Shin-etsu Chemical Co., Ltd.

Kouichi Urano

Mikio Aramata

Hirofumi Fukuoka

Satoru Miyawaki

Kazuma Momii

A silicon composite comprises silicon particles whose surface is at least partially coated with a silicon carbide layer. It is prepared by subjecting a silicon powder to thermal CVD with an organic hydrocarbon gas and/or vapor at 900-1,400&#xb0; C., and heating the powder for removing an excess free carbon layer from the surface through oxidative decomposition.

Silicon composite, making method, and non-aqueous electrolyte secondary cell negative electrode material

Silicon composite particles are prepared by sintering primary fine particles of silicon, silicon alloy or silicon oxide together with an organosilicon compound. Sintering of the organosilicon compound results in a silicon-base inorganic compound which serves as a binder. Each particle has the structure that silicon or silicon alloy fine particles are dispersed in the silicon-base inorganic compound binder, and voids are present within the particle.

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Annaka, Japan

Kouichi Urano