公开(公告)号：US20250140817A1

公开(公告)日：2025-05-01

申请号：US18694224

申请日：2022-09-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yukihiro Oki ,  Kazuko Asano ,  Kensuke Nakura ,  Mitsuhiro Hibino

IPC: H01M4/38 ,  C01B33/06 ,  H01M4/36 ,  H01M10/052

Abstract: Disclosed is a negative electrode active material for a secondary battery containing: a composite material that has a silicide phase and a silicon phase, wherein the silicide phase contains an intermetallic compound of a silicon element and a metal element Me other than the silicon element, the metal element Me includes N kinds or more constituent elements Mi, where i=1 to N, and 5≤N, and a condition represented by the following expression is satisfied: 1.5

公开(公告)号：US20240379952A1

公开(公告)日：2024-11-14

申请号：US18686562

申请日：2022-08-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Jin Zhang ,  Shogo Esaki ,  Mitsuhiro Hibino ,  Kensuke Nakura

IPC: H01M4/505 ,  C01G45/00 ,  H01M4/02

Abstract: A positive electrode active material for a secondary battery includes a lithium metal composite oxide having a crystal structure based on a rock-salt structure belonging to a space group Fm-3m. The lithium metal composite oxide contains a first metal element other than Li, and a second metal element other than Li and the first metal element. The first metal element is at least one selected from the group consisting of Gd, Ce, Eu, Sm, and Yb.

公开(公告)号：US11228033B2

公开(公告)日：2022-01-18

申请号：US16503442

申请日：2019-07-03

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kensuke Nakura ,  Ryuichi Natsui ,  Shuhei Uchida ,  Takuji Tsujita

IPC: H01M4/505 ,  H01M4/131 ,  H01M4/36 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02 ,  C01G25/02 ,  C01G23/04 ,  H01M4/62 ,  B82Y30/00

Abstract: Provided is a cathode active material comprising a lithium composite oxide and a covering material which covers a surface of the lithium composite oxide. The lithium composite oxide is a multi-phase mixture including a first phase having a crystal structure which belongs to a monoclinic crystal; a second phase having a crystal structure which belongs to a hexagonal crystal; and a third phase having a crystal structure which belongs to a cubical crystal. The lithium composite oxide has an integral intensity ratio I(18°-20°)/I(43°-46°) of not less than 0.05 and not more than 0.99, where the integral intensity I(α°-β°) is an integral intensity of a peak which is a maximum peak present within a range of a diffraction angle 2θ of not less than α° and not more than β° in an X-ray diffraction pattern of the lithium composite oxide. The covering material has an electronic conductivity of not more than 106 S/m.

公开(公告)号：US11183684B2

公开(公告)日：2021-11-23

申请号：US16459614

申请日：2019-07-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takuji Tsujita ,  Kensuke Nakura ,  Shuhei Uchida ,  Ryuichi Natsui

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/02

Abstract: A cathode active material includes a lithium composite oxide and a covering material which covers a surface of the lithium composite oxide. The lithium composite oxide is a multi-phase mixture including a first phase having a crystal structure which belongs to a space group C2/m and a second phase having a crystal structure which belongs to a space group R-3m. The lithium composite oxide has an integral intensity ratio I(18°-20°)/I(43°-46°) of not less than 0.05 and not more than 1.15, where the integral intensity ratio I(18°-20°)/I(43°-46°) is a ratio of an integral intensity I(18°-20°) to an integral intensity I(43°-46°). The integral intensity I(α°-β°) is an integral intensity of a first peak which is a maximum peak present within a range of a diffraction angle 2θ of not less than α° and not more than β° in an X-ray diffraction pattern of the lithium composite oxide.

公开(公告)号：US11043661B2

公开(公告)日：2021-06-22

申请号：US15838360

申请日：2017-12-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki Ishikawa ,  Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/1315 ,  H01M4/62 ,  H01M4/505 ,  H01M4/36 ,  C07F7/08 ,  H01M4/525 ,  H01M4/485 ,  H01M4/02 ,  H01M10/0525 ,  H01M10/0565 ,  H01M10/0566

Abstract: A positive electrode active material contains a lithium composite oxyfluoride and an organosilicon compound binding to the lithium composite oxyfluoride. The organosilicon compound has insulation property.

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：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：US20190221838A1

公开(公告)日：2019-07-18

申请号：US16214208

申请日：2018-12-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki Ishikawa ,  Ryuichi Natsui ,  Issei Ikeuchi ,  Kensuke Nakura

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/48

CPC classification number: H01M4/366 ,  H01M4/483 ,  H01M4/505 ,  H01M4/525 ,  H01M2004/028 ,  H01M2300/0034 ,  H01M2300/004 ,  H01M2300/0065

Abstract: A positive electrode active material includes a lithium composite oxide and a covering material that covers a surface of the lithium composite oxide. The covering material has an electron conductivity of 106 S/m or less. The lithium composite oxide is a multiphase mixture including a first phase having a first crystal structure that belongs to a space group Fm-3m and a second phase having a second crystal structure that belongs to a space group other than a space group Fm-3m. The ratio I(18°-20°)/I(43°-46°) of a first integrated intensity I(18°-20°) of a first maximum peak present at a first diffraction angle 2θ of 18° or more and 20° or less to a second integrated intensity I(43°-46°) of a second maximum peak present at a second diffraction angle 2θ of 43° or more and 46° or less in an XRD pattern of the lithium composite oxide satisfies 0.05≤I(18°-20°)/I(43°-46°)≤0.90.

公开(公告)号：US09893356B2

公开(公告)日：2018-02-13

申请号：US14675871

申请日：2015-04-01

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/505 ,  H01M10/052 ,  H01M4/485 ,  C01G45/12 ,  H01M4/04 ,  H01M4/131 ,  H01M4/1391 ,  H01M2/16 ,  H01M4/62 ,  H01M10/0568 ,  H01M10/0569

CPC classification number: H01M4/505 ,  C01G45/1221 ,  C01G45/1228 ,  C01P2002/72 ,  C01P2002/76 ,  C01P2006/40 ,  H01M2/16 ,  H01M4/0471 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/621 ,  H01M4/624 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2300/0034 ,  H01M2300/004

Abstract: The cathode active material for a nonaqueous electrolyte secondary battery according to an aspect of the present disclosure mainly comprises a compound represented by a composition formula: LixNay(LiαNaβMn1−α−β)O2, where x, y, α, and β satisfy 0.75≦x≦1.0, 0