公开(公告)号：US11098201B2

公开(公告)日：2021-08-24

申请号：US16327265

申请日：2017-08-08

Applicant: DENKA COMPANY LIMITED

Inventor： Tatsuya Nagai ,  Shinichiro Osumi ,  Daiki Ikeda ,  Tetsuya Ito ,  Hiroshi Yokota

IPC: C09C1/54 ,  H01B1/04 ,  H01M4/62 ,  C09C1/00 ,  H01B1/24 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/13 ,  H01M10/052

Abstract: An object of the present invention is to provide a carbon black for batteries having excellent dispersibility, electron conductivity and oxidation resistance. In addition, an object of the present invention is to provide a low-viscosity conductive composition for an electrode produced using the carbon black, and a low-resistance battery electrode and a battery having excellent high-output characteristics and cycle characteristics produced using the conductive composition.
A carbon black for batteries having: BET specific surface area of 50 to 220 m2/g; a crystallite diameter (La) of 30 to 42 Å; and a number of CO2 desorption molecules per unit surface area measured by a temperature-rising desorption gas analysis method (50° C. to 1200° C. of measurement temperature) of 8.0×1016 to 15.0×1016 molecules/m2 is excellent in dispersibility, electron conductivity and oxidation resistance. A conductive composition for a low-viscosity electrode produced using the carbon black, and a low-resistance battery electrode and a battery having excellent high-output characteristics and cycle characteristics produced using the conductive composition can be obtained.

公开(公告)号：US11658278B2

公开(公告)日：2023-05-23

申请号：US16822284

申请日：2020-03-18

Applicant: Denka Company Limited ,  CENTRAL GLASS COMPANY, LIMITED

Inventor： Shinichiro Osumi ,  Tatsuya Nagai ,  Takako Arai ,  Tetsuya Ito ,  Hiroyuki Oomori ,  Shoi Suzuki ,  Akifumi Yao

IPC: C09C1/56 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/62 ,  H01M4/02

CPC classification number: H01M4/0416 ,  C09C1/56 ,  H01M4/1393 ,  H01M4/622 ,  H01M2004/028

Abstract: To provide a carbon black for batteries capable of readily obtaining a positive electrode for batteries having excellent adhesiveness, and excellent output characteristics and the cycle characteristics. A carbon black for batteries, the carbon black having a BET specific surface area measured according to JIS K6217-2 C method of 100 m2/g or larger, and a surface fluorine concentration X (unit: atom %) and a surface oxygen concentration Y (unit: atom %) measured by X-ray Photoelectron Spectroscopy (XPS) satisfying the following conditions (A) and (B),

0.3≤X≤4.0 and  (A)

0.1≤Y≤3.0.  (B)

公开(公告)号：US12176515B2

公开(公告)日：2024-12-24

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 ,  H01M4/02

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：US12132204B2

公开(公告)日：2024-10-29

申请号：US17295235

申请日：2019-11-28

Applicant: Denka Company Limited

Inventor： Tatsuya Nagai ,  Shinichiro Osumi ,  Tetsuya Ito

IPC: H01M4/58 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

CPC classification number: H01M4/58 ,  H01M4/625 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2300/0028

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：US20190177551A1

公开(公告)日：2019-06-13

申请号：US16327265

申请日：2017-08-08

Applicant: DENKA COMPANY LIMITED

Inventor： Tatsuya Nagai ,  Shinichiro Osumi ,  Daiki Ikeda ,  Tetsuya Ito ,  Hiroshi Yokota

IPC: C09C1/54 ,  H01M4/1393 ,  H01M4/133 ,  H01B1/24

Abstract: An object of the present invention is to provide a carbon black for batteries having excellent dispersibility, electron conductivity and oxidation resistance. In addition, an object of the present invention is to provide a low-viscosity conductive composition for an electrode produced using the carbon black, and a low-resistance battery electrode and a battery having excellent high-output characteristics and cycle characteristics produced using the conductive composition.A carbon black for batteries having: BET specific surface area of 50 to 220 m2/g; a crystallite diameter (La) of 30 to 42 Å; and a number of CO2 desorption molecules per unit surface area measured by a temperature-rising desorption gas analysis method (50° C. to 1200° C. of measurement temperature) of 8.0×1016 to 15.0×1016 molecules/m2 is excellent in dispersibility, electron conductivity and oxidation resistance. A conductive composition for a low-viscosity electrode produced using the carbon black, and a low-resistance battery electrode and a battery having excellent high-output characteristics and cycle characteristics produced using the conductive composition can be obtained.