公开(公告)号：US12027694B2

公开(公告)日：2024-07-02

申请号：US17056228

申请日：2019-04-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takamasa Tamura ,  Nobuhiro Sakitani ,  Takaharu Morikawa

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/58 ,  H01M4/583 ,  H01M4/587 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/02

CPC classification number: H01M4/364 ,  H01M4/386 ,  H01M4/583 ,  H01M4/587 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/021 ,  H01M2004/027

Abstract: A nonaqueous electrolyte secondary battery according to an embodiment includes a spirally wound electrode body in which a positive electrode and a negative electrode are spirally wound with a separator interposed therebetween. The negative electrode includes a negative electrode current collector, a first negative electrode mixture layer disposed on a first surface of the negative electrode current collector, and a second negative electrode mixture layer disposed on a second surface of the negative electrode current collector. The first surface and the second surface face outward and inward of the electrode body, respectively. At least the first negative electrode mixture layer includes a Si active material. The content of the Si active material in terms of Si in the second negative electrode mixture layer is lower than the content of the Si active material in terms of Si in the first negative electrode mixture layer.

公开(公告)号：US20210226199A1

公开(公告)日：2021-07-22

申请号：US17056228

申请日：2019-04-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takamasa Tamura ,  Nobuhiro Sakitani ,  Takaharu Morikawa

IPC: H01M4/36 ,  H01M10/0587 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525

Abstract: A nonaqueous electrolyte secondary battery according to an embodiment includes a spirally wound electrode body in which a positive electrode and a negative electrode are spirally wound with a separator interposed therebetween. The negative electrode includes a negative electrode current collector, a first negative electrode mixture layer disposed on a first surface of the negative electrode current collector, and a second negative electrode mixture layer disposed on a second surface of the negative electrode current collector. The first surface and the second surface face outward and inward of the electrode body, respectively. At least the first negative electrode mixture layer includes a Si active material. The content of the Si active material in terms of Si in the second negative electrode mixture layer is lower than the content of the Si active material in terms of Si in the first negative electrode mixture layer.

公开(公告)号：US12009512B2

公开(公告)日：2024-06-11

申请号：US17054881

申请日：2019-04-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takamasa Tamura ,  Nobuhiro Sakitani ,  Takaharu Morikawa

IPC: H01M4/38 ,  H01M4/36 ,  H01M4/58 ,  H01M4/583 ,  H01M4/587 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/02

CPC classification number: H01M4/386 ,  H01M4/364 ,  H01M4/583 ,  H01M4/587 ,  H01M4/64 ,  H01M10/0525 ,  H01M10/0587 ,  H01M2004/021 ,  H01M2004/027

Abstract: A nonaqueous electrolyte secondary battery according to an embodiment includes a negative electrode including a negative electrode current collector, a first negative electrode mixture layer disposed on a first surface of the negative electrode current collector, and a second negative electrode mixture layer disposed on a second surface of the negative electrode current collector. The first surface and the second surface face outward and inward of the electrode body, respectively. The first negative electrode mixture layer includes a Si active material. The content of the Si active material in teens of Si is lower in a portion of the first negative electrode mixture layer which faces the negative electrode current collector in a thickness direction of the first negative electrode mixture layer, than in a portion of the first negative electrode mixture layer which faces the surface of the first negative electrode mixture layer in the thickness direction.

公开(公告)号：US20210218019A1

公开(公告)日：2021-07-15

申请号：US17054881

申请日：2019-04-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takamasa Tamura ,  Nobuhiro Sakitani ,  Takaharu Morikawa

IPC: H01M4/38 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/587 ,  H01M10/0587 ,  H01M4/02

Abstract: A nonaqueous electrolyte secondary battery according to an embodiment includes a negative electrode including a negative electrode current collector, a first negative electrode mixture layer disposed on a first surface of the negative electrode current collector, and a second negative electrode mixture layer disposed on a second surface of the negative electrode current collector. The first surface and the second surface face outward and inward of the electrode body, respectively. The first negative electrode mixture layer includes a Si active material. The content of the Si active material in terms of Si is lower in a portion of the first negative electrode mixture layer which faces the negative electrode current collector in a thickness direction of the first negative electrode mixture layer, than in a portion of the first negative electrode mixture layer which faces the surface of the first negative electrode mixture layer in the thickness direction.