公开(公告)号：US11962011B2

公开(公告)日：2024-04-16

申请号：US17056212

申请日：2019-04-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Sho Urata ,  Nobuhiro Sakitani

IPC: H01M4/62 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/02 ,  H01M4/134

CPC classification number: H01M4/622 ,  H01M4/13 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/021 ,  H01M2004/027 ,  H01M4/134 ,  H01M2300/0017 ,  Y02E60/10 ,  Y02P70/50

Abstract: A battery including a coiled electrode assembly with positive and negative electrodes coiled with a separator interposed therebetween, where the negative electrode includes a negative electrode current collector, a first negative electrode mixture layer formed on a first surface of the negative electrode current collector, the first surface facing an outside of the electrode assembly, and a second negative electrode mixture layer formed on a second surface of the negative electrode current collector, the second surface facing an inside of the electrode assembly. The first negative electrode mixture layer contains cellulose and rubber binders. A content of the cellulose binder is larger near a surface of the mixture layer than near the negative electrode current collector and a content of the rubber binder is larger near the negative electrode current collector than near the surface of the mixture layer in the thickness direction of the first negative electrode mixture layer.

公开(公告)号：US20190181423A1

公开(公告)日：2019-06-13

申请号：US16321900

申请日：2017-07-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akihiko Takada ,  Sho Urata ,  Kouhei Tuduki ,  Fumiharu Niina ,  Katsunori Yanagida

IPC: H01M4/131 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/36

Abstract: A nonaqueous electrolyte secondary battery according to an embodiment includes an electrode body, which is formed by winding a positive electrode and a negative electrode through a separator and then compressing into a flat shape, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide which contains tungsten oxide adhering to the particle surfaces thereof. The negative electrode contains a negative electrode active material, which has particle surfaces coated with an amorphous carbon film, and at least one of polyacrylic acid and a salt thereof. The pressure acting in the thickness direction of the electrode body is 5×10−2 MPa or more.

公开(公告)号：US20210313581A1

公开(公告)日：2021-10-07

申请号：US17056212

申请日：2019-04-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Sho Urata ,  Nobuhiro Sakitani

IPC: H01M4/62 ,  H01M10/0587 ,  H01M10/0525 ,  H01M4/13

Abstract: A battery including a coiled electrode assembly with positive and negative electrodes coiled with a separator interposed therebetween, where the negative electrode includes a negative electrode current collector, a first negative electrode mixture layer formed on a first surface of the negative electrode current collector, the first surface facing an outside of the electrode assembly, and a second negative electrode mixture layer formed on a second surface of the negative electrode current collector, the second surface facing an inside of the electrode assembly. The first negative electrode mixture layer contains cellulose and rubber binders. A content of the cellulose binder is larger near a surface of the mixture layer than near the negative electrode current collector and a content of the rubber binder is larger near the negative electrode current collector than near the surface of the mixture layer in the thickness direction of the first negative electrode mixture layer.

公开(公告)号：US11024837B2

公开(公告)日：2021-06-01

申请号：US16321900

申请日：2017-07-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akihiko Takada ,  Sho Urata ,  Kouhei Tuduki ,  Fumiharu Niina ,  Katsunori Yanagida

IPC: H01M4/131 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/36 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/587 ,  H01M4/62 ,  H01M4/1391

Abstract: A nonaqueous electrolyte secondary battery according to an embodiment includes an electrode body, which is formed by winding a positive electrode and a negative electrode through a separator and then compressing into a flat shape, and a nonaqueous electrolyte. The positive electrode contains a lithium transition metal oxide which contains tungsten oxide adhering to the particle surfaces thereof. The negative electrode contains a negative electrode active material, which has particle surfaces coated with an amorphous carbon film, and at least one of polyacrylic acid and a salt thereof. The pressure acting in the thickness direction of the electrode body is 5×10−2 MPa or more.