公开(公告)号：US20230197948A1

公开(公告)日：2023-06-22

申请号：US17926419

申请日：2021-04-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takaya Tochio ,  Katsuya Inoue ,  Takeshi Ogasawara ,  Yoshinori Aoki

IPC: H01M4/525 ,  H01M4/485 ,  H01M4/505 ,  H01M10/052

CPC classification number: H01M4/525 ,  H01M4/485 ,  H01M4/505 ,  H01M10/052 ,  H01M2004/028

Abstract: A positive electrode active material contains a lithium transition metal composite oxide that contains 85% by mole or more of Ni relative to the total number of moles of metal elements excluding Li and at least one metal element M1 that is selected from among Mg, Ti, Nb, Zr and V in an amount of 3% by mole or less relative to the total number of moles of metal elements excluding Li. The ratio of the concentration of metal element M1 contained in the shell of each primary particle of the composite oxide to the concentration of metal element M1 contained in the core is from 1.01 to 20; and at least one metal element M2 of Ca and Sr is on the surface of each primary particle in an amount of 1% by mole or less relative to the total number of moles of metal elements excluding Li.

公开(公告)号：US20220393165A1

公开(公告)日：2022-12-08

申请号：US17764004

申请日：2020-07-28

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takaya Tochio ,  Katsuya Inoue ,  Takeshi Ogasawara

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/04

Abstract: This positive electrode has a positive electrode collector and a positive electrode mixture layer formed on the surface of the positive electrode collector. The positive electrode mixture layer contains a lithium transition metal composite oxide containing 85 mol % or more of Ni and 1-15 mol % inclusive of Al relative to the total number of moles of metal elements other than Li, and in which the total amount of Ni, Al, and Mn contained is 99.9 mol % or more. The density of the positive electrode active material in the positive electrode mixture layer is 3.45 g/cm3 or higher. In an observation of a cross-section of the positive electrode using a scanning electron microscope, the proportion of the cross-section area of the lithium transition metal composite oxide devoid of cracks relative to the cross-section area of the lithium transition metal composite oxide exposed on the cross-section is 51% or higher.

公开(公告)号：US11362320B2

公开(公告)日：2022-06-14

申请号：US16630917

申请日：2018-07-10

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takaya Tochio ,  Takeshi Ogasawara

IPC: H01M4/131 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/02

Abstract: A positive electrode active material which predominantly includes lithium transition metal composite oxide particles containing Ni and Al, and which has a low charge transfer resistance and thus allows the battery capacity to be increased. The composite oxide particles contain 5 mol % or more Al relative to the total molar amount of metal elements except Li, include a particle core portion and an Al rich region on or near the surface of the composite oxide particle wherein the Al concentration in the particle core portion is not less than 3 mol % and the Al concentration in the Al rich region is 1.3 times or more greater than the Al concentration in the particle core portion. The composite oxide particles contain 0.04 mol % or more sulfate ions relative to the total molar amount of the particles.

公开(公告)号：US12237505B2

公开(公告)日：2025-02-25

申请号：US16086225

申请日：2017-01-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Koh Masahara ,  Kaoru Nagata ,  Takaya Tochio ,  Taizou Sunano ,  Akihiro Kawakita ,  Takeshi Ogasawara

IPC: H01M4/00 ,  C01G53/42 ,  H01M4/36 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

Abstract: This positive electrode active material for non-aqueous electrolyte secondary batteries comprises: lithium transition metal oxide particles; a metal compound which contains a metal element M and adheres to the surfaces of the lithium transition metal oxide particles; and a lithium metal compound which contains lithium (Li) and the metal element M and adheres to the surfaces of the lithium transition metal oxide particles. In this connection, the metal element M is composed of at least one substance that is selected from among aluminum (Al), titanium (Ti), manganese (Mn), gallium (Ga), molybdenum (Mo), tin (Sn), tungsten (W) and bismuth (Bi).

公开(公告)号：US20230216046A1

公开(公告)日：2023-07-06

申请号：US18111204

申请日：2023-02-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takaya Tochio ,  Toshinobu Kanai ,  Takeshi Ogasawara

IPC: H01M4/505 ,  H01M4/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M50/409

CPC classification number: H01M4/505 ,  H01M4/0471 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M50/409 ,  H01M2300/0028

Abstract: The method for manufacturing a positive electrode active material for a non-aqueous electrolyte secondary battery according to one embodiment of the present invention comprises: a first step for adding an alkaline solution having a tungsten compound dissolved therein to a lithium-metal composite oxide powder represented by general formula LizNi1-x-yCoxMyO2 (where 0≤x≤0.1, 0≤y≤0.1, and 0.97≤z≤1.20 are satisfied, and M is at least one type of element selected from among Mn, W, Mg, Mo, Nb, Ti, Si, and Al), and mixing same; and a second step for heating the mixture of the alkaline solution and the lithium-metal composite oxide powder at 100-600° C., wherein the amount of the alkaline solution to be added in the first step is 0.1-10 mass % with respect to the amount of the lithium-metal composite oxide powder.

公开(公告)号：US20230187629A1

公开(公告)日：2023-06-15

申请号：US17926448

申请日：2021-04-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Tomoo Takayama ,  Takaya Tochio ,  Katsuya Inoue ,  Takeshi Ogasawara

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/36 ,  H01M4/505

CPC classification number: H01M4/525 ,  C01G53/66 ,  H01M4/366 ,  H01M4/505 ,  C01P2006/40 ,  C01P2002/52 ,  C01P2004/50 ,  C01P2004/84 ,  C01P2002/74 ,  H01M2004/028

Abstract: This positive electrode material comprises a lithium transition metal complex oxide which contains at least 80 mol % Ni in terms of the total mol number of metal elements excluding Li, and which has a total Co content of less than 5 mol %. The lithium transition metal complex oxide is formed as secondary particles obtained by aggregating primary particles, wherein at least one element A selected from Ca and Sr is present on the surface of the primary particles in the amount of 0.01-1 mol %, inclusive, in terms of the total mol number of the metal elements excluding Li. In addition, at least one element B selected from B, Zr, W, Al, Nb, Mo, and Ti is present on the surface of the secondary particles in the amount of 0.05-2 mol %, inclusive, in terms of the total mol number of the Ni in the complex oxide.

公开(公告)号：US11616227B2

公开(公告)日：2023-03-28

申请号：US16957180

申请日：2018-12-12

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takaya Tochio ,  Toshinobu Kanai ,  Takeshi Ogasawara

IPC: H01M4/505 ,  H01M4/04 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0569 ,  H01M50/409

Abstract: The method for manufacturing a positive electrode active material for a non-aqueous electrolyte secondary battery according to one embodiment of the present invention comprises: a first step for adding an alkaline solution having a tungsten compound dissolved therein to a lithium-metal composite oxide powder represented by general formula LizNi1-x-yCoxMyO2 (where 0≤x≤0.1, 0≤y≤0.1, and 0.97≤z≤1.20 are satisfied, and M is at least one type of element selected from among Mn, W, Mg, Mo, Nb, Ti, Si, and Al), and mixing same; and a second step for heating the mixture of the alkaline solution and the lithium-metal composite oxide powder at 100-600° C., wherein the amount of the alkaline solution to be added in the first step is 0.1-10 mass % with respect to the amount of the lithium-metal composite oxide powder.

公开(公告)号：US20200235377A1

公开(公告)日：2020-07-23

申请号：US16630917

申请日：2018-07-10

Applicant: Panasonic Intellectual Property Management CO., Ltd.

Inventor： Takaya Tochio ,  Takeshi Ogasawara

IPC: H01M4/131 ,  H01M4/04 ,  H01M10/0525

Abstract: A positive electrode active material which predominantly includes lithium transition metal composite oxide particles containing Ni and Al, and which has a low charge transfer resistance and thus allows the battery capacity to be increased. The composite oxide particles contain 5 mol % or more Al relative to the total molar amount of metal elements except Li, include a particle core portion and an Al rich region on or near the surface of the composite oxide particle wherein the Al concentration in the particle core portion is not less than 3 mol % and the Al concentration in the Al rich region is 1.3 times or more greater than the Al concentration in the particle core portion. The composite oxide particles contain 0.04 mol % or more sulfate ions relative to the total molar amount of the particles.

公开(公告)号：US20200099050A1

公开(公告)日：2020-03-26

申请号：US16472512

申请日：2017-12-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takaya Tochio ,  Kaoru Nagata ,  Takeshi Ogasawara

IPC: H01M4/525 ,  H01M4/131 ,  H01M4/62 ,  H01M10/0525

Abstract: A positive electrode for a non-aqueous electrolyte secondary battery contains a first particle and a second particle. The first particle is an electrochemically active positive-electrode active material, and the positive-electrode active material contains a lithium transition metal oxide. The second particle is an electrochemically inactive metal oxide and has a BET specific surface area in the range of 10 to 100 m2/g and a sphericity of 0.8 or more.

公开(公告)号：US20190386299A1

公开(公告)日：2019-12-19

申请号：US16471950

申请日：2017-12-14

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takaya Tochio ,  Kaoru Nagata ,  Takeshi Ogasawara

IPC: H01M4/36 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/131

Abstract: A positive electrode for a non-aqueous electrolyte secondary battery contains a first particle and a second particle. The first particle contains an electrochemically active positive-electrode active material, and the positive-electrode active material contains a lithium transition metal oxide. The second particle contains an electrochemically inactive metal oxide. An electrochemically inactive phosphate adheres to the surface of the second particle.