公开(公告)号：US20220209229A1

公开(公告)日：2022-06-30

申请号：US17601641

申请日：2020-02-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Manabu Takijiri ,  Takeshi Ogasawara ,  Motoharu Saito ,  Yoshinori Aoki

IPC: H01M4/525 ,  H01M10/0525

Abstract: This positive electrode for a nonaqueous electrolyte secondary battery is provided with: a positive electrode active material including lithium composite oxide particles containing not less than 80 mol % but less than 100 mol % of Ni with respect to the total number of moles of metal elements other than Li; and a conductive material, wherein the lithium composite oxide particles include particles each having a step-like structure with three or more stacked flat surfaces having an outer edge length of 1 μm or more, and the average particle size of the conductive material is 30 nm or less.

公开(公告)号：US20250070152A1

公开(公告)日：2025-02-27

申请号：US18722077

申请日：2022-12-06

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Motoharu Saito ,  Takeshi Ogasawara

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/505 ,  H01M10/052

Abstract: Provided is a non-aqueous electrolyte secondary battery that exhibits an improved charging/discharging efficiency at low cost. A positive electrode active material included in this non-aqueous electrolyte secondary battery includes a lithium-transition metal composite oxide containing 90 mol % or more of Ni and Mn with respect to the total molar amount of metal elements other than Li. The lithium-transition metal composite oxide is composed of single particles and/or secondary particles formed through aggregation of 2-100 of the single particles. The average particle size of the single particles is 0.5-1.5 μm. A boron compound is attached on the surface of the lithium-transition metal composite oxide.

公开(公告)号：US20240290967A1

公开(公告)日：2024-08-29

申请号：US18572908

申请日：2022-05-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Motoharu Saito ,  Takao Kokubu ,  Takeshi Ogasawara

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/131

CPC classification number: H01M4/525 ,  H01M4/131 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided is a positive electrode for a nonaqueous electrolyte secondary battery of one embodiment, wherein a positive electrode active substance is constituted of single particles having no grain boundary therein. The single particles include first single particles having a particle diameter of at least 4 μm, and second single particles having a particle diameter smaller than that of the first single particles. In a positive electrode mixture layer, the second single particles are disposed around the first single particles. The second single particle, among the second single particles disposed adjacent to the first single particles, with the smallest particle diameter has a particle diameter that is no more than ⅕ of the particle diameter of the first single particle adjacent to said second single particle. The first single particles account for 3-30% relative to the total number of the particles in the positive electrode active substance.

公开(公告)号：US20240308875A1

公开(公告)日：2024-09-19

申请号：US18572921

申请日：2022-06-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Motoharu Saito ,  Takao Kokubu ,  Takeshi Ogasawara

IPC: C01G53/00 ,  H01M4/02 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/62

CPC classification number: C01G53/50 ,  H01M4/0404 ,  H01M4/1391 ,  C01P2002/90 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/40 ,  H01M2004/028 ,  H01M4/623 ,  H01M4/625

Abstract: The cathode active material for a non-aqueous electrolyte secondary battery according to one exemplary embodiment of the present invention includes a lithium-transition metal compound oxide containing, relative to a total molar amount of metallic elements except for Li, no less than 90 mol % at least one metallic element selected from Ni, Mn, Fe, and Al. The lithium-transition metal compound oxide comprises particles having a minor axis diameter of 0.5-6.0 μm, the particles having 2-10 crystal planes therein.

公开(公告)号：US20230238525A1

公开(公告)日：2023-07-27

申请号：US17919022

申请日：2021-03-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Motoharu Saito ,  Takeshi Ogasawara

IPC: H01M4/525 ,  H01M4/36 ,  H01M10/0525

CPC classification number: H01M4/525 ,  H01M4/364 ,  H01M10/0525 ,  H01M2004/028

Abstract: This positive electrode active material for non-aqueous electrolyte secondary batteries is composed of single particles and/or secondary particles containing not more than 10 primary particles, of a lithium transition metal composite oxide containing not less than 85% by mole of Ni relative to the total number of moles of metal elements other than Li. In the positive electrode active material, the particle cross-sections of the single particles and the primary particles of the lithium transition metal composite oxide each have a polygonal shape that includes a side having a length of 1.5 μm or greater, and at least three interior angles of the polygonal shape are 45-160°.

公开(公告)号：US20200036005A1

公开(公告)日：2020-01-30

申请号：US16496760

申请日：2018-02-13

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Daizo Jito ,  Takeshi Ogasawara ,  Akihiro Kawakita ,  Motoharu Saito

IPC: H01M4/525 ,  H01M4/36

Abstract: A positive electrode active material for a non-aqueous-electrolyte secondary battery contains a nickel-containing lithium transition metal oxide and is a primary particle alone of a lithium transition metal oxide that contains nickel in an amount of 80 mol % or more relative to the whole molar quantity of a metal element other than lithium or a secondary particle formed by aggregation of two to five particles. A rare earth compound and a magnesium compound adhere to the surface of the primary particle alone or the secondary particle.