Denka Company Limited

Central Glass Company, Limited

Jiangxi University of Science and Technology

Shinichiro Osumi

Tatsuya Nagai

Tetsuya Ito

Hiroshi Yokota

Akifumi Yao

Hiroyuki Oomori

Shoi Suzuki

Daiki Ikeda

Takako Arai

Sheng Wen Zhong

Jun Chen

Qian Zhang

Min Zeng

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 m/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 m/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.

Positive electrode composition for lithium ion secondary battery, positive electrode for lithium ion secondary battery, and lithium ion secondary battery

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 m/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.

Positive electrode composition for lithium ion secondary batteries, positive electrode for lithium ion secondary batteries, and lithium ion secondary battery

A composition for a positive electrode of a lithium ion secondary battery, the composition comprising:

Composition for lithium ion secondary battery positive electrode, lithium ion secondary battery positive electrode, and lithium ion secondary battery

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 m/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&#x2264;&#x2264;4.0 and&#x2003;&#x2003;(A)0.1&#x2264;&#x2264;3.0.&#x2003;&#x2003;(B)

Carbon black for batteries, coating liquid for batteries, positive electrode for nonaqueous batteries and nonaqueous battery

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 m/g; a crystallite diameter (La) of 30 to 42 &#x212b;; and a number of COdesorption molecules per unit surface area measured by a temperature-rising desorption gas analysis method (50&#xb0; C. to 1200&#xb0; C. of measurement temperature) of 8.0&#xd7;10to 15.0&#xd7;10molecules/mis 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.

Carbon black for batteries, conductive composition for electrodes, electrode for batteries, and battery

Growing community of inventors

Machida, Japan

Shinichiro Osumi