The Furukawa Electric Co., Ltd.

National Institute of Advanced Industrial Science and Technology

The Furukawa Battery Co., Ltd.

Michihiro Shimada

Michio Ohkubo

Hitoshi Kimura

Toshio Tani

Naoki Uno

Tetsuo Matsumoto

Yosuke Hirayama

Takeshi Yagi

Takeshi B Nishimura

Hajime Watanabe

Kinji Asaka

Masahiro Hasegawa

Takushi Sugino

Hidetoshi Abe

Hiroaki Rikihisa

Ken Mukai

Kenji Uesugi

Masato Tachibana

Miyu Aita

Takuya Nisimoto

A method for producing an aggregated thread structure includes (a) a process of dispersing carbon nanotube to a first solvent, which is water or a mixed solvent containing organic solvent and water, with a surfactant, to create a dispersion and (b) a process of injecting the dispersion, in which carbon nanotube is dispersed, to a condensing liquid, which is a second solvent that differs from the first solvent, to thereby aggregate and spin carbon nanotube. The aggregated thread structure containing carbon nanotube has: a bulk density of 0.5 g/cmor more; a weight reduction rate up to 450&#xb0; C. of 50% or less; a G/D ratio for resonance Raman scattering measurement of 10 or more; and an electric conductivity of 50 S/cm or more.

Aggregated thread structure, production method thereof, and electric wire using the same

An object of the present invention is to provide a cathode active material which contains small-particle sized and low-crystalline lithium transition metal silicate and which undergoes charge-discharge reaction at room temperature. The cathode active material for a non-aqueous electrolyte secondary battery is characterized by containing a lithium transition metal silicate and exhibits diffraction peaks having half widths of 0.175 to 0.6&#xb0;, the peaks observed through powder X-ray diffractometry within a 2&#x3b8; range of 5 to 50&#xb0;.

Cathode active material, cathode, secondary battery and manufacturing methods for the same

A particulate mixture which can be used as a precursor of lithium transition metal silicate-type compound of small particle size and low crystallinity, is provided. It is a mixture of silicon oxide particulates, transition metal oxide particulates, and lithium transition metal silicate particulates, and its powder X-ray diffraction measurement shows diffraction peaks near 2&#x3b8;=33.1&#xb0; and near 2&#x3b8;=35.7&#xb0;, and said silicon oxide particulates and said transition metal oxide particulates are amorphous, and said lithium transition metal silicate particulates are in a microcrystalline or amorphous state.

Particulate mixture, active material aggregate, cathode active material, cathode, secondary battery and methods for producing the same

Rotary connector

Method of automatically determining flaws of an object of examination

Insulated power cable

There is provided a rubber/plastic insulated power cable or a joint of power cables which comprises a conductor or a conductor joint having an inner semiconductor layer and an insulation layer, and if necessary, an outer semiconductor layer, formed thereon in the order named, at least one of these layers being formed of a crosslinked structure of an olefin resin composition containing an olefin resin, an organic peroxide, and 2,4-diphenyl-4-methyl-1-pentene. The 2,4-diphenyl-4-methyl-1-pentene serves to inhibit 'amber' of the olefin resin composition by the organic peroxide used and to increase the degree of crosslinking of crosslinked structure. Also, the olefin resin with a high melting point can be used as a base resin. Therefore, the resultant power cable and joint have highly improved AC breakdown strength, impulse breakdown strength at a high temperature and much less generation of electrical trees due to 'amber', so that they are useful particularly high-voltage application.

Rubber/plastic insulated power cables and a joint thereof and a method

Growing community of inventors

Tokyo, Japan

Michihiro Shimada