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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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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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公开(公告)号：US20250105259A1
公开(公告)日：2025-03-27
申请号：US18730895
申请日：2023-01-17
Inventor： Takuya Jin , Yusuke Saito , Yosuke Sato , Taisuke Asano
Abstract: A negative electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is characterized by containing composite particles that contain SiC and at least one of Si and an Si alloy, and is also characterized in that the composite particles have a crystallite diameter of 2.0 mm to 5.0 nm as calculated from the half width of the diffraction peak of the (111) plane of SiC in an XRD pattern obtained by an X-ray diffraction method.
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Patent Agency Ranking
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：US20250167220A1
公开(公告)日：2025-05-22
申请号：US18838386
申请日：2023-02-10
Inventor： Takuya Jin , Taisuke Asano
Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery according to one example of an embodiment comprises composite particles (30) that include a lithium aluminate phase (31) and a silicon phase (32) dispersed in the lithium aluminate phase (31). The lithium aluminate phase (31) contains boron, and the ratio (MAI/MB) of the aluminum percentage content (MAI) and the boron percentage content (NIB) with respect to the total amount of the elements other than oxygen constituting the lithium aluminate phase (31) and the silicon phase (32) is 1.0-30.0, inclusive.
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公开(公告)号：US20250158023A1
公开(公告)日：2025-05-15
申请号：US18839621
申请日：2023-02-08
Inventor： Takuya Jin , Taisuke Asano
Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery according to one example of an embodiment comprises composite particles (30) that include a lithium aluminate phase (31) and a silicon phase (32) dispersed in the lithium aluminate phase (31). The composite particles (30) have an internal porosity of 25% or less before being charged and discharged for the first time.
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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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