公开(公告)号：US11283102B2

公开(公告)日：2022-03-22

申请号：US16391946

申请日：2019-04-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryohei Miyamae ,  Akira Kano ,  Kensuke Nakura

IPC: H01M10/0525 ,  H01M4/134 ,  H01M4/38 ,  H01M4/70 ,  H01M4/02

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte having lithium-ion conductivity. A negative electrode current collector includes a layer having a first surface and a second surface opposite to the first surface, first protrusions protruding from the first surface, and second protrusions protruding from the second surface. The first and second surfaces are surfaces on which lithium metal is deposited during charge. When viewed in a direction of a normal to the first surface, a total area of overlap between the first protrusions and the second protrusions is ½ or less of a total area of the first protrusions.

公开(公告)号：US11271252B2

公开(公告)日：2022-03-08

申请号：US16383244

申请日：2019-04-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

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

IPC: H01M10/0587 ,  H01M4/134 ,  H01M4/38 ,  H01M10/052 ,  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 greater 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：US11201319B2

公开(公告)日：2021-12-14

申请号：US16034424

申请日：2018-07-13

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takayuki Ishikawa ,  Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/1315 ,  H01M4/13915 ,  H01M4/36 ,  H01M4/505 ,  H01M4/62 ,  H01M4/525 ,  H01M4/485 ,  C01G45/12 ,  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 has a crystal structure that belongs to space group Fd-3m. The ration I(111)/I(400) of a first integrated intensity I(111) of a first peak corresponding to a (111) plane to a second integrated intensity I(400) of a second peak corresponding to a (400) plane in an XRD pattern of the lithium composite oxide satisfies 0.05≤I(111)/I(400)≤0.90. The covering material has an electron conductivity of 106 S/m or less.

公开(公告)号：US11024874B2

公开(公告)日：2021-06-01

申请号：US16392570

申请日：2019-04-23

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryohei Miyamae ,  Akira Kano ,  Kensuke Nakura

IPC: H01M10/0525 ,  H01M4/134 ,  H01M4/38 ,  H01M4/66 ,  H01M4/02

Abstract: A lithium secondary battery includes a positive electrode, a negative electrode, a separator, and a nonaqueous electrolyte having lithium-ion conductivity. The positive electrode contains a positive electrode active material containing lithium. The negative electrode faces the positive electrode. The separator is disposed between the positive and negative electrodes. The negative electrode includes a negative electrode current collector. The negative electrode current collector includes a layer and protrusions. The layer has a first surface on which lithium metal is deposited during charge. The protrusions protrude from the first surface. At least one of the protrusions includes a conductive material and an insulative material.

公开(公告)号：US10833317B2

公开(公告)日：2020-11-10

申请号：US15821745

申请日：2017-11-22

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/1315 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0566 ,  H01M4/36 ,  H01M4/505 ,  C01G45/00 ,  C01G51/00 ,  C01G53/00 ,  H01M4/58 ,  H01M4/485 ,  H01M4/48 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

Abstract: A positive-electrode active material contains a compound that has a crystal structure belonging to a space group FM3-M and that is represented by the composition formula (1) and a lithium ion conductor, LixMeyOαFβ  (1) wherein Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr, and the following conditions are satisfied. 1.7≤x≤2.2 0.8≤y≤1.3 1≤α≤2.5 0.5≤β≤2

公开(公告)号：US10818911B2

公开(公告)日：2020-10-27

申请号：US15813212

申请日：2017-11-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/1315 ,  H01M4/505 ,  H01M10/052 ,  C01G51/00 ,  C01G45/00 ,  H01M4/36 ,  C01G53/00 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/62 ,  H01M4/02

Abstract: A positive-electrode active material contains a compound that has a crystal structure belonging to a space group FM3-M and contains is represented by the composition formula (1) and an insulating compound, LixMeyOαFβ  (1) wherein Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr, and the following conditions are satisfied. 1.7≤x≤2.2 0.8≤y≤1.3 1≤α≤2.5 0.5≤β≤2

公开(公告)号：US10818910B2

公开(公告)日：2020-10-27

申请号：US15811685

申请日：2017-11-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/1315 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0566 ,  C01G51/00 ,  C01G45/00 ,  C01G53/00 ,  H01M4/485 ,  H01M10/0525 ,  H01M4/02

Abstract: A positive-electrode active material containing a compound that has a crystal structure belonging to the space group FM-3M and is represented by the composition formula (1): LixMeyOαFβ  (1) wherein Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, and Al, and the following conditions are satisfied.1.3≤x≤2.20.8≤y≤1.31≤α≤2.930.07≤β≤2

公开(公告)号：US10811671B2

公开(公告)日：2020-10-20

申请号：US15811684

申请日：2017-11-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/1315 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  C01G45/00 ,  C01G51/00 ,  H01M10/0566 ,  H01M10/052 ,  H01M10/0525 ,  H01M4/02

Abstract: A positive-electrode active material contains a compound that has a crystal structure belonging to a space group FM3-M and that is represented by the composition formula (1): LixAyMezOαFβ  (1) wherein A denotes Na or K, Me denotes one or two or more elements selected from the group consisting of Mn, Co, Ni, Fe, Al, B, Ce, Si, Zr, Nb, Pr, Ti, W, Ge, Mo, Sn, Bi, Cu, Mg, Ca, Ba, Sr, Y, Zn, Ga, Er, La, Sm, Yb, V, and Cr, and the following conditions are satisfied. 1.7≤x+y≤2.2 0≤y≤0.2 0.8≤z≤1.3 1≤α≤2.5 0.5≤β≤2

公开(公告)号：US10586981B2

公开(公告)日：2020-03-10

申请号：US15647265

申请日：2017-07-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Issei Ikeuchi ,  Ryuichi Natsui ,  Kensuke Nakura

IPC: H01M4/485 ,  H01M4/58 ,  H01M4/525 ,  H01M4/38 ,  C01G45/12 ,  H01M4/505 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/02

Abstract: A positive electrode active material for a battery, the positive electrode active material comprising a compound having a crystal structure of space group Fm-3m and represented by composition formula (1): LixMe1αMe2βO2 . . . (1). In the formula, Me1 represents one or more elements selected from the group consisting of Mn, Ni, Co, Fe, Al, Sn, Cu, Nb, Mo, Bi, Ti, V, Cr, Y, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ag, Ru, Ta, W, La, Ce, Pr, Sm, Eu, Dy, and Er, Me2 represents one or more elements selected from the group consisting of B, Si, and P, and the following conditions are met: 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.