告)日：2024-05-02
申请号：US18017702
申请日：2021-05-24
Inventor： Reiko Izumi , Daisuke Katou , Takuya Jin , Shinichiro Kondo
CPC classification number: H01M4/623 , C08F14/26 , H01M4/0435 , H01M4/13 , H01M4/139
Abstract: Provided is a PTFE powder that is in a dry state, wherein the percentage of fibrous particles which have an aspect ratio of 1.5 or higher with respect to all particles is 20-60%, and the average major axis size of the fibrous particles is 1-20 μm. A PTFE powder according to another embodiment of the present invention is in a dry state, wherein the percentage of fibrous particles which have an aspect ratio of 5 or higher with respect to all particles is 60% or more, and the average minor axis size of the fibrous particles is 1-20 μm.
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公开(公告)号：US20230378468A1
公开(公告)日：2023-11-23
申请号：US18027545
申请日：2021-07-07
Inventor： Daisuke Katou , Reiko Izumi , Takuya Jin , Shinichiro Kondo
IPC: H01M4/62 , H01M10/0525 , H01M4/133 , H01M4/04
CPC classification number: H01M4/623 , H01M10/0525 , H01M4/133 , H01M4/0435 , H01M2004/021
Abstract: With respect to this electrode, the coverage of the surface of a coated active material by a conductive material is from 10% to 60%; the mixture resistance of a electrode mixture material is 20 Ωcm or less in cases where the electrode mixture material is divided into three equal parts in the thickness direction, namely into a first region, a second region and a third region from a core material side, the content (a) of a PTFE powder in the first region, the content (b) of the PTFE powder in the second region and the content (c) of the PTFE powder in the third region satisfy −10%≤(c−a)/(a+b+c)≤10%.
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公开(公告)号：US20230339774A1
公开(公告)日：2023-10-26
申请号：US17763288
申请日：2020-07-21
Inventor： Mitsuru Iwai , Takuya Jin , Daisuke Katou , Tomoo Takayama
IPC: C01G53/00
CPC classification number: C01G53/42
Abstract: A method for producing a lithium-nickel composite oxide includes a step of sintering molded bodies of a mixture including a lithium-containing compound and a nickel-containing compound, in a container, to obtain sintered bodies. The ratio of space occupied by gaps between the molded bodies is 0.375 or greater.
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公开(公告)号：US20230057410A1
公开(公告)日：2023-02-23
申请号：US17794763
申请日：2021-01-21
Inventor： Daisuke Katou , Takuya Jin , Mitsuru Iwai , Tomoo Takayama
Abstract: A method for producing a lithium-transition metal composite oxide, including steps of: preparing a mixture including a lithium-containing compound and a transition metal compound; obtaining a molded body of the mixture; and sintering the molded bodies in a container having at least one vent hole, to obtain sintered bodies.
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Patent Agency Ranking
公开(公告)号：US20250046820A1
公开(公告)日：2025-02-06
申请号：US18718155
申请日：2022-10-17
Inventor： Daisuke Katou , Reiko Izumi
Abstract: An electrode (10) according to one embodiment of the present invention comprises a core member (11) and a mixture sheet (12) joined to the surface of the core member (11). The mixture sheet (12) includes an active material (21) and a fibrous binder (22) having been fibrillated. The crystalline size of the binder (22), which is obtained by X-ray diffraction measurement, is 20-32 nm.
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公开(公告)号：US20220396497A1
公开(公告)日：2022-12-15
申请号：US17773385
申请日：2020-10-13
Inventor： Mitsuru Iwai , Daisuke Katou , Takuya Jin , Tomoo Takayama
IPC: C01G53/00 , H01M10/0525
Abstract: A method for producing a lithium-transition metal composite oxide includes steps of preparing a first mixture including a lithium-containing compound and a transition metal compound, obtaining a compressed body by compressing the first mixture at least once, obtaining a molded body by molding at least the compressed body, and obtaining a sintered body by sintering the molded body.
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8.发明申请公开(公告)号：US20200035999A1
公开(公告)日：2020-01-30
申请号：US16497629
申请日：2018-02-16
Inventor： Kazuro Hayashida , Daisuke Katou
Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery includes: a lithium silicate phase including lithium silicate particles; silicon particles dispersed in the lithium silicate phase; and a low-melting point inorganic oxide that has a lower melting point than lithium silicate forming the lithium silicate particles, and that is solid at room temperature. The lithium silicate particles and the silicon particles form a particle agglomerate, and the low-melting point inorganic oxide is filled in at least a portion of voids included in the particle agglomerate.
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公开(公告)号：US20230299261A1
公开(公告)日：2023-09-21
申请号：US17909475
申请日：2021-01-19
Inventor： Shinichiro Kondo , Reiko Izumi , Daisuke Katou , Takuya Jin , Yosuke Takayama , Masateru Mikami
CPC classification number: H01M4/0471 , H01M4/0435 , H01M4/13 , H01M4/139 , H01M4/623 , H01M4/661
Abstract: This secondary battery electrode is provided with a core material configured from a metal foil that softens at less than or equal to 200° C. and an electrode mixture sheet which is bonded on the surface of the core material. The electrode mixture sheet includes an active material and a fibrous binder, and the active material bites into the core material, with the maximum bite depth at least 30% of the thickness of the core material. The fibrous binder may for example have polytetrafluoroethylene as the main component.
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公开(公告)号：US20220059835A1
公开(公告)日：2022-02-24
申请号：US17417231
申请日：2019-12-06
Inventor： Daisuke Katou , Tomoo Takayama , Takuya Jin , Mitsuru Iwai
IPC: H01M4/525 , H01M10/0525 , B28B11/24 , C01G53/00
Abstract: A method for producing a lithium-containing composite oxide, the method including: a first step of preparing a lithium hydroxide; a second step of heating a hydroxide containing nickel and a metal M1 other than lithium and nickel to 300° C. or higher and 800° C. or lower, to obtain a composite oxide containing the nickel and the metal M; a third step of mixing the lithium hydroxide and the composite oxide, to obtain a mixture; a fourth step of compression-molding the mixture, to obtain a molded body; and a fifth step of baking the molded body at 600° C. or higher and 850° C. or lower, to obtain a baked body.
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