公开(公告)号：US20240300825A1

公开(公告)日：2024-09-12

申请号：US18280663

申请日：2022-02-22

Applicant: Proterial, Ltd.

Inventor： Shuichi Takano ,  Hisato Tokoro ,  Akira GUNJI ,  Shin Takahashi

IPC: C01G53/00 ,  H01M10/0525

CPC classification number: C01G53/50 ,  H01M10/0525 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/40

Abstract: A method for manufacturing a positive electrode active material for a lithium ion secondary battery involves reacting at least 95 mass % of a lithium compound through a heat treatment step using a rotary firing furnace and having a batch firing process for heating a precursor while rolling the same in a heating region in a furnace tube, wherein the batch firing process has: a tilted input stage for tilting the furnace tube and inputting the precursor from an inlet of the firing furnace; a horizontal firing stage for performing firing while making the furnace tube horizontal; and a tilted discharge stage for tilting the furnace tube and discharging a fired powder from an outlet of the firing furnace.

公开(公告)号：US11764356B2

公开(公告)日：2023-09-19

申请号：US17374210

申请日：2021-07-13

Applicant: Proterial, Ltd.

Inventor： Hisato Tokoro ,  Takashi Nakabayashi ,  Shuichi Takano ,  Akira Gunji ,  Tatsuya Tooyama ,  Shin Takahashi

IPC: H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  C01G53/00 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/505 ,  C01G53/50 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  C01P2002/77 ,  H01M2004/028

Abstract: Making a positive electrode active material for lithium ion secondary batteries includes: weighting and mixing lithium carbonate and a compound containing respective metallic elements other than Li in a composition formula LiαNixCoyM21-x-y-zM2zO2+β so as to have a metallic constituent ratio of the formula to obtain a mixture, and firing the mixture to obtain a lithium composite compound. Performing, on the mixture, a first heat treatment at 200° C. to 400° C. for 0.5 to 5 hours to obtain a first precursor. A step of performing a heat treatment on the first precursor under an oxidizing atmosphere at 450° C. to 800° C. for 0.5 to 50 hours, and reacting 92 mass % or more of the lithium carbonate to obtain a second precursor, and a finishing step of performing a heat treatment on the second precursor under an oxidizing atmosphere at 755° C. to 900° C. for 0.5 to 50 hours to obtain the lithium composite compound.

公开(公告)号：US20230282819A1

公开(公告)日：2023-09-07

申请号：US18014744

申请日：2021-07-07

Applicant: Proterial, Ltd.

Inventor： Hisato Tokoro ,  Shuichi Takano ,  Takashi Nakabayashi ,  Shin Takahashi

IPC: H01M4/505 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/131 ,  C01G53/00

CPC classification number: H01M4/505 ,  H01M10/0525 ,  H01M4/525 ,  H01M4/131 ,  C01G53/50 ,  H01M2004/028

Abstract: A positive electrode active material for a lithium ion secondary battery, the positive electrode active material having high capacity and exceptional coatability due to comprising both an oil absorption amount and powder physical properties suitable therefor. This positive electrode active material for a lithium ion secondary battery comprises a lithium transition metal composite oxide powder represented by compositional formula (1), having primary particles and secondary particles in which the primary particles are aggregated. In the positive electrode active material for a lithium ion secondary battery, the oil absorption amount, based on JIS K5101-13-1, of NMP (N-methyl-2-pyrrolidone) per 100 g of the lithium transition metal composite oxide powder is 19-30 mL/100 g, and the sphericity represented by the ratio AB of the short axis A and the long axis B of the secondary particles measured from an SEM image is 0.88≤A/B≤1.0. Compositional formula (1): Li1+aNibCocMdXeO2+α

公开(公告)号：US20240317605A1

公开(公告)日：2024-09-26

申请号：US18577997

申请日：2022-09-08

Applicant: Proterial, Ltd.

Inventor： Takashi Nakabayashi ,  Shuichi Takano ,  Hisato Tokoro

IPC: C01G53/00 ,  H01M10/0525

CPC classification number: C01G53/50 ,  H01M10/0525 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/16 ,  C01P2006/19 ,  C01P2006/40

Abstract: Provided is a positive electrode active material for a lithium ion secondary battery which combines high capacity with favorable charging/discharging cycle characteristics. In this positive electrode active material for a lithium ion secondary battery, the average value of the particle diameters of the primary particles evaluated with a scanning electron microscope is 50-550 nm, and the R value is greater than 0.420 but less than or equal to 0.460, the R value being calculated by formula (2) as follows: (2) R value=(I006+I102)/I101 on the basis of the intensity I006 calculated from the height of a peak identified as the 006-plane of an α-NaFeO2 type layered structure in X-ray powder diffraction measurement, the intensity I102 calculated from the height of a peak identified as the 102-plane, and the intensity I101 calculated from the height of a peak identified as the 101-plane.

公开(公告)号：US20240158260A1

公开(公告)日：2024-05-16

申请号：US18280946

申请日：2022-03-17

Applicant: Proterial, Ltd.

Inventor： Takashi Nakabayashi ,  Hisato Tokoro ,  Shuichi Takano

IPC: C01G53/00 ,  H01M4/04 ,  H01M4/505 ,  H01M4/525

CPC classification number: C01G53/50 ,  H01M4/0471 ,  H01M4/505 ,  H01M4/525 ,  C01P2002/52 ,  C01P2002/72 ,  C01P2004/03 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/40

Abstract: A method for manufacturing a positive electrode active material for a lithium-ion secondary battery, the method including: a step for firing mixed powder in which metal nickel powder, a compound containing Li, and a compound containing a metal element M other than Li and Ni are mixed to yield a positive electrode active material for a lithium-ion secondary battery, the positive electrode active material having a layered structure, wherein the amount of Ni in the total amount of metal elements contained in the positive electrode active material for a lithium-ion secondary battery is equal to or greater than 60% in terms of the atomic ratio, and the nickel powder is at least partially oxidized or a step for oxidizing said powder is included.

公开(公告)号：US11949100B2

公开(公告)日：2024-04-02

申请号：US16978271

申请日：2019-03-04

Applicant: Proterial, Ltd.

Inventor： Tatsuya Toyama ,  Shin Takahashi ,  Hisato Tokoro ,  Genei Nakajima ,  Shuichi Takano ,  Akira Gunji ,  Akihiko Noie

IPC: H01M4/505 ,  C01G53/00 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/505 ,  C01G53/50 ,  H01M4/525 ,  H01M10/0525 ,  C01P2002/52 ,  C01P2002/74 ,  C01P2002/78 ,  C01P2006/12 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

Abstract: The present invention is to provide a cathode active material used for a lithium ion secondary battery which has a large charge-discharge capacity, and excels in charge-discharge cycle properties, output properties and productivity, and, a lithium ion secondary battery using the same. The cathode active material used for a lithium ion secondary battery comprises a lithium transition metal composite oxide represented by the following Formula (1); Li1+aNibCocMndMeO2+α, where, in the formula (1), M is at least one metal element other than Li, Ni, Co, and Mn; and a, b, c, d, e, and α satisfy the following conditions: −0.04≤a≤0.04, 0.80≤b

公开(公告)号：US11688847B2

公开(公告)日：2023-06-27

申请号：US16645350

申请日：2018-11-21

Applicant: Proterial, Ltd.

Inventor： Akira Gunji ,  Tatsuya Toyama ,  Akio Takeuchi ,  Hisato Tokoro ,  Shuichi Takano ,  Genei Nakajima

IPC: H01M4/04 ,  H01M4/131 ,  H01M4/134 ,  H01M10/0525 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/525

CPC classification number: H01M4/0471 ,  H01M4/131 ,  H01M4/134 ,  H01M4/1391 ,  H01M4/1395 ,  H01M4/364 ,  H01M4/525 ,  H01M10/0525

Abstract: A method for manufacturing a cathode active material for a lithium ion secondary battery comprises mixing lithium carbonate and a compound containing a metal element other than Li, and a firing step. The firing step includes at last two stages of controlling firing to different temperatures. The at least two stages include controlling a firing temperature to a lower temperature and controlling a firing temperature to a higher temperature. The firing is controlled is such that the former stage has a lower oxygen concentration in an atmosphere than the latter stage. The firing apparatus comprises at least two firing furnaces of controlling firing temperatures to different temperatures. The at least two firing furnaces include controlling a firing temperature to a lower temperature and controlling firing temperature to a higher temperature. The latter firing furnace has a gas outlet being in communication with the former firing furnace.

公开(公告)号：US11677075B2

公开(公告)日：2023-06-13

申请号：US16644114

申请日：2018-12-26

Applicant: Proterial, Ltd.

Inventor： Shuichi Takano ,  Akira Gunji ,  Hisato Tokoro ,  Genei Nakajima ,  Tatsuya Toyama ,  Shin Takahashi

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  C01G53/00 ,  H01M4/02 ,  H01M4/131 ,  H01M10/052

CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/505 ,  H01M10/0525 ,  C01G53/42 ,  C01P2002/52 ,  C01P2002/54 ,  C01P2004/03 ,  C01P2004/45 ,  C01P2004/50 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/12 ,  C01P2006/14 ,  C01P2006/16 ,  C01P2006/40 ,  H01M4/131 ,  H01M10/052 ,  H01M2004/021 ,  H01M2004/028 ,  Y02E60/10

Abstract: Provided is a cathode active material for a lithium ion secondary battery in which the secondary particles constituting the powder have a high breaking strength and a good coatability, and a method for manufacturing same. The cathode active material for a lithium ion secondary battery includes a primary particle of a lithium composite compound; and secondary particles formed by an aggregation of primary particles, wherein a ratio between an average particle size of the primary particles and an average particle size of the secondary particles is 0.006 or more and 0.25 or less, an amount of lithium carbonate is 0.4% by mass or less, and a breaking strength of the secondary particles is 30 MPa or more.