公开(公告)号：US10916809B2

公开(公告)日：2021-02-09

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 ,  H01M4/13 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/76 ,  H01M4/02 ,  H01M10/052

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：US10797315B2

公开(公告)日：2020-10-06

申请号：US15597179

申请日：2017-05-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akira Kano ,  Junichi Sakamoto ,  Nobuhiko Hojo

IPC: H01M4/485 ,  H01G11/06 ,  C01G23/00 ,  C30B29/32 ,  H01G11/46 ,  H01G11/50 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/02 ,  H01G11/68 ,  H01M4/62 ,  H01M4/66 ,  H01M4/04 ,  H01M4/1391

Abstract: An electrochemical device includes a negative electrode containing a negative electrode active material, a positive electrode, and an electrolyte. The negative electrode active material has a crystal structure with an Fm3m space group and contains a compound represented by composition formula (1) below, LixTiyOz   Formula (1), where 0.4≤x/y