公开(公告)号：US20240178433A1

公开(公告)日：2024-05-30

申请号：US18285007

申请日：2022-03-07

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takahiro Fukuoka ,  Akira Kano

IPC: H01M10/04 ,  H01M4/131 ,  H01M4/525 ,  H01M4/66 ,  H01M10/052 ,  H01M10/0568 ,  H01M50/107 ,  H01M50/119 ,  H01M50/474

CPC classification number: H01M10/0431 ,  H01M4/131 ,  H01M4/525 ,  H01M4/661 ,  H01M10/052 ,  H01M10/0568 ,  H01M50/107 ,  H01M50/119 ,  H01M50/474

Abstract: A lithium secondary battery includes a wound type electrode group including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, a core member inserted in a hollow of the electrode group, and a nonaqueous electrolyte having a lithium ion conductivity, wherein in the negative electrode, a lithium metal deposits during charging and the lithium metal dissolves during discharging, and the electrode group has a space that allows the separator to be apart from and oppose at least one of the positive electrode and the negative electrode.

公开(公告)号：US20230369639A1

公开(公告)日：2023-11-16

申请号：US18029212

申请日：2021-09-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryohei Miyamae ,  Akira Kano

IPC: H01M10/0525 ,  H01M4/62 ,  H01M4/66

CPC classification number: H01M10/0525 ,  H01M4/623 ,  H01M4/667 ,  H01M4/131

Abstract: A lithium secondary battery includes: a positive electrode that absorbs lithium ions during discharging and releases the lithium ions during charging; a negative electrode on which lithium metal is deposited during charging and from which the lithium metal dissolves during discharging; and a non-aqueous electrolyte that has lithium ion conductivity. A surface of the negative electrode is covered with a protective layer that contains a resin material and inorganic particles having a density of 6 g/cm3 or more.

公开(公告)号：US20230335783A1

公开(公告)日：2023-10-19

申请号：US18028886

申请日：2021-08-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shoshi Terada ,  Akira Kano

IPC: H01M10/052 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/13

CPC classification number: H01M10/052 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/13

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a fluorinated vinylene ether compound A having a —CF═CH—O— bond, and a non-aqueous solvent.

公开(公告)号：US10923711B2

公开(公告)日：2021-02-16

申请号：US16391370

申请日：2019-04-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akira Kano ,  Ryohei Miyamae ,  Kiyohiro Isii ,  Kensuke Nakura

IPC: H01M4/131 ,  H01M4/134 ,  H01M4/66 ,  H01M4/70 ,  H01M10/0525 ,  H01M10/0565 ,  H01M4/02

Abstract: A lithium secondary battery comprises an electrode group and a nonaqueous electrolyte having lithium-ion conductivity. A negative electrode current collector has a first surface facing outward of winding of the electrode group and a second surface facing inward of the winding of the electrode group. At least the first surface or the second surface includes a first region and a second region that is closer to an innermost circumference of the winding of the electrode group than the first region. Protrusions include outer-circumference-side protrusions disposed on the first region and inner-circumference-side protrusions disposed on the second region. In at least the first surface or the second surface, a first area rate is smaller than a second area rate.

公开(公告)号：US10916810B2

公开(公告)日：2021-02-09

申请号：US16383219

申请日：2019-04-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akira Kano ,  Kiyohiro Isii ,  Ryohei Miyamae ,  Kensuke Nakura

IPC: H01M10/0587 ,  H01M4/134 ,  H01M4/38 ,  H01M10/052 ,  H01M4/02

Abstract: A lithium secondary battery comprises an electrode group and a nonaqueous electrolyte having lithium-ion conductivity. A negative electrode current collector has a first surface facing outward of winding of the electrode group and a second surface facing inward of the winding of the electrode group. At least the first surface or the second surface includes a first region and a second region that is closer to an innermost circumference of the winding of the electrode group than the first region. Protrusions include outer-circumference-side protrusions disposed on the first region and inner-circumference-side protrusions disposed on the second region. A first average height of the outer-circumference-side protrusions is larger than a second average height of the inner-circumference-side protrusions.

公开(公告)号：US10804572B2

公开(公告)日：2020-10-13

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 ,  H01M2/26 ,  H01M4/131 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/76 ,  H01M4/70 ,  H01M4/04 ,  H01M10/052 ,  H01M4/139

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：US10680243B2

公开(公告)日：2020-06-09

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: H01M4/583 ,  H01M10/0525 ,  H01M10/0562 ,  H01M4/58 ,  H01M4/133 ,  H01M4/136 ,  H01M4/66 ,  H01M4/587 ,  H01M4/36 ,  H01M4/02

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：US20240387861A1

公开(公告)日：2024-11-21

申请号：US18696465

申请日：2022-09-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryohei Miyamae ,  Akira Kano ,  Shinichiro Kondo

IPC: H01M10/0525 ,  H01M4/134 ,  H01M4/38 ,  H01M10/0568 ,  H01M50/414 ,  H01M50/431 ,  H01M50/446 ,  H01M50/451 ,  H01M50/491

Abstract: A disclosed lithium secondary battery includes a positive electrode (11), a negative electrode (12), a separator (50) disposed between the positive electrode (11) and the negative electrode (12), and a non-aqueous electrolyte having lithium ion conductivity. The negative electrode (12) is an electrode on which lithium metal is deposited during charging and from which the lithium metal dissolves during discharging. The separator (50) includes a substrate (51), a heat-resistant layer (52), and a spacer (53). The heat-resistant layer (52) is formed on at least one main surface selected from two main surfaces of the substrate (51). The spacer (53) is disposed on the negative electrode (12) side with respect to the substrate (51) and the heat-resistant layer (52). An average height of the spacer (53) is larger than a sum of an average thickness of the substrate and an average thickness of the heat-resistant layer.

公开(公告)号：US20230369582A1

公开(公告)日：2023-11-16

申请号：US18029209

申请日：2021-09-27

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuya Sadakane ,  Akira Kano

IPC: H01M4/525 ,  H01M10/0568 ,  H01M4/134

CPC classification number: H01M4/525 ,  H01M10/0568 ,  H01M4/134 ,  H01M10/052

Abstract: A non-aqueous electrolyte secondary battery includes a positive electrode, a negative electrode, and a non-aqueous electrolyte, in which lithium metal deposits on the negative electrode during charge, and the lithium metal dissolves from the negative electrode into the non-aqueous electrolyte during discharge. The positive electrode includes a positive electrode active material, the positive electrode active material includes a composite oxide containing lithium and a transition metal, and the non-aqueous electrolyte contains an oxalate salt. The composite oxide contains Ni and at least one selected from the group consisting of Fe, V, Ti, and Nb, and has a structure based on a crystal structure belonging to a space group R-3m.

公开(公告)号：US20220359904A1

公开(公告)日：2022-11-10

申请号：US17638500

申请日：2020-07-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shoshi Terada ,  Akira Kano

IPC: H01M10/0525 ,  H01M10/0587 ,  H01M4/134

Abstract: A lithium secondary battery including a positive electrode, a negative electrode, a lithium ion conductive nonaqueous electrolyte, and a separator disposed between the positive electrode and the negative electrode; on the negative electrode, a lithium metal deposits at the time of charging, the lithium metal dissolves in the nonaqueous electrolyte at the time of discharging; the nonaqueous electrolyte contains a cation and an anion; the cation includes a lithium ion, and at least one cation X selected from the group consisting of Na, K, Rb, Cs, Fr, Mg, Ca, Sr, Ba, and Al; and the anion includes an oxalate complex anion Y.