公开(公告)号：US20190280339A1

公开(公告)日：2019-09-12

申请号：US16254558

申请日：2019-01-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： AKIRA KANO ,  RYOHEI MIYAMAE ,  KIYOHIRO ISII ,  JUNICHI SAKAMOTO

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M2/26 ,  H01M4/66 ,  H01M4/131

Abstract: A lithium secondary battery includes a wound electrode group and a lithium-ion conductive nonaqueous electrolyte. The wound electrode group includes a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode. The negative electrode includes a negative electrode current collector. The negative electrode current collector includes: a layer having a first surface facing outward of the winding of the electrode group and a second surface facing inward of the winding of the electrode group; first protrusions protruding from the first surface; and second protrusions protruding from the second surface. Lithium metal is deposited on the first surface and the second surface by charging. A first average height of the first protrusions is higher than a second average height of the second protrusions.

公开(公告)号：US20190280340A1

公开(公告)日：2019-09-12

申请号：US16260134

申请日：2019-01-29

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： AKIRA KANO ,  RYOHEI MIYAMAE ,  KIYOHIRO ISII ,  JUNICHI SAKAMOTO

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M4/66 ,  H01M4/13

Abstract: A lithium secondary battery includes a wound electrode group and a lithium-ion conductive nonaqueous electrolyte. The wound electrode group includes a positive electrode, a negative electrode, and a separator between the positive electrode and the negative electrode. The negative electrode includes a negative electrode current collector. The negative electrode current collector includes: a layer having a first surface facing outward of the winding of the electrode group and a second surface facing inward of the winding of the electrode group; first protrusions protruding from the first surface; and second protrusions protruding from the second surface. Lithium metal is deposited on the first surface and the second surface by charging. A second average height of the second protrusions is higher than a first average height of the first protrusions.

公开(公告)号：US20190027778A1

公开(公告)日：2019-01-24

申请号：US16026047

申请日：2018-07-03

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： AKIRA KANO ,  RYOHEI MIYAMAE ,  KENSUKE NAKURA

IPC: H01M10/0525 ,  H01M10/0562 ,  H01M4/583 ,  H01M4/58 ,  H01M4/66 ,  H01M4/133 ,  H01M4/136

Abstract: A negative electrode active material includes a plurality of layers and lithium located between the plurality of layers, each of the plurality of layers containing carbon and boron, and nitrogen or phosphorus, wherein a molar ratio of the boron to the carbon is more than 0.6.

公开(公告)号：US20190020027A1

公开(公告)日：2019-01-17

申请号：US16018094

申请日：2018-06-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： GO TEI ,  RYOHEI MIYAMAE ,  AKIRA KANO

IPC: H01M4/58 ,  H01M4/36 ,  H01M10/0525 ,  C01B35/14

Abstract: A negative electrode active material includes a layered compound that includes: a plurality of layers and calcium located between the plurality of layers; each of the plurality of layers containing carbon and boron and further containing nitrogen or phosphorus.

公开(公告)号：US20180287137A1

公开(公告)日：2018-10-04

申请号：US15869047

申请日：2018-01-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： GO TEI ,  RYOHEI MIYAMAE ,  AKIRA KANO

IPC: H01M4/133 ,  H01M10/052 ,  H01M4/38

CPC classification number: H01M4/133 ,  H01M4/38 ,  H01M4/381 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/027 ,  Y02E60/122 ,  Y02T10/7011

Abstract: A negative electrode active material contains a graphite material represented by a formula CaxByC1-y, where x and y satisfy 0