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公开(公告)号：US11527757B2
公开(公告)日：2022-12-13
申请号：US16580195
申请日：2019-09-24
Inventor： Takahito Nakayama , Tomoki Shiozaki , Hideharu Takezawa , Daisuke Furusawa , Yuji Oura , Takahiro Takahashi
Abstract: A positive electrode used in a secondary cell that is an example of the present embodiment is provided with a positive electrode collector, an intermediate layer formed on the positive electrode collector, and a positive electrode mixture layer formed on the intermediate layer. The positive electrode mixture layer has a thermally expandable material and a positive electrode active material. The thermally expandable material content of the positive electrode mixture layer is at least 0.1% by mass and less than 5% by mass. The intermediate layer has an insulating inorganic material and a conductive agent. The insulating inorganic material content of the intermediate layer is 80-99% by mass.
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公开(公告)号：US20220115671A1
公开(公告)日：2022-04-14
申请号：US17426851
申请日：2019-12-12
Inventor： Yuko Ogawa , Hideharu Takezawa , Yuji Oura
IPC: H01M4/66
Abstract: This positive electrode is characterized by comprising a positive electrode collector, a positive electrode mixture layer that contains a lithium-containing transition metal oxide, and a protective layer that is arranged between the positive electrode collector and the positive electrode mixture layer, and is also characterized in that: the protective layer contains an inorganic compound that has a lower oxidative power than the lithium-containing transition metal oxide; a part of the lithium-containing transition metal oxide penetrates through the protective layer so as to be in contact with the positive electrode collector; and the coverage α of the main surface of the positive electrode collector by the protective layer is 50% or more.
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公开(公告)号：US20200152990A1
公开(公告)日：2020-05-14
申请号：US16744574
申请日：2020-01-16
Inventor： Yuji Oura , Tomoki Shiozaki , Hideharu Takezawa
Abstract: This positive electrode for secondary batteries is provided with: a positive electrode collector which has a plurality of recesses and projections in the surface; an intermediate layer provided on the surface of the positive electrode collector having the recesses and projections; and a positive electrode mixture layer provided on the intermediate layer and contains a positive electrode active material. This positive electrode being configured such that: the intermediate layer contains conductive material particles and inorganic material particles that have a higher resistance than the positive electrode active material: and both the ratio of the central particle diameter of the conductive material particles to the average depth of the recesses and projections of the positive electrode collector and the ratio of the central particle diameter of the inorganic material particles to the average depth of the recesses and projections of the positive electrode collector are 5:6 or less.
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公开(公告)号：US20200020921A1
公开(公告)日：2020-01-16
申请号：US16582312
申请日：2019-09-25
Inventor： Tomoki Shiozaki , Daisuke Furusawa , Yuji Oura , Takahiro Takahashi , Takahito Nakayama , Hideharu Takezawa
IPC: H01M2/26 , H01M4/131 , H01M10/0587 , H01M10/0525 , H01M4/62
Abstract: According to the present invention, a positive electrode is provided with: a positive electrode current collector; a positive electrode active material layer which contains a positive electrode active material that is configured from a lithium transition metal oxide; a protective layer which is arranged between the positive electrode current collector and the positive electrode active material layer; and a positive electrode tab which is bonded with the positive electrode current collector at a positive electrode tab bonding part where the positive electrode active material layer and the protective layer are not formed so that the positive electrode current collector is exposed. An end edge of the positive electrode active material layer facing the positive electrode tab and an end edge of the protective layer facing the positive electrode tab are arranged in different positions in the longitudinal direction of the positive electrode.
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公开(公告)号：US20240154162A1
公开(公告)日：2024-05-09
申请号：US18283093
申请日：2021-11-15
Inventor： Kazuhiro Iida , Hideharu Takezawa
IPC: H01M10/0565 , H01M10/0525
CPC classification number: H01M10/0565 , H01M10/0525 , H01M2300/0085
Abstract: This lithium ion secondary battery comprises: a negative electrode; a positive electrode; a nonaqueous electrolyte including a lithium salt; an aqueous electrolyte including a lithium salt; and a partition wall layer disposed between the negative electrode and the positive electrode. The aqueous electrolyte is in contact with the positive electrode, and the nonaqueous electrolyte is in contact with the negative electrode. The partition wall layer includes a nonaqueous solid electrolyte in which a matrix polymer and a nonaqueous electrolytic solution are formed into a complex. The matrix polymer includes a copolymer of acrylonitrile and at least one of methyl methacrylate, methyl acrylate, and vinyl acetate.
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Patent Agency Ranking
公开(公告)号：US11742492B2
公开(公告)日：2023-08-29
申请号：US16977579
申请日：2019-01-15
Inventor： Kohei Saito , Takahiro Takahashi , Hideharu Takezawa , Tomoki Shiozaki
CPC classification number: H01M4/667 , H01M4/362 , H01M4/624 , H01M4/666 , H01M2004/021 , H01M2004/028
Abstract: This positive electrode includes: a positive electrode current collector; a positive electrode mixed material layer that is formed on at least one surface of the positive electrode current collector; and a protective layer which includes an insulating inorganic compound and a conductive material, and is interposed between the positive electrode current collector and the positive electrode mixed material layer. The protective layer includes secondary particles comprising agglomerated primary particles of the inorganic compound. The median value of the particle size of the secondary particles is 30 μm or less.
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公开(公告)号：US11145938B2
公开(公告)日：2021-10-12
申请号：US16582312
申请日：2019-09-25
Inventor： Tomoki Shiozaki , Daisuke Furusawa , Yuji Oura , Takahiro Takahashi , Takahito Nakayama , Hideharu Takezawa
IPC: H01M50/531 , H01M4/131 , H01M4/62 , H01M10/0525 , H01M10/0587 , H01M4/525 , H01M4/66 , H01M4/02
Abstract: According to the present invention, a positive electrode is provided with: a positive electrode current collector; a positive electrode active material layer which contains a positive electrode active material that is configured from a lithium transition metal oxide; a protective layer which is arranged between the positive electrode current collector and the positive electrode active material layer; and a positive electrode tab which is bonded with the positive electrode current collector at a positive electrode tab bonding part where the positive electrode active material layer and the protective layer are not formed so that the positive electrode current collector is exposed. An end edge of the positive electrode active material layer facing the positive electrode tab and an end edge of the protective layer facing the positive electrode tab are arranged in different positions in the longitudinal direction of the positive electrode.
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公开(公告)号：US20200020950A1
公开(公告)日：2020-01-16
申请号：US16580195
申请日：2019-09-24
Inventor： Takahito Nakayama , Tomoki Shiozaki , Hideharu Takezawa , Daisuke Furusawa , Yuji Oura , Takahiro Takahashi
IPC: H01M4/62 , H01M4/66 , H01M4/36 , H01M4/13 , H01M10/0525
Abstract: A positive electrode used in a secondary cell that is an example of the present embodiment is provided with a positive electrode collector, an intermediate layer formed on the positive electrode collector, and a positive electrode mixture layer formed on the intermediate layer. The positive electrode mixture layer has a thermally expandable material and a positive electrode active material. The thermally expandable material content of the positive electrode mixture layer is at least 0.1% by mass and less than 5% by mass. The intermediate layer has an insulating inorganic material and a conductive agent. The insulating inorganic material content of the intermediate layer is 80-99% by mass.
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19.发明授权公开(公告)号：US10276895B2
公开(公告)日：2019-04-30
申请号：US15541890
申请日：2015-12-18
Inventor： Tetsuyuki Murata , Hideharu Takezawa , Kazunari Ando
Abstract: An objective is to improve the corrosion resistance of a positive electrode grid for lead acid batteries.Provided is a positive electrode grid for lead acid batteries, and a lead acid battery including the grid. The grid includes a lead alloy containing calcium and tin. The lead alloy has a calcium content of 0.10 mass % or less, and a tin content of 2.3 mass % or less, and a lattice constant of 4.9470 Å or less.
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公开(公告)号：US11811053B2
公开(公告)日：2023-11-07
申请号：US17040693
申请日：2019-02-22
Inventor： Takahito Nakayama , Tomoki Shiozaki , Hideharu Takezawa
CPC classification number: H01M4/364 , H01M4/131 , H01M4/66 , H01M2004/028
Abstract: A positive electrode (11) according to one embodiment is provided with: a positive electrode collector (30); a first middle layer (32) disposed on one of two surfaces of the positive electrode collector (30), the surface being on the inner circumferential side when the positive electrode collector (30) is wound; a second middle layer (34) that is disposed on the other surface that is on the outer circumferential side; and a positive electrode mixed material layer (36) disposed on the first middle layer (32) and on the second middle layer (34). The first middle layer (32) and the second middle layer (34) contain insulating particles and an electrical conductor, and the thickness of the first middle layer (32) is less than the thickness of the second middle layer (34).
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