公开(公告)号：US20180337395A1

公开(公告)日：2018-11-22

申请号：US15963992

申请日：2018-04-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TOORU MATSUI ,  JUNICHI SAKAMOTO ,  KAZUKO ASANO ,  AKIRA KANO ,  KENSUKE NAKURA

IPC: H01M4/134 ,  H01M4/04 ,  H01M4/46 ,  H01M4/1395 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/62 ,  H01M10/0525

CPC classification number: H01M4/70 ,  H01M4/66 ,  H01M10/052

Abstract: A lithium secondary battery includes: a positive electrode; a negative electrode including a negative electrode collector having a surface, on which a lithium metal is deposited during charge; a separator disposed between the positive electrode and the negative electrode; and a nonaqueous electrolyte solution filled between the positive electrode and the negative electrode. The negative electrode collector includes projection portions projecting from the surface toward the separator. There is no projection portion on an imaginary line extending from a first end to a second end opposite to the first end of the surface of the negative electrode collector and traversing a space between the projection portions.

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：US20190006714A1

公开(公告)日：2019-01-03

申请号：US16004439

申请日：2018-06-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： AKIRA KANO ,  HIROTETSU SUZUKI ,  JUNICHI SAKAMOTO ,  KENSUKE NAKURA

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/134 ,  H01M4/131 ,  H01M4/38 ,  H01M4/66

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode on which a lithium metal is deposited in a charged state, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte containing a nonaqueous solvent and a lithium salt containing a carborane anion.

公开(公告)号：US20190006664A1

公开(公告)日：2019-01-03

申请号：US16004437

申请日：2018-06-11

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： AKIRA KANO ,  HIROTETSU SUZUKI ,  JUNICHI SAKAMOTO ,  KENSUKE NAKURA

IPC: H01M4/38 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/134 ,  H01M4/131 ,  H01M4/66

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode depositing a lithium metal in a charged state, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte containing a nonaqueous solvent and a lithium salt represented by a formula LiB(C6H5-mRm)4, where Rs each independently represent F or CF3, and m is an integer of 1 to 5.

公开(公告)号：US20180337394A1

公开(公告)日：2018-11-22

申请号：US15963991

申请日：2018-04-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： TOORU MATSUI ,  JUNICHI SAKAMOTO ,  KAZUKO ASANO ,  AKIRA KANO ,  KENSUKE NAKURA

IPC: H01M4/134 ,  H01M10/0525 ,  H01M4/46 ,  H01M4/04 ,  H01M4/1395 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/62

CPC classification number: H01M4/134 ,  H01M4/0404 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/463 ,  H01M4/62 ,  H01M10/0525 ,  H01M2004/027 ,  H01M2004/028

Abstract: A lithium secondary battery includes: a positive electrode; a negative electrode; a separator disposed between the positive electrode and the negative electrode; and a nonaqueous electrolyte solution filled between the positive electrode and the negative electrode. The negative electrode includes: an electrically conductive layer having a surface; and lithium metal pieces arranged spaced from each other on the surface of the electrically conductive layer. There is no lithium metal on an imaginary line extending from a first end to a second end opposite to the first end of the surface of the electrically conductive layer and traversing a space between the lithium metal pieces.

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：US20180342754A1

公开(公告)日：2018-11-29

申请号：US15980216

申请日：2018-05-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： JUNICHI SAKAMOTO ,  AKIRA KANO ,  TOORU MATSUI ,  KAZUKO ASANO ,  KIYOSHI KANAMURA

IPC: H01M10/052 ,  H01M10/0562 ,  H01M10/0565 ,  H01M10/0568 ,  H01M2/16 ,  H01M4/38 ,  H01M4/76 ,  H01M4/134

Abstract: A lithium metal secondary battery includes a positive electrode, a negative electrode, a solid electrolyte, and a soft electrolyte. The negative electrode includes a negative electrode current collector having at least one hole, in which lithium metal is deposited in a charged state. The solid electrolyte is disposed on the surface, which face negative electrode current collector, of the positive electrode. The soft electrolyte fills the space between the negative electrode current collector and solid electrolyte and entering into the at least one hole. The solid and soft electrolytes have lithium ion conductivity.

公开(公告)号：US20170346091A1

公开(公告)日：2017-11-30

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 ,  C30B29/32 ,  H01G11/46 ,  H01G11/50 ,  H01G11/68 ,  H01M4/131 ,  C01G23/00 ,  H01M4/66 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02 ,  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