公开(公告)号：US10978692B2

公开(公告)日：2021-04-13

申请号：US16386758

申请日：2019-04-17

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 ,  H01M4/02

Abstract: A lithium secondary battery includes an electrode group and a nonaqueous electrolyte having lithium ion conductivity. A negative electrode includes a negative electrode current collector. The negative electrode current collector has a first surface facing an outward direction of winding of the electrode group and a second surface facing an inward direction of the winding of the electrode group. Lithium metal is deposited on the first surface and the second surface by charge. The negative electrode further includes first protrusions protruding from the first surface and second protrusions protruding from the second surface. A ratio A1X/A1 is less than a ratio A2X/A2. A1X is a sum of projected areas of the first protrusions on the first surface. A1 is an area of the first surface. A2X is a sum of projected areas of the second protrusions on the second surface. A2 is an area of the second surface.

公开(公告)号：US10886529B2

公开(公告)日：2021-01-05

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: H01M4/00 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/48 ,  H01M10/0525 ,  C01G45/12 ,  H01M4/62 ,  C01G53/00 ,  C01G51/00 ,  H01M4/02

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：US10833322B2

公开(公告)日：2020-11-10

申请号：US15844626

申请日：2017-12-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/36 ,  H01M10/0562 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/62 ,  H01M4/505 ,  H01M4/02 ,  H01M4/525 ,  H01M4/1315

Abstract: A positive electrode active material contains a lithium composite oxide and a lithium composite oxyfluoride. The lithium composite oxyfluoride covers at least part of the surface of the lithium composite oxide. The lithium composite oxyfluoride is represented by a composition formula LiαMe2βOγFδ, where Me2 represents at least one selected from the group consisting of Mn, Co, Ni, Fe, Al, Cu, V, Nb, Mo, Ti, Cr, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ru, and W; and 1.0≤α≤2.1; 0.8≤β≤1.3; 1.5≤γ≤2.9; and 0.1≤δ≤1.5. The crystal structure of the lithium composite oxyfluoride belongs to space group Fm-3m.

公开(公告)号：US10700380B2

公开(公告)日：2020-06-30

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: H01M10/0567 ,  H01M10/0568 ,  H01M10/052 ,  H01M4/131 ,  H01M4/134 ,  H01M4/38 ,  H01M4/66 ,  H01M10/0525 ,  H01M10/0569 ,  H01M4/02

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：US10651462B2

公开(公告)日：2020-05-12

申请号：US16039305

申请日：2018-07-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki Ishikawa ,  Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/00 ,  H01M4/36 ,  H01M4/505 ,  H01M4/58 ,  H01M4/525 ,  H01M4/485 ,  C01G45/12 ,  C01G51/00 ,  H01M4/62 ,  C01G53/00 ,  H01M4/02 ,  H01M10/0525

Abstract: A positive electrode active material contains a lithium composite oxide and a covering material. The lithium composite oxide contains at least one element selected from the group consisting of fluorine, chlorine, nitrogen, and sulfur. The lithium composite oxide has a crystal structure that belongs to space group C2/m. The ratio I(003)/I(104) of a first integrated intensity I(003) of a first peak corresponding to a (003) plane to a second integrated intensity I(104) of a second peak corresponding to a (104) plane in an XRD pattern of the lithium composite oxide satisfies 0.05≤I(003)/I(104)≤0.90. The covering material has an electron conductivity of 106 S/m or less.

公开(公告)号：US10403891B2

公开(公告)日：2019-09-03

申请号：US15003163

申请日：2016-01-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kazuko Asano ,  Kensuke Nakura

IPC: H01M4/485 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525 ,  C01G53/00 ,  H01M4/04 ,  H01M4/1391 ,  H01M10/0525 ,  H01M10/0569

Abstract: A positive electrode material includes an active material represented by Li2Mn(1−2x)NixMoxO3 (where 0

公开(公告)号：US20250105271A1

公开(公告)日：2025-03-27

申请号：US18724805

申请日：2022-10-31

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Youshin Lee ,  Mitsuhiro Hibino ,  Kensuke Nakura

IPC: H01M4/505 ,  H01M4/02 ,  H01M4/04 ,  H01M4/525 ,  H01M10/0525

Abstract: A positive electrode for secondary batteries according to the present invention comprises a positive electrode collector and a positive electrode mixture layer that is arranged on the positive electrode collector, and is characterized in that: the positive electrode mixture layer comprises a positive electrode active material that contains a lithium-containing composite oxide that is composed of secondary particles, each of which is formed of aggregated primary particles; a coating film that contains elemental Nb is formed on the surface of each primary particle of the lithium-containing composite oxide; and the Gini coefficient of elemental Nb as calculated from an element mapping image that is obtained by time-of-flight secondary ion mass spectrometry (TOF-SIMS) of a cross-section of the secondary particles is 0.5 or less.

公开(公告)号：US20250070133A1

公开(公告)日：2025-02-27

申请号：US18719069

申请日：2022-10-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tooru Matsui ,  Yukihiro Oki ,  Hiroshi Kawada ,  Mitsuhiro Hibino ,  Kensuke Nakura

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62

Abstract: The present invention provides a nonaqueous electrolyte secondary battery which comprises a positive electrode, a negative electrode and a nonaqueous electrolyte, and which is characterized in that: the positive electrode comprises a positive electrode collector and a positive electrode mixture layer that is arranged on the positive electrode collector; the positive electrode mixture layer comprises secondary particles, each of which is composed of aggregated primary particles of a positive electrode active material, and an assembly of a conductive material and the primary particles of the positive electrode active material; and the assembly is present in the gaps among the secondary particles.

公开(公告)号：US20250062333A1

公开(公告)日：2025-02-20

申请号：US18720834

申请日：2022-12-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Jin Zhang ,  Issei Ikeuchi ,  Mitsuhiro Hibino ,  Kensuke Nakura

IPC: H01M4/505 ,  C01G45/12 ,  H01M10/0525

Abstract: A positive electrode active material for a secondary battery contains a lithium metal composite oxide having a crystal structure based on a rock salt structure belonging to the space group Fm-3m. The lithium metal composite oxide contains at least one element A1 selected from the group consisting of Fe, Ca, Cr, Na, Al, Si, Mg, Cu, Zn, Pb, Sb, and W. The content of the element A1 in the lithium metal composite oxide is 10 ppm by mass or more and 1000 ppm by mass or less with respect to the total amount of the lithium metal composite oxide. A lattice constant a, which indicates a length in an a-axis direction of a crystal lattice of the lithium metal composite oxide is 4.09 Å or more and 4.16 Å or less.

公开(公告)号：US20250006895A1

公开(公告)日：2025-01-02

申请号：US18694558

申请日：2022-06-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shogo Esaki ,  Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/525 ,  H01M4/62

Abstract: An electrode for secondary batteries according to one embodiment of the present disclosure is provided with a collector and a mixture layer that is arranged on the collector, and is characterized in that: the mixture layer contains an electrode active material that comprises a metal element, a water-insoluble additive and a water-soluble additive; the water-soluble additive contains a polysaccharide; and the particle diameter of the polysaccharide is larger than the particle diameter of the electrode active material.