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公开(公告)号：US20230042242A1
公开(公告)日：2023-02-09
申请号：US17788428
申请日：2020-12-01
Inventor： Takuya Sadakane , Hajime Nishino
IPC: H01M50/449 , H01M4/134 , H01M50/446 , H01M10/0525 , H01M10/44
Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The negative electrode is an electrode in which lithium metal deposits during charging and the lithium metal dissolves during discharging, the separator includes a substrate, a first layer disposed on a first side of the substrate, and a second layer disposed on a second side of the substrate, the first layer includes particles of phosphate containing lithium, the second layer includes a polymer and/or inorganic particles other than the particles of the phosphate, and the polymer is at least one selected from the group consisting of aromatic polyamide, aromatic polyimide, and aromatic polyamide-imide.
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2.发明授权公开(公告)号：US11870053B2
公开(公告)日：2024-01-09
申请号：US16576214
申请日：2019-09-19
Inventor： Takuya Sadakane , Hiroshi Kawada , Atsushi Fukui
IPC: H01M4/133 , H01M4/583 , H01M4/62 , H01M10/0525 , H01M10/0568 , H01M4/02 , H01M4/1393
CPC classification number: H01M4/133 , H01M4/1393 , H01M4/583 , H01M4/625 , H01M10/0525 , H01M10/0568 , H01M2004/027
Abstract: A secondary-battery negative electrode includes: a negative electrode collector; and a negative electrode active material layer provided on a surface of the negative electrode collector, and the negative electrode active material layer includes active material particles and amorphous carbon which covers at least parts of surfaces of the active material particles. At least a part of a surface of the amorphous carbon is covered with a film having a lithium ion permeability, the film contains an element M, and the element M is at least one selected from the group consisting of P, Si, B, V, Nb, W, Ti, Zr, Al, Ba, La, and Ta.
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公开(公告)号：US20230369582A1
公开(公告)日：2023-11-16
申请号：US18029209
申请日：2021-09-27
Inventor： Takuya Sadakane , Akira Kano
IPC: H01M4/525 , H01M10/0568 , H01M4/134
CPC classification number: H01M4/525 , H01M10/0568 , H01M4/134 , H01M10/052
Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte, in which lithium metal deposits on the negative electrode during charge, and the lithium metal dissolves from the negative electrode into the non-aqueous electrolyte during discharge. The positive electrode includes a positive electrode active material, the positive electrode active material includes a composite oxide containing lithium and a transition metal, and the non-aqueous electrolyte contains an oxalate salt. The composite oxide contains Ni and at least one selected from the group consisting of Fe, V, Ti, and Nb, and has a structure based on a crystal structure belonging to a space group R-3m.
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公开(公告)号：US20220376302A1
公开(公告)日：2022-11-24
申请号：US17772835
申请日：2020-09-17
Inventor： Takuya Sadakane
IPC: H01M10/0567 , H01M4/36 , H01M10/0525 , H01M4/525 , H01M4/505
Abstract: The nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte. The positive electrode includes a positive electrode mixture containing a positive electrode active material and an additive. The positive electrode active material contains a composite oxide containing lithium and a transition metal. The additive contains a particulate base material, and an organic compound group fixed to the surface of the base material by a covalent bond. The covalent bond contains a X—O-A bond. The element X is bonded to the organic compound group, and is at least one selected from the group consisting of Si and Ti. The element A is an element constituting the base material. The organic compound group has 2 or more carbon atoms.
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公开(公告)号：US20250149592A1
公开(公告)日：2025-05-08
申请号：US18832234
申请日：2023-01-05
Inventor： Takuya Sadakane
IPC: H01M4/62 , H01M4/02 , H01M4/36 , H01M10/0568
Abstract: A non-aqueous lithium secondary battery (10) according to an embodiment of the present invention comprises a positive electrode (11), a negative electrode (12), and a non-aqueous electrolyte, wherein during charging, a lithium metal precipitates on the negative electrode collector (40), and during discharging, the lithium metal dissolves in the non-aqueous electrolyte. The non-aqueous lithium secondary battery (10) contains a heterocyclic amine compound disposed between a positive electrode collector (30) and the negative electrode (12).
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Patent Agency Ranking
公开(公告)号：US20220407060A1
公开(公告)日：2022-12-22
申请号：US17773407
申请日：2020-09-17
Inventor： Takuya Sadakane
Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein lithium metal deposits on the negative electrode during charging, and the lithium metal dissolves in the nonaqueous electrolyte from the negative electrode during discharging. The positive electrode includes a positive electrode mixture comprising a positive electrode active material and an additive. The positive electrode active material includes a composite oxide including lithium and a transition metal. The additive includes a particulate base material, and an organic compound group fixed to a surface of the base material by a covalent bond. The covalent bond includes a X—O-A bond. The element X is bonded to the organic compound group, and is at least one selected from the group consisting of Si and Ti. The element A is an element constituting the base material. The organic compound group has 2 or more carbon atoms.
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公开(公告)号：US20210043970A1
公开(公告)日：2021-02-11
申请号：US16979612
申请日：2019-02-13
Inventor： Takuya Sadakane
IPC: H01M10/0565 , H01M4/525 , H01M10/0525 , H01M10/0567 , H01M4/66
Abstract: A lithium secondary battery having a positive electrode, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and an electrolyte, in which metallic lithium deposits on the negative electrode during charge. The electrolyte includes: an oxalate salt containing an oxalate complex as an anion, and a lithium ion as a cation; and a polycyclic compound having a thiazole ring and an aromatic ring sharing one side with the thiazole ring.
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公开(公告)号：US12206072B2
公开(公告)日：2025-01-21
申请号：US17274856
申请日：2019-07-25
Inventor： Takuya Sadakane
IPC: H01M10/0568 , H01M4/02 , H01M4/134 , H01M4/38 , H01M4/66 , H01M10/0525
Abstract: A lithium secondary battery including a positive electrode, a negative electrode having a negative electrode current collector that faces the positive electrode, and a non-aqueous electrolyte, wherein lithium metal deposits on the negative electrode during charge, and the lithium metal dissolves from the negative electrode into the non-aqueous electrolyte during discharge. The non-aqueous electrolyte includes an organic compound having a redox potential of 0 V or more and 4 V or less vs Li/Li+.
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公开(公告)号：US20230032198A1
公开(公告)日：2023-02-02
申请号：US17788421
申请日：2020-12-01
Inventor： Takuya Sadakane , Hajime Nishino
IPC: H01M50/451 , H01M50/431 , H01M50/46 , H01M10/0525 , H01M4/131
Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The negative electrode is an electrode in which lithium metal deposits during charging and the lithium metal dissolves during discharging. The separator includes a substrate and a functional layer laminated on the substrate. The functional layer includes a first layer including particles of phosphate containing lithium.
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公开(公告)号：US20210013501A1
公开(公告)日：2021-01-14
申请号：US16981502
申请日：2019-02-13
Inventor： Tomohisa Okazaki , Takuya Sadakane
IPC: H01M4/38 , H01M10/0525 , H01M4/66 , H01M10/0567
Abstract: A lithium secondary battery having a positive electrode, a separator, a negative electrode facing the positive electrode with the separator interposed therebetween, and an electrolyte, in which metallic lithium deposits on the negative electrode during charge. The electrolyte includes: an oxalate salt containing an oxalate complex as an anion, and a lithium ion as a cation; and a dicarboxylic acid diester compound. The dicarboxylic acid diester compound is contained in an amount of 0.1 mass % or more and less than 10 mass % in the electrolyte.
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