Shin-etsu Chemical Co., Ltd.

Shin-estu Chemical Co., Ltd.

Mikio Aramata

Susumu Ueno

Tetsuya Inukai

Satoru Miyawaki

Hirofumi Fukuoka

Toshio Shinohara

Hajime Ishizaka

Yoichi Tanifuji

Meguru Kashida

Kazuma Momii

Kazutoshi Fujioka

Masaaki Furuya

Takeshi Fukuda

Shigeru Mori

Motoo Fukushima

Tetsuo Nakanishi

Akio Muraida

Shoji Ichinohe

Kunio Itoh

Yoshitaka Hamada

Yoshihiro Shirota

Masahiro Yuyama

Yukinori Satou

Kouichi Urano

Hidetaka Konno

Akio Ohori

Koichiro Watanabe

Ryuichi Saito

Masaki Kasashima

Tatsuya Fujimoto

Hideaki Ozeki

Kenji Saito

Kenji O&otilde;ka

Masaki Kasahima

Hisashi Konishi

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

A separator carries lithium particles on its surface. Using the separator, a non-aqueous electrolyte secondary battery having a high initial efficiency and improved cycle retentivity is available.

Separator for non-aqueous secondary battery, making method, and non-aqueous electrolyte secondary battery

An efficient method for producing a silicon oxide powder at a low cost is provided. This method comprises the steps of heating a powder mixture of a silicon dioxide powder and a metal silicon powder to a temperature of 1,100 to 1,450&#xb0; C. in an inert gas or under reduced pressure to generate silicon monoxide gas, and precipitating the silicon monoxide gas on a surface of a substrate to produce the silicon oxide powder, and in this method, the silicon dioxide powder has an average particle diameter of up to 1 &#x3bc;m, and the metal silicon powder has an average particle diameter of 30 &#x3bc;m.

Method for producing silicon oxide powder

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.

Silicon composite particles, preparation thereof, and negative electrode material for non-aqueous electrolyte secondary cell

A silicon-silicon oxide-lithium composite comprises a silicon-silicon oxide composite having such a structure that silicon grains having a size of 0.5-50 nm are dispersed in silicon oxide, the silicon-silicon oxide composite being doped with lithium. Using the silicon-silicon oxide-lithium composite as a negative electrode material, a lithium ion secondary cell having a high initial efficiency and improved cycle performance can be constructed.

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

A carbonate-modified silane or siloxane is combined with a non-aqueous solvent and an electrolyte salt to form a non-aqueous electrolytic solution, which is used to construct a secondary battery having improved charge/discharge characteristics.

Non-aqueous electrolytic solution, secondary battery, and electrochemical capacitor

A Si&#x2014;C&#x2014;O composite powder is obtained by curing a reactive silane or siloxane having crosslinkable groups through heat curing or catalytic reaction into a crosslinked product and sintering the crosslinked product in an inert gas stream at a temperature of 700-1,400&#xb0; C. into an inorganic state. It exhibits satisfactory cycle performance when used as the negative electrode material for non-aqueous electrolyte secondary cells.

Si-C-O composite, making method, and non-aqueous electrolyte secondary cell negative electrode material

A cyclic carbonate-modified silane or siloxane is combined with a non-aqueous solvent and an electrolyte salt to form a non-aqueous electrolytic solution, which is used to construct a secondary battery having improved temperature and high-output characteristics.

Cyclic carbonate-modified organosilicon compound, non-aqueous electrolytic solution, secondary battery and capacitor

Organohalosilanes are prepared by charging a reactor with a contact mass comprising metallic silicon and a catalyst and feeding an organohalide-containing gas to the reactor. The contact mass is prepared by premixing metallic silicon and a tin compound and heat treating the premix at 300-600&#xb0; C. in an inert gas atmosphere.

Making of contact mass for organohalosilane preparation and preparation of organohalosilanes

A non-aqueous electrolytic solution is provided comprising a non-aqueous solvent, an electrolyte salt, and a siloxane modified with ether bond-bearing organic group. A non-aqueous electrolyte secondary battery using the same has improved characteristics both at low temperatures and at high outputs.

Non-aqueous electrolytic solution and battery

Organohalosilanes are prepared by charging a reactor with a contact mass of metallic silicon and a catalyst and feeding an organohalide-containing gas to the reactor. Tin or a tin compound is used as the catalyst. Then organohalosilanes can be produced quite efficiently at a high reaction rate while maintaining a low T/D ratio and minimizing the deposition of by-products and carbon.

Preparation of organohalosilanes

A non-aqueous electrolyte secondary battery negative electrode material is provided wherein a negative electrode active material containing a lithium ion-occluding and releasing material which has been treated with an organosilicon base surface treating agent is surface coated with a conductive coating. Using the negative electrode material, a lithium ion secondary battery having a high capacity and improved cycle performance is obtainable.

Non-aqueous electrolyte secondary battery negative electrode material, making method, and lithium ion secondary battery

Organohalosilanes are prepared by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst. A contact mass composed of metallic silicon and copper catalyst contains an effective amount of a catalyst powder obtained by mechanical surface treatment of a powder mixture of tin powder and another metal, typically copper powder, on a ball mill, stamp mill, jet mill, mechanofusion device or the like.

A non-aqueous electrolytic solution is provided comprising a non-aqueous solvent, an electrolyte salt, and a siloxane-modified polyoxyalkylene compound having (poly)organosiloxane structures at both ends of polyoxyalkylene. A secondary battery using the same has improved temperature characteristics and high-output characteristics.

Non-aqueous electrolytic solution and secondary battery

Organohalosilanes are prepared by reacting metallic silicon particles with an organohalide in the presence of a copper catalyst. A contact mass composed of the metallic silicon and the copper catalyst contains an effective amount of a catalyst alloy containing 0.2&#x2013;8 wt % of tin and 4&#x2013;20 wt % of phosphorus which is powdered by atomization.

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Annaka, Japan

Mikio Aramata