公开(公告)号：US20240076503A1

公开(公告)日：2024-03-07

申请号：US18262512

申请日：2022-01-21

Applicant: Denka Company Limited

Inventor： Tetsuya ITO ,  Yusaku HARADA ,  Kosuke TANAKA ,  Tatsuya NAGAI

IPC: C09C1/54 ,  C09C1/56

CPC classification number: C09C1/54 ,  C09C1/56 ,  C01P2006/12 ,  C01P2006/42

Abstract: Carbon black in which an oil absorption amount is 150 mL/100 g or more and 400 mL/100 g or less and a cobalt content that is measured by induced coupled plasma-mass spectrometry is 20 ppb or less.

公开(公告)号：US20220200006A1

公开(公告)日：2022-06-23

申请号：US17605814

申请日：2020-04-17

Applicant: DENKA COMPANY LIMITED

Inventor： Akira YODA ,  Tatsuya NAGAI ,  Tetsuya ITO

IPC: H01M4/62 ,  C09C1/56 ,  H01M4/525 ,  H01M4/505 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/1391

Abstract: A slurry including at least a carbon black and a dispersion medium, wherein a concentration of the carbon black in the slurry is 5% by mass or more and 25% by mass or less, and wherein in a volume-based frequency distribution of particle size of the carbon black measured by a laser diffraction/scattering method, provided that a volume concentration of carbon black with a particle size of 0.6 μm or more is x (%), a volume concentration of carbon black with a particle size of 0.3 μm or more and less than 0.6 μm is y (%), and a volume concentration of carbon black having a particle size of less than 0.3 μm is 100−(x+y) (%), the slurry satisfies 10≤x≤70, 30≤y≤90, and 0≤100−(x+y)≤30.

公开(公告)号：US20220013777A1

公开(公告)日：2022-01-13

申请号：US17295235

申请日：2019-11-28

Applicant: Denka Company Limited

Inventor： Tatsuya NAGAI ,  Shinichiro OSUMI ,  Tetsuya ITO

IPC: H01M4/58 ,  H01M10/0525 ,  H01M4/62

Abstract: A composition for a positive electrode of a lithium ion secondary battery, the composition comprising:
an active material capable of storing and extracting lithium ion; and
an electric conductive material,
wherein the active material is lithium iron phosphate,
wherein the conductive material includes carbon black and carbon nanotube,
wherein the carbon black has an average primary particle diameter of 39 nm or less, and
wherein the carbon nanotube has an average diameter of 20 nm or less.

公开(公告)号：US20190248944A1

公开(公告)日：2019-08-15

申请号：US16320646

申请日：2017-07-14

Applicant: Denka Company Limited

Inventor： Tatsuya NAGAI ,  Takuya NARUTOMI ,  Tetsuya ITO ,  Hiroshi YOKOTA

IPC: C08F261/04 ,  H01M4/62 ,  H01M4/505 ,  H01M4/1391 ,  H01M4/525 ,  H01M10/0525 ,  C08L27/16 ,  C08K3/04 ,  C08F20/44

CPC classification number: C08F261/04 ,  C08F20/44 ,  C08K3/04 ,  C08K2201/001 ,  C08L27/16 ,  C08L2203/20 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M4/62 ,  H01M4/623 ,  H01M4/625 ,  H01M10/0525

Abstract: [Problem]To provide a conductive resin composition for electrodes which is excellent in dispersibility and oxidation resistance. To provide: an electrode composition employing the conductive resin composition for electrodes and having a low viscosity; an electrode employing the electrode composition and having a low electrode plate resistance; and a lithium ion battery having a high energy density, high output characteristics and a high cyclability.[Solution]A conductive resin composition for electrodes, comprising a dispersant, a conductive agent, and a binding material, wherein: the dispersant comprises a graft copolymer in which a monomer containing acrylonitrile as a main component is grafted onto polyvinyl alcohol; the average degree of polymerization of the polyvinyl alcohol is 300 to 3,000 and the degree of saponification of the same is 90 mol % to 100 mol %; and the polyvinyl alcohol content and the polyacrylonitrile content in the graft copolymer are, respectively, 10 mass % to 40 mass % and 90 mass % to 60 mass %.

公开(公告)号：US20200313159A1

公开(公告)日：2020-10-01

申请号：US16754736

申请日：2018-09-28

Applicant: Denka Company Limited ,  Jiangxi University of Science and Technology

Inventor： Shinichiro OSUMI ,  Tatsuya NAGAI ,  Tetsuya ITO ,  Sheng Wen ZHONG ,  Jun CHEN ,  Qian ZHANG ,  Min ZENG

IPC: H01M4/131 ,  H01M4/485 ,  H01M4/62 ,  H01M10/0525

Abstract: According to various aspects of the present invention, a positive electrode composition for a lithium-ion secondary battery includes an active material capable of inserting and extracting lithium ions, and a conductor, wherein the active material is a lithium-nickel-cobalt-manganese complex oxide; the conductor is a carbon black and carbon nanotubes; the carbon black has a BET specific surface area of 100 to 400 m2/g, and a DBP absorption of 210 to 380 ml/100 g; and the carbon nanotubes have an average diameter of 7 to 15 nm.

公开(公告)号：US20240079598A1

公开(公告)日：2024-03-07

申请号：US18262499

申请日：2022-01-21

Applicant: Denka Company Limited

Inventor： Tetsuya ITO ,  Yusaku HARADA ,  Kosuke TANAKA ,  Tatsuya NAGAI

IPC: H01M4/62 ,  C09C1/54 ,  C09C1/56

CPC classification number: H01M4/625 ,  C09C1/54 ,  C09C1/56 ,  C01P2006/12 ,  C01P2006/19 ,  C01P2006/40 ,  C01P2006/80

Abstract: Carbon black in which an oil absorption amount is 150 mL/100 g or more and 400 mL/100 g or less and an iron content that is measured by induced coupled plasma-mass spectrometry is 500 ppb or less.

公开(公告)号：US20210119206A1

公开(公告)日：2021-04-22

申请号：US17047384

申请日：2019-04-26

Applicant: Denka Company Limited

Inventor： Tatsuya NAGAI ,  Shinichiro OSUMI ,  Tetsuya ITO

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/131

Abstract: A positive electrode composition for a lithium ion secondary battery includes an active material that can occlude and release lithium ions and a conductive material, wherein the active material is a lithium cobalt composite oxide; the conductive material is carbon black and carbon nanotubes; the carbon black has a BET specific surface area of 100 to 400 m2/g and a DBP absorption amount of 210 to 400 ml/100 g; the carbon nanotubes have an average diameter of 20 nm or less, a BET specific surface area of 170 m2/g or more, and an aspect ratio of 50 or more; and a carbon black content X (unit: % by mass) and a carbon nanotube content Y (unit: % by mass) in the positive electrode composition satisfy the following conditions (A) and (B): (A) 0.5≤(X+Y)≤2.0; (B) 0.80≤{X/(X+Y)}≤0.95.

公开(公告)号：US20250132346A1

公开(公告)日：2025-04-24

申请号：US18685605

申请日：2022-08-16

Applicant: Denka Company Limited

Inventor： Tatsuya NAGAI ,  Yuma KITAE ,  Tetsuya ITO

IPC: H01M4/62 ,  H01M4/02 ,  H01M4/04

Abstract: A method for producing a positive electrode composition, the method including: a first step of mixing a first agent containing a binding material and a first liquid medium, a second agent containing carbon black and a second liquid medium, and a third agent containing carbon nanotubes and a third liquid medium to obtain a mixed solution; and a second step of mixing the mixed solution and an active material to obtain a positive electrode composition.

公开(公告)号：US20240290971A1

公开(公告)日：2024-08-29

申请号：US18572178

申请日：2022-06-14

Applicant: Denka Company Limited

Inventor： Tatsuya NAGAI ,  Yuma KITAE ,  Tetsuya ITO

IPC: H01M4/583 ,  H01M4/02

CPC classification number: H01M4/583 ,  H01M2004/021 ,  H01M2004/028

Abstract: A positive electrode composition containing carbon black, carbon nanotubes, an active material, and a binding material, in which the carbon black has a BET specific surface area of 100 to 400 m2/g and a crystallite size (Lc) of 15 to 26 Å, the carbon nanotubes have an average diameter of 5 to 15 nm, and a ratio (average diameter/BET specific surface area) of the average diameter with respect to a BET specific surface area of the carbon nanotubes is 0.01 to 0.068 nm/(m2/g).

公开(公告)号：US20240076502A1

公开(公告)日：2024-03-07

申请号：US18262507

申请日：2022-01-21

Applicant: Denka Company Limited

Inventor： Tetsuya ITO ,  Yusaku HARADA ,  Kosuke TANAKA ,  Tatsuya NAGAI

IPC: C09C1/54 ,  C09C1/56

CPC classification number: C09C1/54 ,  C09C1/56 ,  C01P2006/12 ,  C01P2006/42

Abstract: Carbon black in which an oil absorption amount is 150 mL/100 g or more and 400 mL/100 g or less and a nickel content that is measured by induced coupled plasma-mass spectrometry is 50 ppb or less.