Nippon Oil Corporation

Nippon Petroleum Refining Company, Limited

Power Carbon Technology Co., Ltd.

Keizou Ikai

Hideki Ono

Takashi Oyama

Tamotsu Tano

Masaki Fujii

Kiwamu Takeshita

Ippei Fujinaga

Kazuhisa Nakanishi

Akio Sakamoto

Hiromitsu Hashisaka

Keiji Higashi

Toshitaka Fujii

Takashi Noro

Masatoshi Nishida

Shiro Nakamo

There are disclosed activated carbon for use in an electric double-layer capacitor electrode, the carbon being capable of improving rate characteristics and float characteristics of the electric double-layer capacitor electrode, and a method for manufacturing the activated carbon. The method for manufacturing the activated carbon for use in the electric double-layer capacitor electrode, comprising the steps of: grinding a carbon raw material to adjust an average particle diameter of the carbon raw material into a range of 1 &#x3bc;m to 15 &#x3bc;m; mixing the carbon raw material whose average particle diameter has been adjusted, with an alkali activator to obtain a mixture; and an activation treatment comprising heating the mixture under an atmosphere of an inert gas and then under an atmosphere of a mixed gas of the inert gas and water vapor.

Activated carbon for an electric double-layer capacitor electrode and manufacturing method for same

The present invention provides a raw coke having such a structure that the graphitized product resulting from graphitization of the raw coke at a temperature of 2800&#xb0; C. under an inactive gas atmosphere will have ratios of the crystallite size to the lattice constant of 360 or less in the (002) plane and 1500 or less in the (110) plane, as a raw coke providing active carbon produced by alkali-activating the raw coke, which is reduced in remaining alkali content and can simplify washing operation because washing liquid can easily pass through the activated carbon, or as a raw coke for the production of needle coke.

Raw coke for electricity storage carbon material and needle coke

The present invention provides a raw material carbon composition that is converted to a carbon material for an electrode in an electric double layer capacitor that can develop a high level of electrostatic capacity with good reproducibility without producing any synthetic pitch. The raw material carbon composition is converted to a carbon material for an electrode in an electric double layer capacitor upon activation treatment and is characterized in that, when the raw material carbon composition is carbonized in an inert gas atmosphere at a temperature of 1000 to 1500&#xb0; C., the true relative density (RD) and the total hydrogen content (TH %) in the carbonized material obtained after the burning satisfy the following formula (1):RD=&#x2212;0.75TH %+intercept&#x2003;&#x2003;(1)wherein the intercept is 2.160 or greater.

Raw material carbon composition for carbon material for electrode in electric double layer capacitor

Growing community of inventors

Kawasaki, Japan

Keizou Ikai