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公开(公告)号：US20250149544A1
公开(公告)日：2025-05-08
申请号：US18730120
申请日：2023-01-12
Inventor： Kazuko Asano , Yukihiro Oki , Mitsuhiro Hibino
IPC: H01M4/134 , H01M4/02 , H01M4/133 , H01M10/0525
Abstract: A lithium ion battery having a high capacity and improved rapid charging performance is provided. A lithium ion battery according to an aspect of the present disclosure is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode has a negative electrode core body, a first negative electrode mixture layer formed on the surface of the negative electrode core body, and a second negative electrode mixture layer formed on the surface of the first negative electrode mixture layer. The first negative electrode mixture layer includes a first negative electrode active material that includes graphite. The second negative electrode mixture layer includes a second negative electrode active material that includes at least one selected from the group consisting of metals that bind to lithium, alloys that bind to lithium, and compounds that bind to lithium.
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公开(公告)号：US20250070133A1
公开(公告)日：2025-02-27
申请号：US18719069
申请日：2022-10-28
Inventor： Tooru Matsui , Yukihiro Oki , Hiroshi Kawada , Mitsuhiro Hibino , Kensuke Nakura
Abstract: The present invention provides a nonaqueous electrolyte secondary battery which comprises a positive electrode, a negative electrode and a nonaqueous electrolyte, and which is characterized in that: the positive electrode comprises a positive electrode collector and a positive electrode mixture layer that is arranged on the positive electrode collector; the positive electrode mixture layer comprises secondary particles, each of which is composed of aggregated primary particles of a positive electrode active material, and an assembly of a conductive material and the primary particles of the positive electrode active material; and the assembly is present in the gaps among the secondary particles.
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公开(公告)号：US20230055724A1
公开(公告)日：2023-02-23
申请号：US17794852
申请日：2021-01-26
Inventor： Yukihiro Oki
IPC: H01M50/449 , H01M10/0525 , H01M50/414
Abstract: This non-electrolyte secondary battery comprises: a positive electrode which has a positive electrode mixture layer including a positive electrode active material; a negative electrode which has a negative electrode mixture layer including a negative electrode active material; and a separator which is disposed between facing surfaces of the positive electrode and the negative electrode, and through which lithium ions pass. The separator is provided with a masking region in which fine pores are sealed with paraffin to prevent the lithium ions from passing therethrough.
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公开(公告)号：US20220344650A1
公开(公告)日：2022-10-27
申请号：US17763969
申请日：2020-09-29
Inventor： Yukihiro Oki , Masahisa Fujimoto
IPC: H01M4/42
Abstract: A nonaqueous electrolyte secondary battery according to the present invention is provided with a negative electrode, a positive electrode and a nonaqueous electrolyte. A negative electrode active material contained in the negative electrode contains a zinc manganese alloy containing Zn, Mn and Fe that is in an amount of 1,000 ppm or less of the total mass of Zn and Mn. With respect to the zinc manganese alloy, the molar ratio of the Zn content to the Mn content is from 3 to 13.
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公开(公告)号：US20250140820A1
公开(公告)日：2025-05-01
申请号：US18681201
申请日：2022-06-10
Inventor： Kazuko Asano , Yukihiro Oki , Mitsuhiro Hibino , Nanami Takeda
IPC: H01M4/38 , H01M4/02 , H01M4/134 , H01M10/0525
Abstract: The negative electrode active material is represented by general formula M3Me2X7 (where: M includes La and/or Ca; Me includes at least one element selected from the group consisting of Mn, Ni, Fe and Co; X includes at least one element selected from the group consisting of Ge, Si, Sn, and Al). The dislocation density of the negative electrode active material is at least 1×1015 cm−2.
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Patent Agency Ranking
公开(公告)号：US20240282946A1
公开(公告)日：2024-08-22
申请号：US18681158
申请日：2022-06-14
Inventor： Kazuko Asano , Yukihiro Oki , Nanami Takeda , Mitsuhiro Hibino
CPC classification number: H01M4/387 , C22C1/02 , C22C13/00 , H01M4/134 , H01M10/0525 , H01M2004/027
Abstract: A negative electrode active material is represented by general formula M3Me2X7 (wherein M comprises at least one of La and Ca; Me comprises at least one element that is selected from the group consisting of Mn, Ni, Fe and Co; and X comprises at least one element that is selected from the group consisting of Ge, Si, Sn, and Al). With respect to the XRD pattern obtained by XRD measurement wherein Cu is used for an anticathode, the half-value width of the diffraction peak of the (1 171) plane of the negative electrode active material is 0.4713° or more.
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公开(公告)号：US20230335726A1
公开(公告)日：2023-10-19
申请号：US18023209
申请日：2021-08-24
Inventor： Kazuko Asano , Yukihiro Oki , Nanami Takeda , Mitsuhiro Hibino
CPC classification number: H01M4/386 , H01M4/134 , C22C30/00 , H01M2004/027
Abstract: A negative electrode active material for a secondary battery includes an intermetallic compound having a cage structure. The cage structure is constituted of at least one first atom located within a cage, and a plurality of second atoms arranged in a cage-like form so as to surround the first atom. The first atom is a zirconium atom, and the plurality of the second atoms include 8 or more and 16 or less silicon atoms.
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公开(公告)号：US20230141498A1
公开(公告)日：2023-05-11
申请号：US17794076
申请日：2021-01-21
Inventor： Kazuko Asano , Yukihiro Oki , Nanami Takeda , Mitsuhiro Hibino
IPC: H01M4/38 , H01M10/0525 , H01M4/62
CPC classification number: H01M4/387 , H01M4/622 , H01M10/0525 , H01M2004/027
Abstract: Provided is a lithium ion battery with a positive electrode having a positive electrode mixture layer that contains a positive electrode active material, and a negative electrode having a negative electrode mixture layer that contains a negative electrode active material, the lithium ion battery being charged and discharged by the movement of lithium ions between the positive electrode and the negative electrode. The negative electrode mixture layer contains a negative electrode active material represented by general formula M3Me2X7 (in the formula, M includes at least one of La and Ca; Me includes at least one of Mn, Ni, Fe, and Co; and X includes at least one of Ge, Si, Sn, and Al), and a binding agent that contains cyano groups, the ratio of the binding agent in the negative electrode mixture layer being 0.5-7.0 mass% (inclusive).
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公开(公告)号：US20230100030A1
公开(公告)日：2023-03-30
申请号：US17800768
申请日：2021-02-25
Inventor： Kazuko Asano , Yukihiro Oki , Nanami Takeda , Mitsuhiro Hibino
IPC: H01M4/38 , H01M10/0525
Abstract: The present invention provides a lithium ion battery which comprises a positive electrode having a positive electrode mixture layer that contains a positive electrode active material, and a negative electrode having a negative electrode mixture layer that contains a negative electrode active material, and which is charged and discharged by the movement of lithium ions between the positive electrode and the negative electrode. The negative electrode mixture layer contains a negative electrode active material represented by general formula La3(1-x)M3xNi2(1-y)Me2yX7 (wherein M contains at least one of Ca, Mg and Sr; Me contains at least one of Mn, Co, Cu and Fe; X contains at least one of Ge, Si, Sn and Al; 0.1≤x
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公开(公告)号：US20220336799A1
公开(公告)日：2022-10-20
申请号：US17763934
申请日：2020-09-29
Inventor： Yukihiro Oki , Masahisa Fujimoto
Abstract: A nonaqueous electrolyte secondary battery according to the present invention is provided with a negative electrode, a positive electrode and a nonaqueous electrolyte. A negative electrode active material contained in the negative electrode contains a zinc manganese alloy that is represented by general formula MnZnx (3≤x≤13).
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