Mitsui Mining Co., Ltd.

Other

Youichiro Hara

Kenji Fukuda

Tatsuo Umeno

Tadanori Tsunawaki

Yoshinori Yasumoto

Osamu Matsunaga

Kohei Murayama

Takashi Hiruta

Tasuku Saito

Shigeki Endo

Katsusuke Iwanaga

Koji Sakata

Howard See

Graphite particles having a bent laminate structure inside each particle are produced by feeding, into an impact grinder, graphite particles having an average particle diameter of 5 mm or less together with a gas current to apply an impact to the graphite particles to form, by a compression force, a bent laminate structure inside each graphite particle. The resulting graphite particles have an average particle diameter of 100 &#x3bc;m or less, are low in anisotropy, have a nearly spherical shape, and are highly crystalline.

Graphite particles and process for production thereof

An anode material for lithium secondary battery, which comprises graphite particles and a crystalline carbon coating layer formed thereon, wherein each graphite particle has a bent laminate structure inside, is produced by grinding a graphite of 5 mm or less in average particle diameter using an impact grinder to produce graphite particles of 100 &#x3bc;m or less in average particle diameter having a bent laminate structure inside each particle and then subjecting the graphite particles to chemical vapor deposition in a fluidized bed type reaction furnace to form a crystalline carbon coating layer on the graphite particles.

Anode material for lithium secondary battery, process for production thereof, and lithium secondary battery

The present invention can provide particles for electro-rheological fluid for providing a high electro-rheological effect over a wide temperature range at low electric power consumption, and having high strength and excellent durability, not being susceptible to break-up due to the load of stress. Particles for an electro-rheological fluid of the present invention comprise spherical carbonaceous particles, obtained substantially from a solvent and a condensation product of a methylene type bond of aromatic sulfonic acid or a salt thereof.

Particles for electro-rheological fluid

Composite material for anode of lithium secondary battery, and lithium secondary battery

The present invention discloses an anode material for lithium secondary battery, comprising a particulate core composed of a metal or semimetal capable of forming a lithium alloy and a carbon layer covering the surface of the particulate core; a lithium secondary battery using said anode material; and a method for discharging of said secondary battery.

Anode material for lithium secondary battery, lithium secondary battery using said anode material, and method for charging of said secondary battery

Growing community of inventors

Fukuoka, Japan

Youichiro Hara