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：US20190326626A1

公开(公告)日：2019-10-24

申请号：US16298134

申请日：2019-03-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： AKIRA KANO ,  KIYOHIRO ISII

IPC: H01M10/0525 ,  H01M10/0587

Abstract: A lithium metal secondary battery includes a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte. The positive electrode and the negative electrode are wound to form an electrode group. The positive and negative electrodes face each other with the separator between the positive and negative electrodes. The electrode group has a space for accommodating at least part of the nonaqueous electrolyte when fully discharged. X and Y satisfy 1.00≤X/Y

公开(公告)号：US20180212245A1

公开(公告)日：2018-07-26

申请号：US15924289

申请日：2018-03-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： KIYOHIRO ISII ,  TAKUMA ASARI ,  CHIHO NOBUMORI ,  YASUYUKI ITO ,  NAO MATSUMURA

IPC: H01M4/60 ,  H01G11/86 ,  H01G11/48 ,  H01G11/58 ,  H01G11/06 ,  H01G11/50 ,  H01G11/66 ,  H01M10/0568 ,  H01M10/0525 ,  H01M4/137 ,  H01M4/1399 ,  H01M10/0585

CPC classification number: H01M4/606 ,  H01G11/06 ,  H01G11/48 ,  H01G11/50 ,  H01G11/58 ,  H01G11/66 ,  H01G11/82 ,  H01G11/86 ,  H01M4/137 ,  H01M4/1399 ,  H01M4/60 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0566 ,  H01M10/0568 ,  H01M10/058 ,  H01M10/0585 ,  H01M2004/028 ,  H01M2300/0025 ,  Y02E60/13 ,  Y02T10/7022

Abstract: A method for manufacturing an electrochemical device includes the following steps: a step of preparing a positive electrode, the positive electrode including a first current collector and a positive electrode layer containing a conductive polymer; a step of preparing a negative electrode, the negative electrode including a second current collector and a negative electrode layer; and a step of sealing the positive electrode, the negative electrode, and an electrolytic solution in an exterior body. The step of preparing the positive electrode includes a step of holding the positive electrode in depressurized atmosphere and then introducing gas containing CO2 as a primary component into the depressurized atmosphere.