Nippon Sanso Corporation

Akira Wakaizumi

Takushi Ohsaki

Akihiro Nakamura

Takashi Inui

Masayoshi Hayashida

Shinichi Marumo

Mitsuo Kigure

Toshiya Miyagawa

Katsuyoshi Yanagita

Ryuichi Yazaki

Hiroshi Taira

Nobuyasu Tomita

Satoshi Sawaguchi

Hiroyuki Miyake

Fusao Nakamura

Tadao Adachi

A halogen treatment is conducted comprising: a halogenation step wherein a halogenation heat treatment for preparing a halogenated carbonized charcoal is conducted in which the carbonized charcoal is brought into contact with halogen; and a dehalogenation step wherein a dehalogenation treatment is conducted in which a part of or all halogen atoms in the halogenated carbonized charcoal are eliminated. A porous carbonaceous material is obtained at a high yield, and the amounts of nitrogen, oxygen, carbon dioxide, and methane adsorbed by this porous carbonaceous material are large. When this porous carbonaceous material is used as an electrical double layer capacitor carbon, the electrostatic capacity is increased compared to conventional carbonaceous materials. Consequently, a carbonaceous material is obtained which has micopores and/or sub-micropores which are suitable for the adsorption of small molecules such as nitrogen, and for storage of electrochemical energy.

Porous carbonaceous material, manufacturing method therefor and use thereof

Carbon adsorbent, manufacturing method therefor, gas separation method

Manufacturing method for carbon material for electrical double layer

Disclosed is a carbon negative electrode material containing microparticles of hard carbon. The pores in the carbon microparticles have an inlet diameter such that an organic solvent in an electrolyte of a lithium secondary cell is substantially impermeable and that lithium ions are permeable. Use of such carbon negative electrode material as a negative electrode enables to provide a lithium secondary cell with excellent cell capacity, in which charge capacity and discharge capacity are improved and irreversible capacity is minimized.

Carbon negative electrode materials and lithium secondary cells

It is the objective of the present invention to provide an active carbon electrode which is of sufficient mechanical strength to be formed into a large plate, may be suitably used as an electrical double layer condenser capable of a large current discharge, and which can realize a high capacitance. The method of production for such an active carbon electrode comprises the steps of a) producing a carbon base material by carrying out a first activation treatment to a carbon material obtained by carbonization of a carbon compound; b) producing a formed body by adding a binder to the carbon base material; c) carbonizing the formed body; and d) producing an active carbon electrode by carrying out a second activation treatment to the carbonized formed body.

Method of production for active carbon electrode for use as electrical

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Kitakoma-gun, Japan

Akira Wakaizumi