公开(公告)号：US20240347718A1

公开(公告)日：2024-10-17

申请号：US18292653

申请日：2022-07-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keisuke Asaka ,  Motohiro Sakata

IPC: H01M4/525 ,  H01M4/02

CPC classification number: H01M4/525 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode for a secondary battery including a positive electrode current collector with a positive electrode mixture layer provided its surface, wherein the positive electrode mixture layer includes first positive electrode active material particles having a first average particle size D1 and second positive electrode active material particles having a second average particle size D2, D1>D2 is satisfied, and D1 is 10 μm or more, the second positive electrode active material particles are included more in a second region than in the first region, a first region is nearer to the positive electrode current collector than the second region, 50% or more of the surface of the positive electrode current collector is a pressed-in region, and the pressed-in region is a region where the first positive electrode active material particles are pressed in to a depth of 10% or more of D1.

公开(公告)号：US20240204179A1

公开(公告)日：2024-06-20

申请号：US18555821

申请日：2022-04-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tooru Matsui ,  Keisuke Asaka ,  Hirotetsu Suzuki ,  Motohiro Sakata ,  Kensuke Nakura

IPC: H01M4/36 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/623 ,  H01M4/625 ,  H01M10/0525

Abstract: Provided is a non-aqueous electrolyte secondary battery with enhanced discharging performance. A non-aqueous electrolyte secondary battery according to one aspect of the present disclosure is provided with an electrode having: a current collector; and a mixture layer that is formed on a surface of the current collector and that contains an active material, a conducting agent, and a binding agent. The mixture layer contains a first mixture layer facing the current collector and a second mixture layer laminated on a surface of the first mixture layer. A short-circuit resistance R1 of the first mixture layer and a short-circuit resistance R2 of the second mixture layer satisfy the relationship R1

公开(公告)号：US20240186530A1

公开(公告)日：2024-06-06

申请号：US18285557

申请日：2022-04-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tooru Matsui ,  Keisuke Asaka ,  Hirotetsu Suzuki ,  Motohiro Sakata ,  Kensuke Nakura

IPC: H01M4/74 ,  H01M4/02 ,  H01M4/04 ,  H01M4/80 ,  H01M10/052 ,  H01M10/0587

CPC classification number: H01M4/747 ,  H01M4/0404 ,  H01M4/0435 ,  H01M4/806 ,  H01M10/0587 ,  H01M2004/021 ,  H01M10/052

Abstract: Provided is a nonaqueous electrolyte secondary battery having improved discharge characteristics. A nonaqueous electrolyte secondary battery according to one aspect of the present disclosure comprises an electrode including a current collector and a mixture layer that is formed on a surface of the current collector and that contains an active material. The current collector includes an electron conductive layer having a gap on the surface in contact with the mixture layer, and an electrolytic solution is present inside the electron conductive layer.

公开(公告)号：US20250132325A1

公开(公告)日：2025-04-24

申请号：US18687449

申请日：2022-07-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tooru Matsui ,  Keisuke Asaka ,  Hirotetsu Suzuki ,  Motohiro Sakata ,  Kensuke Nakura

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/66 ,  H01M10/052

Abstract: A positive electrode with a positive electrode mixture layer provided on a surface of a positive electrode current collector, which includes a first layer contacting the positive electrode current collector and a second layer contacting the first layer. The first layer includes first active material particles with a particle diameter L. The second layer includes active material particles with a particle diameter R. Third positive electrode active material particles with a particle diameter r are included at least at an interface between the first and the second layers, wherein R>L>r. The first active material particles include a lithium transition metal composite oxide with a ratio of Co in metal element atoms other than Li of 2 atom % or more. The second and third active material particles including a different lithium transition metal composite oxide than the first active material particles.

公开(公告)号：US20230253560A1

公开(公告)日：2023-08-10

申请号：US18014536

申请日：2021-06-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Keisuke Asaka ,  Motohiro Sakata

IPC: H01M4/525 ,  H01M4/62 ,  H01M4/505

CPC classification number: H01M4/525 ,  H01M4/625 ,  H01M4/505 ,  H01M2004/028

Abstract: The positive electrode for a secondary battery includes a positive electrode mixture layer including a positive electrode active material and a conductive material; the positive electrode active material includes a lithium transition metal composite oxide including at least Ni; and the conductive material includes a carbon fiber having an average fiber diameter d of 5 μm or more and 30 μm or less, and an average fiber length L of 50 μm or more and 2000 μm or less.

公开(公告)号：US20230078924A1

公开(公告)日：2023-03-16

申请号：US17801934

申请日：2021-02-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Saifullah Badar ,  Takuji Tsujita ,  Keisuke Asaka ,  Hirotetsu Suzuki ,  Motohiro Sakata

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/587 ,  H01M4/04

Abstract: A negative electrode for a secondary battery includes a negative electrode mixture layer having a negative electrode active material, a first layer covering at least a portion of a surface of the negative electrode active material, and a second layer covering at least a portion of a surface of the first layer, wherein the first layer includes a carbon material, and the second layer includes silicone.

公开(公告)号：US20230059278A1

公开(公告)日：2023-02-23

申请号：US17795684

申请日：2021-01-21

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Keisuke Asaka ,  Takuji Tsujita ,  Motohiro Sakata

IPC: H01M4/62 ,  H01M10/0568 ,  H01M10/0569 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/04 ,  H01M4/525

Abstract: A nonaqueous electrolyte secondary battery includes a positive electrode having a positive electrode mixture layer, a negative electrode, and a nonaqueous electrolyte, wherein the positive electrode mixture layer includes a positive electrode active material and inactive particles, the positive electrode active material includes a lithium-containing composite oxide, an average particle size D1 of the positive electrode active material and an average particle size D2 of the inactive particles satisfy D1>D2, and a viscosity at 30° C. of the nonaqueous electrolyte is less than 2 mPa·s.