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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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公开(公告)号：US11450852B2
公开(公告)日：2022-09-20
申请号：US16689387
申请日：2019-11-20
Inventor： Hideharu Takezawa , Tomoki Shiozaki
IPC: H01M4/525 , H01M4/36 , H01M4/485 , H01M10/0525 , H01M4/02
Abstract: A positive electrode with a positive electrode current collector and a positive electrode mixture layer, and the positive electrode mixture layer has first and second positive electrode mixture layers. The first positive electrode mixture layer comprises a positive electrode active material composed of compound A that contains Ni, Co, Al and Li. The second positive electrode mixture layer is disposed between the first positive electrode mixture layer and the positive electrode current collector, and comprises a positive electrode active material including: said compound A; and a Li-containing compound B which is smaller in specific capacity (mAh/g) and average particle diameter than said compound A. In said compound A, a ratio of Ni to the total number of moles of the metal elements except Li is 82 mol % or more. The average particle diameter of said compound B is 55% or less of the average particle diameter of said compound A.
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公开(公告)号：US11264635B2
公开(公告)日：2022-03-01
申请号：US15861922
申请日：2018-01-04
Inventor： Yuji Oura , Tomoki Shiozaki
IPC: H01M50/595 , H01M50/59 , H01M10/052 , H01M10/0587 , H01M50/538 , H01M4/13 , H01M4/36 , H01M4/38 , H01M10/0562 , H01M10/058 , H01M50/572
Abstract: A secondary battery includes a positive electrode having a positive electrode current collector and a positive electrode active material layer; a negative electrode having a negative electrode current collector and a negative electrode active material layer; a separator interposed between the electrodes; a electrolyte; a positive electrode lead; and an insulating tape that covers part of the positive electrode. The positive electrode current collector has an exposed portion connected to the positive electrode lead. The positive electrode lead has an extending portion that projects from the exposed portion and an overlapping portion that overlaps the exposed portion. At least part of the exposed portion and at least part of the overlapping portion are covered with the insulating tape. The insulating tape has a substrate layer and an adhesive layer. The substrate layer contains a polyimide. The adhesive layer has an electrical resistance of 1 kΩ/mm2 or more at 500° C.
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24.发明授权公开(公告)号：US11201334B2
公开(公告)日：2021-12-14
申请号：US16568826
申请日：2019-09-12
Inventor： Kazuki Endo , Tomoki Shiozaki , Yuji Oura
IPC: H01M4/66 , H01M4/131 , H01M4/62 , H01M4/485 , H01M10/0525 , H01M4/02 , H01M10/052 , H01M10/0585
Abstract: A positive electrode is provided with: a positive electrode current collector constituted of aluminum as the main component; a positive electrode mixture layer formed on the positive electrode current collector aid containing a lithium-containing transition metal oxide; and a protective layer interposed between the positive electrode current collector and the positive electrode mixture layer. The protective layer contains inorganic particles, a conductive agent, and a binder material. In the positive electrode, the peel strength between the positive electrode current collector and the protective layer is higher than the peel strength between the protective layer and the positive electrode mixture layer.
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公开(公告)号：US20200373582A1
公开(公告)日：2020-11-26
申请号：US16636818
申请日：2018-07-05
Inventor： Hajime Nishino , Satoko Motomatsu , Kazuhiro Yoshii , Takao Sato , Tomoki Shiozaki
Abstract: A nonaqueous electrolyte secondary battery with a positive electrode having a positive electrode current collector and a positive electrode active material layer that is supported by a first main surface and a second main surface. The first main surface includes a first exposed section on which the positive electrode active material layer is not arranged. A positive electrode lead is connected to the first exposed section and includes an extension section and an overlapping section. At least a portion of the first exposed section, along with at least a portion of the overlapping section, is covered with a positive electrode insulating tape which has a base, a first layer that adheres to the first exposed section and to the overlapping section, and a second layer interposed between the base and the first layer; and the second layer expands when heated above a threshold.
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Patent Agency Ranking
公开(公告)号：US20200099057A1
公开(公告)日：2020-03-26
申请号：US16695920
申请日：2019-11-26
Inventor： Takahito Nakayama , Tomoki Shiozaki , Hideharu Takezawa
Abstract: This secondary battery positive electrode is provided with a positive-electrode current collector, a positive-electrode mixture layer, and an intermediate layer disposed between the positive-electrode current collector and the positive-electrode mixture layer. The intermediate layer comprises: a first intermediate layer that includes a non-oxide conductive inorganic compound and a positive-electrode active material; and a second intermediate layer that includes an insulating inorganic material and a non-oxide conductive inorganic compound. The conductive inorganic compound becomes an insulating oxide at 300° C. or above.
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公开(公告)号：US20200052303A1
公开(公告)日：2020-02-13
申请号：US16659770
申请日：2019-10-22
Inventor： Takahiro Takahashi , Takahito Nakayama , Tomoki Shiozaki , Hideharu Takezawa , Daisuke Furusawa , Yuji Oura
Abstract: Provided is a secondary battery comprising a positive electrode, a negative electrode, and an electrolyte. The positive electrode is provided with a positive electrode collector, a positive electrode mix layer containing positive electrode active substance particles, and an intermediate layer disposed between the positive electrode collector and positive electrode mix layer. The intermediate layer contains a conductor and a cured product of a curable resin having at least one selected from a glycidyl, hydroxy, carboxyl, amino, acryloyl, and methacryloyl groups.
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公开(公告)号：US20200020951A1
公开(公告)日：2020-01-16
申请号：US16582347
申请日：2019-09-25
Inventor： Daisuke Furusawa , Tomoki Shiozaki , Hideharu Takezawa , Takahito Nakayama , Yuji Oura , Takahiro Takahashi
IPC: H01M4/62 , H01M4/131 , H01M4/66 , H01M10/0525 , H01M10/0587
Abstract: According to the present invention, a positive electrode is provided with: a positive electrode current collector which contains aluminum; a positive electrode mixture layer which contains a positive electrode active material that is configured of a lithium transition metal oxide; and an intermediate layer which is arranged between the positive electrode current collector and the positive electrode mixture layer. The intermediate layer contains inorganic compound particles, a conductive material and a binder; the circularity is from 5% to 75% (inclusive); the void fraction of the intermediate layer is from 30% to 69% (inclusive); and the average circularity of the inorganic compound particles is from 5% to 75% (inclusive).
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公开(公告)号：US09947931B2
公开(公告)日：2018-04-17
申请号：US14788790
申请日：2015-07-01
Inventor： Takafumi Tsukagoshi , Tomoki Shiozaki
IPC: H01M4/62 , H01M10/0525 , H01M6/16 , H01M10/052 , H01M10/42
CPC classification number: H01M4/628 , H01M10/052 , H01M10/4235
Abstract: Provided is a nonaqueous electrolyte secondary battery including a nonaqueous electrolyte and an electrode assembly including a positive electrode, a negative electrode, and a separator disposed between the positive electrode and the negative electrode. The electrode assembly further includes a layer containing a metal oxide powder between the positive electrode and the negative electrode. The positive electrode contains a phosphate ester compound represented by Formula (1); where X and Y each independently represent a metal atom, a hydrogen atom, or an organic group; at least one of X and Y represents a metal atom; X and Y are coincident when the metal atom is divalent; and n represents an integer of 2 or more and 10 or less.
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公开(公告)号：US12206139B2
公开(公告)日：2025-01-21
申请号：US17283663
申请日：2019-10-04
Inventor： Tomoki Shiozaki , Kazuhiro Yoshii , Hajime Nishino
IPC: H01M50/586 , C08K3/22 , C08K3/32 , C09J7/25 , C09J133/08 , H01M4/02 , H01M4/525 , H01M10/0525 , H01M50/533 , H01M50/534 , H01M50/595
Abstract: A battery includes a positive electrode, a negative electrode, a positive electrode lead which is connected to the positive electrode, and a protective tape which covers the positive electrode lead. The protective tape includes a base material layer and an adhesive layer that is arranged on the base material layer; and the adhesive layer contains an adhesive material and a filler which contains at least one compound that is selected from among phosphoric acid group-containing compounds, boric acid group-containing compounds and silicic acid group-containing compounds.
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