Agency of Industrial Science and Technology

Japan As Represented by Director General of Agency of Industrial Science

Masamichi Yoshimura

Isao Mochida

Seiji Fukuyama

Kiyoshi Yokogawa

Bai An

Yozo Korai

Minato Egashira

Disclosed is a novel structured body of carbon in the form of a particle having electric conductivity comparable with graphite, which has a frustum-formed protrusion formed from a top flat consisting of a single carbon pentagon and a lateral surface consisting of a plurality of carbon hexagons. The structured body of carbon is prepared by a two-stage heat treatment of a carbonaceous material having a carbon pentagon to form a crystalline structure, such as a fullerene compound, in a non-oxidizing atmosphere. The first stage heat treatment is conducted at 800 to 1200&deg; C. to effect complete degradation of the crystalline structure of the starting material into an amorphous state and the second stage heat treatment is conducted at 1800 to 2500&deg; C. to effect re-crystallization but not to cause graphitization.

Structured body of carbon having frustum protrusion and method for the preparation thereof

A novel carbonaceous material having a unique periodical annular electronic surface structure as examined by means of a scanning tunnel microscopy can be obtained by the method comprising the steps of: (a) forming a layer of a carbonaceous material having a curved configuration by the method of vapor-phase deposition of a carbonaceous material; and (b) subjecting the vapor-phase deposited layer of the carbonaceous material to a heat treatment at a temperature of 1500 K or higher in a non-oxidizing atmosphere. The novel carbonaceous material is useful for carbon electrodes of various batteries.

Carbonaceous material having novel electronic structure of surface and

Growing community of inventors

Nagoya, Japan

Masamichi Yoshimura