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：US20200227721A1

公开(公告)日：2020-07-16

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: H01M4/04 ,  H01M4/62 ,  H01M4/1393

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：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：US20230335736A1

公开(公告)日：2023-10-19

申请号：US18044624

申请日：2021-09-09

Applicant: Denka Company Limited

Inventor： Shinichiro OSUMI ,  Yutaka TAKEUCHI ,  Ayumu TSUKAMOTO

IPC: H01M4/587 ,  C01B32/05 ,  C01B32/00

CPC classification number: H01M4/587 ,  C01B32/05 ,  C01B32/00 ,  C01P2006/17 ,  C01P2006/12 ,  C01P2004/03 ,  C01P2004/04

Abstract: A porous carbon material having a first peak positioned in a pore diameter range of 3 nm or larger and smaller than 10 nm and a second peak positioned in a pore diameter range of 10 nm or larger and 10 μm or smaller in a pore size distribution measured by a mercury intrusion method.

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.