Asahi Glass Company, Limited

Jfe Chemical Corporation

Adchemco Corporation

Kazuteru Tabayashi

Yasuhiro Mogi

Masayasu Nagoshi

Kazuhiko Yamada

Yasuo Shinozaki

Kazuyuki Murakami

Tetsuo Shiode

Hiromi Okamoto

Takaaki Kondo

Toru Shimoyama

Kunio Miyazawa

Hidetoshi Morotomi

Kenshi Noda

A carbonaceous material having a total pore volume of from 0.5 to 1.5 cm/g per unit mass, a volume of micropores having diameters of from 10 to 20 &#x212b; of from 10 to 45% based on the total pore volume, a volume of mesopores having diameters of from 20 to 200 &#x212b; of from 35 to 65% based on the total pore volume, a volume of macropores having diameters exceeding 200 &#x212b; of not more than 15% based on the total pore volume, and a specific surface area of from 1,000 to 2,500 m/g. The carbonaceous material is incorporated into an electric double layer capacitor to provide increased capacitance.

Carbonaceous material, its production process and electric double layer capacitor employing it

Boron-substituted graphite, which contains N-bonded boron atoms in a small proportion relative to whole substituted boron atoms, is produced by heating a feed fine particulate mixture of an infusibilized carbonaceous material and a boron compound such that the carbonaceous material is carbonized into a carbon structure, raising a temperature of the resulting heated fine particulate mixture promptly to a graphitization treatment temperature in an inert atmosphere unreactive with boron, retaining the graphitization treatment temperature for a time sufficient to allow graphitization of the carbon structure to proceed to a desired extent, and then quickly cooling the resulting graphitized mixture. The boron-substituted graphite is useful as a negative electrode in a lithium-ion secondary battery.

Production process of material for lithium-ion secondary batteries, material obtained by the process, and batteries

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Tokyo, Japan

Kazuteru Tabayashi