Other

The University of Tokyo

National Institute of Advanced Industrial Science and Technology

Hitachi Maxell, Limited

Sekisui Chemical Co., Ltd.

Itaru Honma

Shigeki Nomura

Osamu Nishikawa

Toshiya Sugimoto

Tetsuichi Kudo

Keiji Sakai

Hiroshi Abe

Yasuo Takeda

Masaru Miyayama

Kun-ichi Miyazawa

Toru Kuzumaki

Kunio Ito

Junya Yano

An electrode material for an electrochemical device comprising a composite of a particulate conductive material and a metal oxide is prepared by mixing and dispersing the particulate conductive material with a colloidal solution of an oxide of an element in a range of from Group 3 to Group 12 in the fourth, fifth and sixth periods of the Periodic Table and heating the mixture. This composite has a high capacity even at a high current density and good filling properties, and is useful as an electrode material for an electrochemical device such as a lithium secondary battery or an electrochemical capacitor. When the electrode material comprising this composite is used, an electrode can be produced without any binder, and the electrochemical device having good output characteristics can be constructed.

Electrode material for electrochemical element and method for production thereof, and electrochemical element

A proton-conducting membrane, excellent in resistance to heat, durability, dimensional stability and fuel barrier characteristics, and showing excellent proton conductivity at high temperature and a method for producing the same. A proton-conducting membrane includes a carbon-containing compound and inorganic acid, characterized by a phase-separated structure containing a carbon-containing phase containing at least 80% by volume of the carbon-containing compound and inorganic phase containing at least 80% by volume of the inorganic acid, the inorganic phase forming the continuous ion-conducting paths. The method for producing the above proton-conducting membrane includes steps of preparing a mixture of a carbon-containing compound (D) having one or more hydrolyzable silyl groups and inorganic acid (C), forming the above mixture into a film, and hydrolyzing/condensing the hydrolyzable silyl group contained in the mixture formed into the film, to form a three-dimensionally crosslinked silicon-oxygen structure (A). The above proton-conducting membrane is incorporated in a fuel cell.

Proton-conducting membrane, method for producing the same, and fuel cell using the same

A fullerene-dispersed ceramic is produced by an improved method in which C,or like fullerene, and C,TMA or like surfactant, are dissolved in a solution of metallic compound, such as zirconyl nitrate, to form a colloidal solution. A gel is formed from the colloidal solution by changing its hydrogen ion concentration. The gel is dried and subjected to heat treatment, to eliminate remaining solvent and surfactant, and thereby stably obtain the desired fullerene-dispersed ceramic powder in which the fullerene is uniformly dispersed and which is essentially free from carbon other than fullerene.

Method of producing fullerene-dispersed ceramics

Growing community of inventors

Tsukuba, Japan

Itaru Honma