公开(公告)号：US20250046820A1

公开(公告)日：2025-02-06

申请号：US18718155

申请日：2022-10-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Daisuke Katou ,  Reiko Izumi

IPC: H01M4/62 ,  H01M4/04

Abstract: An electrode (10) according to one embodiment of the present invention comprises a core member (11) and a mixture sheet (12) joined to the surface of the core member (11). The mixture sheet (12) includes an active material (21) and a fibrous binder (22) having been fibrillated. The crystalline size of the binder (22), which is obtained by X-ray diffraction measurement, is 20-32 nm.

公开(公告)号：US20230369569A1

公开(公告)日：2023-11-16

申请号：US18038154

申请日：2021-09-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Norihiro Kotani ,  Reiko Izumi ,  Takayuki Gonjo ,  Hiroki Yamashita

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/525 ,  H01M4/04 ,  H01M4/587

CPC classification number: H01M4/366 ,  H01M4/0435 ,  H01M4/131 ,  H01M4/525 ,  H01M4/587 ,  H01M2004/021

Abstract: This electrode includes a core material, and an electrode mixture laminated on the surface of the core material. The electrode mixture contains an active material, a conductive material, and a fibrous binding material, wherein the ratio of the density of the electrode mixture to the true density of the active material is at least 72%, and the maximum infiltration depth of the active material in the core material is at most 18% of the thickness of the core material.

公开(公告)号：US20230299261A1

公开(公告)日：2023-09-21

申请号：US17909475

申请日：2021-01-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shinichiro Kondo ,  Reiko Izumi ,  Daisuke Katou ,  Takuya Jin ,  Yosuke Takayama ,  Masateru Mikami

IPC: H01M4/04 ,  H01M4/62 ,  H01M4/66 ,  H01M4/13 ,  H01M4/139

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.

公开(公告)号：US20240372107A1

公开(公告)日：2024-11-07

申请号：US18686019

申请日：2022-06-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Reiko Izumi ,  Takayuki Gonjo ,  Daisuke Katou ,  Norihiro Kotani ,  Hiroki Yamashita

IPC: H01M4/62 ,  H01M4/02

Abstract: An electrode with a core material, a mixture layer, and an electrically conductive intermediate layer. A conductive agent contained in the intermediate layer has a particle size distribution which has a first peak that is within the particle diameter range of greater than or equal to 0.005 μm and less than or equal to 0.07 μm and a second peak that is within the particle diameter range of greater than or equal to 0.3 μm and less than or equal to 20 μm.

公开(公告)号：US20240170820A1

公开(公告)日：2024-05-23

申请号：US18283636

申请日：2022-01-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Reiko Izumi ,  Satoru Maeda ,  Shinya Geshi ,  Kiyomi Kozuki

IPC: H01M50/586 ,  H01M4/02 ,  H01M4/13 ,  H01M4/139 ,  H01M4/62 ,  H01M50/533 ,  H01M50/536 ,  H01M50/593

CPC classification number: H01M50/586 ,  H01M4/13 ,  H01M4/139 ,  H01M4/62 ,  H01M50/533 ,  H01M50/536 ,  H01M50/593 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode, which is an example of this secondary battery electrode, includes: a positive electrode core material; an electrically conductive adhesive layer disposed on the positive electrode core material; and a positive electrode mixture layer disposed on the adhesive layer. The positive electrode core material includes, at one end in a lateral direction of the positive electrode core material, an exposed portion where the adhesive layer and the positive electrode mixture layer are not disposed. An insulating protection layer that includes resin is disposed on the exposed portion of the one end. A predetermined gap is provided between the protective layer and an end surface of one end in the lateral direction of the adhesive layer.

公开(公告)号：US20240162503A1

公开(公告)日：2024-05-16

申请号：US18283625

申请日：2022-01-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Reiko Izumi ,  Satoru Maeda ,  Shinya Geshi ,  Kiyomi Kozuki

IPC: H01M10/42 ,  H01M4/04 ,  H01M4/139 ,  H01M4/75 ,  H01M50/536

CPC classification number: H01M10/4235 ,  H01M4/0404 ,  H01M4/139 ,  H01M4/75 ,  H01M50/536

Abstract: A positive electrode that is an example of an electrode for a secondary battery comprises: a positive electrode core material, a conductive adhesive layer disposed on the positive electrode core material, and a positive electrode mixture layer disposed on the adhesive layer, wherein: the positive electrode core material has, at one end in the short direction of the positive electrode core material, an exposed part on which the adhesive layer and the positive electrode mixture layer are not provided; an insulating protective layer containing a resin is disposed on the exposed part at the one end; and the protective layer is in contact with the end surface at one end of the adhesive layer and the positive electrode mixture layer in the short direction.

公开(公告)号：US20250105257A1

公开(公告)日：2025-03-27

申请号：US18290900

申请日：2022-06-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki Gonjo ,  Reiko Izumi ,  Hiroki Yamashita ,  Norihiro Kotani

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/62

Abstract: An electrode is provided with a conductive intermediate layer that is arranged between a core material and a mixture layer. The mixture layer contains an active material and a first binder; and the intermediate layer contains a conductive material and a second binder. The conductive material has a particle size distribution which has a first peak that is within the particle diameter range from 0.005 μm to 0.07 μm and a second peak that is within the particle diameter range from 0.5 μm to 10 μm. The content of the particles that constitute the first peak is 1% by mass to 40% by mass of the mass of the conductive material. The second binder is mainly composed of a thermoplastic resin that has a melting point of 100° C. to 200° C., and has a composition that is different from the composition of the first binder.

公开(公告)号：US20240372069A1

公开(公告)日：2024-11-07

申请号：US18272717

申请日：2021-12-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Hiroki Yamashita ,  Reiko Izumi ,  Norihiro Kotani ,  Takayuki Gonjo

IPC: H01M4/1391 ,  H01M4/02 ,  H01M4/04 ,  H01M4/131 ,  H01M4/62

Abstract: An electrode according to one embodiment of the present disclosure comprises: a core material; and an electrode combined material that is layered onto surfaces of the core material. The electrode combined material comprises an active substance and PTFE. In an image illustrating a composition distribution obtained upon measuring a surface of the electrode combined material using energy dispersion-type X-ray analysis, the standard deviation of the area ratio of PTFE in 30 adjacent sections having a size of 150 μm×133 μm is 6% or less. When the electrode combined material is divided into three equal parts in the thickness direction to create, from the core material side, a first region, a second region, and a third region, the content (a) of PTFE in the first region, the content (b) of PTFE in the second region, and the content (c) of PTFE in the third region satisfy (c−a)/(a+b+c)≤±10%.

公开(公告)号：US20240006578A1

公开(公告)日：2024-01-04

申请号：US18037858

申请日：2021-11-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki Gonjo ,  Reiko Izumi ,  Hiroki Yamashita ,  Norihiro Kotani

IPC: H01M4/04 ,  H01M4/62 ,  H01M4/13 ,  H01M4/139 ,  H01G9/042

CPC classification number: H01M4/0435 ,  H01M4/625 ,  H01M4/623 ,  H01M4/13 ,  H01M4/139 ,  H01G9/042

Abstract: The present invention provides an electrode which is capable of reducing the interface resistance, while ensuring the strength of a core material by suppressing the amount of biting of an active material into the core material. An electrode according to one embodiment of the present disclosure comprises a core material, an electrode mixture that is superposed on the surface of the core material, and a conductive bonding layer that is formed between the core material and the electrode mixture: the electrode mixture comprises an active material and a fibrous binder; the active material bites into the core material; the maximum bite depth is 20% or less of the thickness of the core material; and the ratio of the density of the active material in the electrode mixture to the true density of the active material is 70% or more.

公开(公告)号：US20240145721A1

公开(公告)日：2024-05-02

申请号：US18017702

申请日：2021-05-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Reiko Izumi ,  Daisuke Katou ,  Takuya Jin ,  Shinichiro Kondo

IPC: H01M4/62 ,  C08F14/26 ,  H01M4/04 ,  H01M4/13 ,  H01M4/139

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.