Kuraray Co., Ltd.

Kuraray Chemical Co., Ltd.

Honda Giken Kogyo Kabushiki Kaisha

Other

Ricoh Company, Ltd.

Honda Motor Co., Ltd.

Kashima Oil Co., Ltd.

Kurarayco., Ltd.

Shushi Nishimura

Yumika Nishita

Takeshi Fujino

Kiyoto Otsuka

Yoshifumi Egawa

Hiroyuki Nishinami

Hideharu Iwasaki

Shigeki Oyama

Nozomu Sugo

Yuji Kawabuchi

Teruhiro Okada

Masaki Fukuura

Toshiyuki Kabata

Minoru Noguchi

Toshiyuki Ohsawa

Kenji Sato

Mitsunori Hitomi

Naohiko Oki

Takayuki Yoshikawa

Takashi Maeda

Kengo Tachikawa

Takanori Kitamura

Akimi Ogawa

Kiyoto Ohtsuka

Yoshihisa Inui

Mao Takayama

Shohichi Takamoto

Hajime Aoki

Takahiro Haga

Tsuyoshi Kowaka

Tatsuo Morotomi

Yumika Ninomiya

The present invention relates to a carbonaceous material having a BET specific surface area of 1550 to 2500 m/g and a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.04 mg/m.

Carbonaceous material, method for producing same, electrode active material for electrochemical device, electrode for electrochemical device, and electrochemical device

An object of the present invention is to provide a carbonaceous material from which an electrochemical device having a high initial electrostatic capacitance, an excellent effect of suppressing gas generation during charging and discharging, and excellent durability can be obtained, and a method for producing the carbonaceous material, an electrode active material for an electrochemical device containing the carbonaceous material, an electrode for an electrochemical device containing the electrode active material, and an electrochemical device. The present invention relates to a carbonaceous material having a BET specific surface area of 1550 to 2500 m/g, a value of an oxygen content/hydrogen content per specific surface area of 1.00 to 2.10 mg/m, and an electrical conductivity of 10 to 15 S/cm determined by powder resistance measurement at a load of 12 kN.

The present invention relates to an additive for an electrochemical element positive electrode comprising an activated carbon, wherein the activated carbon has a specific surface area in accordance with BET method of 1300-2500 m/g, a pore volume of pores having a diameter of 2 nm or more of 0.35 cm/g or less, a pore volume of pores having a diameter less than 2 nm of 0.5 cm/g or more, and an ash content of 0.5% by weight or less.

Additive for electrochemical element positive electrode, composition for electrochemical element positive electrode including said additive, and electrochemical element

A carbonaceous material for electric double-layer capacitors that is based on a plant-derived carbon precursor, in which carbonaceous material: a BET specific surface area is 1,900 to 2,500 m/g; an average pore size is 2.2 to 2.6 nm as determined by a nitrogen adsorption method; a volume of micropores having a pore size of 2 nm or smaller is 0.84 to 1.30 cm/g as determined by the MP method; a ratio of a volume of micropores having a pore size of 1 to 2 nm with respect to the volume of the micropores having a pore size of 2 nm or smaller is 25 to 50% as determined by the MP method; and a volume of mesopores having a pore size of 2 to 50 nm is 0.16 to 0.4 cm/g as determined by the BJH method; and a method of producing same.

Carbonaceous material for electric double layer capacitors and method for producing same

A carbonaceous material may have a high capacitance per volume as well as a high durability, and/or may have a BET specific surface area is 1,500 to 1,900 m/g, an average pore size is 1.84 to 2.05 nm at a nitrogen relative pressure P/Pof 0.93 in a nitrogen adsorption isotherm measured at 77.4 K, a ratio of pore volume having a pore size of 3 nm or smaller, determined by the BJH method, is 65 to 90% relative to total pore volume calculated based on a nitrogen adsorption amount at a relative pressure P/Pof 0.93 in the nitrogen adsorption isotherm, and a ratio of pore volume having a pore size of 1 to 2 nm, determined by the MP method, is 10 to 20% relative to total pore volume calculated based on the nitrogen adsorption amount at a relative pressure P/Pof 0.93 in the nitrogen adsorption isotherm.

Carbonaceous material and method for producing same, electrode active material for electrochemical devices, electrode for electrochemical devices, and electrochemical device

A carbonaceous material for electric double-layer capacitors that is based on a plant-derived carbon precursor, in which carbonaceous material: a BET specific surface area is 1,900 to 2,500 m/g; an average pore size is 2.2 to 2.6 nm as determined by a nitrogen adsorption method; a volume of micropores having a pore size of 2 nm or smaller is 0.84 to 1.30 cm/g as determined by the MP method; a ratio of a volume of micropores having a pore size of 1 to 2 nm with respect to the volume of the micropores having a pore size of 2 nm or smaller is 25 to 50% as determined by the MP method; and a volume of mesopores having a pore size of 2 to 50 nm is 0.16 to 0.4 cm/g as determined by the BJH method.

A porous carbon material for electrodes of energy storage devices comprising: a porous carbon material; 0.5 to 5 parts by mass of an insulating material having a boiling point of 150&#xb0; C. or more based on 100 parts by mass of the porous carbon material; and 0.25 to 15 parts by mass of a conductive additive based on 100 parts by mass of the insulating material, wherein the insulating material and the conductive additive are carried on the porous carbon material in combination, and the porous carbon material has a BET specific surface area of 1300 to 2050 m/g.

Porous carbon material for electrode of energy storage device and method for manufacturing said material

There is provided a carbon material for polarizable electrodes in which a heterocyclic aromatic compound is adsorbed on an activated carbon, wherein the heterocyclic aromatic compound comprises a five- or six-membered ring having two or more nitrogen atoms as ring-forming atoms; a ratio (N/C) of nitrogen atoms to carbon atoms in the heterocyclic aromatic compound is 0.4 or more; 1 to 35 parts by mass of the heterocyclic aromatic compound is adsorbed based on 100 parts by mass of the activated carbon; and the carbon material for polarizable electrodes has a benzene adsorption capacity of 25 to 75% by mass.

Carbon material for polarizable electrodes and method for producing same

In activated carbon obtained by subjecting a carbonaceous material to an activation treatment, the overall content of alkali metals is set at 100 ppm or less, or the overall content of heavy metals is set at 20 ppm or less and the overall content of alkali metals is set at 200 ppm or less. In cases where such activated carbon is used as a raw material in electronic devices, the formation of dendrites by the reductive deposition of alkali metals or heavy metals tends not to occur, so that problems such as short-circuiting or the like tend not to arise, and a good rate of self-discharge retention is shown.

Activated carbon, method for production thereof, polarizing electrode and electrical double layer capacitor

Activated carbon useful as polarizable electrode material for an electric double-layer capacitor can be obtained by mixing a carbonaceous material and an alkali metal hydroxide while maintaining a solid state, granulating the obtained mixture while maintaining its solid state, dehydrating the obtained granulated substance while maintaining its solid state, and subjecting the granulated dehydration product obtained in the dehydration step to an activation treatment. The preferred pressure of the granulation treatment in the granulation step is 0.01 to 300 Torr, and the preferred temperature of the granulation treatment is 90 to 140&#xb0; C. The preferred pressure of the dehydration treatment in the dehydration step is 0.01 to 10 Torr, and the preferred temperature of the dehydration treatment is 200 to 400&#xb0; C.

Method for manufacturing activated carbon, polarizable electrode, and electric double-layered capacitor

A process for producing an activated carbon for an electrode of an electric double-layer capacitor, includes a step of subjecting a carbonized material to an alkali activating treatment, wherein the carbonized material has an average true specific gravity of 1.450 to 1.650 and a variation of the true specific gravities of 0.025 or less.

Process of producing activated carbon for electrode of electric double layer capacitor

To produce activated carbon for an electrode of an electric double-layer capacitor, the following steps are carried out sequentially: a step of subjecting a massive mesophase pitch to a pulverizing treatment to provide a pulverized powder; a step of subjecting the pulverized powder to an infusibilizing treatment under conditions of a temperature in a range of 300&#xb0; C. (inclusive) to 450&#xb0; C. (inclusive) in the atmospheric air current, a step of subjecting the pulverized powder to a carbonizing treatment under conditions of a temperature in a range of 600&#xb0; C. (inclusive) to 900&#xb0; C. (inclusive) in an inert gas current to provide a carbonized powder, a step of subjecting the carbonized powder to an alkali activating treatment under conditions of a temperature in a range of 500&#xb0; C. (inclusive) to 1,000&#xb0; C. (inclusive) in an inert gas atmosphere, followed by the post treatments, thereby producing alkali-activated carbon, and a step of subjecting the alkali-activated carbon to a pulverizing treatment. If an electrode is produced using the activated carbon, the electrode density can be increased.

Method for producing activated carbon for electrode of electric double-layer capacitor

Activated carbon and method for producing it

A porous adsorbent with a urea compound having a urea linkage within the molecule thereof and an inorganic acid and/or an organic acid supported on a porous support is shown. The porous adsorbent is capable of efficiently eliminating lower aldehydes at ordinary temperature for a prolonged period of time.

Porous adsorbent and filter

Preferably configured in ridge and recess irregularity, the inventive article provides adsorption of malodor components in air and also dust collecting function. It comprises woven sheet having coarse three dimensional structure whose areas of sheet surface as well as internal fiber structure allowable to contact to incoming outer air are formed with a binder layer made of latex or emulsion or non-solvent adhesive and such binder layer is adhered with activated carbon particles partially exposed. The process of adhereing activated carbon particles is conveniently performed by a fluidizing bed. The inventive sheet form fabric incorporates the particles with a high void ratio and uniformity and thereby exhibits high adsorptive rate and capacity, and exceedingly low pressure loss with such result that it is applicable regardless of high or air wind rate. Preferable use is a filter element of air-conditioner for cars.

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Bizen, Japan

Shushi Nishimura