Shin-etsu Chemical Co., Ltd.

Tokyo Electron Limited

Tokyo Electoron Limited

Tokyo Electron Tohoku Limited

Nobuo Kawada

Toshio Ohba

Junichi Arami

Kenji Ishikawa

Shigeru Konishi

Takaaki Nagao

Shoji Kano

Masaya Ueno

Isao Yanagisawa

Ryoji Nakajima

Yoshihiro Kubota

Mitsuhito Takahashi

Harunori Ushikawa

Hiroshi Mogi

Hironori Yagi

Norifumi Takahashi

Youichi Deguchi

Toshihiko Shindo

Yukio Kurosawa

Kazuhiro Yamaguchi

Kesazi Harada

Kenji Itou

Hiroshi Matsukawa

Kazuhiko Urano

Toshihiko Shindoh

Nobuo Arai

Koji Hagiwara

The present invention is a negative electrode material for a secondary battery with a non-aqueous electrolyte comprising at least a silicon-silicon oxide composite and a carbon coating formed on a surface of the silicon-silicon oxide composite, wherein at least the silicon-silicon oxide composite is doped with lithium, and a ratio I(SiC)/I(Si) of a peak intensity I(SiC) attributable to SiC of 2&#x3b8;=35.8&#xb1;0.2&#xb0; to a peak intensity I(Si) attributable to Si of 2&#x3b8;=28.4&#xb1;0.2&#xb0; satisfies a relation of I(SiC)/I(Si)&#x2264;0.03, when x-ray diffraction using Cu-K&#x3b1; ray. As a result, there is provided a negative electrode material for a secondary battery with a non-aqueous electrolyte that is superior in first efficiency and cycle durability to a conventional negative electrode material.

Negative electrode material for secondary battery with non-aqueous electrolyte, method for manufacturing negative electrode material for secondary battery with non-aqueous electrolyte, and lithium ion secondary battery

The present invention is a negative electrode material for a secondary battery with a non-aqueous electrolyte comprising at least a silicon-silicon oxide composite and a carbon coating formed on a surface of the silicon-silicon oxide composite, wherein at least the silicon-silicon oxide composite is doped with lithium, and a ratio I(SiC)/I(Si) of a peak intensity I(SiC) attributable to SiC of 2&#x3b8;=35.8&#xb1;0.2&#xb0; to a peak intensity I(Si) attributable to Si of 2&#x3b8;=28.4&#xb1;0.2&#xb0; satisfies a relation of I(SiC)/I(Si)&#x2266;0.03, when x-ray diffraction using Cu-K&#x3b1; ray. As a result, there is provided a negative electrode material for a secondary battery with a non-aqueous electrolyte that is superior in first efficiency and cycle durability to a conventional negative electrode material.

Negative electrode material for secondary battery having lithium-doped silicon-silicon oxide composite, method for manufacturing negative electrode, and lithium secondary battery

Disclosed is an electrolyte membrane-electrode assembly for direct methanol fuel cells, wherein a solid polymer electrolyte membrane is held between a pair of electrodes each composed of a catalyst layer coated over and/or impregnated in a porous supporting body. This electrolyte membrane-electrode assembly for direct methanol fuel cells is characterized in that the solid polymer electrolyte membrane is obtained by irradiating a resin membrane with radiation and graft-polymerizing a radically polymerizable monomer. The electrolyte membrane-electrode assembly for direct methanol fuel cells is further characterized in that the catalyst layer of the anode electrode comprises a catalyst, wherein platinum group metal or platinum-containing alloy particles having a particle size of 5 nm or less are supported by carbon particles, and a solid polymer electrolyte, and the noble metal amount in the catalyst layer of the anode electrode is not more than 5 mg/cm. By using such a catalyst, there can be obtained a direct methanol fuel cell wherein high output is achieved by using high methanol concentration.

Electrolyte membrane-electrode assembly for direct methanol fuel cell

The present invention is a negative electrode material for a secondary battery with a non-aqueous electrolyte comprising at least a silicon-silicon oxide composite and a carbon coating formed on a surface of the silicon-silicon oxide composite, wherein at least the silicon-silicon oxide composite is doped with lithium, and a ratio I(SiC)/I(Si) of a peak intensity I(SiC) attributable to SiC of 2&#x3b8;=35.8&#xb1;0.2&#xb0; to a peak intensity I(Si) attributable to Si of 2&#x3b8;=28.4&#xb1;0.2&#xb0; satisfies a relation of I(SiC)/I(Si)&#x2266;0.03, when x-ray diffraction using Cu&#x2014;K&#x3b1; ray. As a result, there is provided a negative electrode material for a secondary battery with a non-aqueous electrolyte that is superior in first efficiency and cycle durability to a conventional negative electrode material.

A method for manufacturing a negative electrode material for a secondary battery with a non-aqueous electrolyte, including coating a surface of a powder with 1 to 40 mass % carbon by heat CVD treatment under an organic gas and/or vapor atmosphere at a temperature between 800&#xb0; C. and 1300&#xb0; C., blending lithium hydride and/or lithium aluminum hydride with the carbon-coated powder; and heating the carbon-coated powder at a temperature between 200&#xb0; C. and 800&#xb0; C. to be doped with lithium at a doping amount of 0.1 to 20 mass %. The powder is composed of at least one of silicon oxide represented by general formula of SiO(x=0.5 to 1.6) and a silicon-silicon oxide composite having a structure so that silicon particles having a size of 50 nm or less are dispersed to silicon oxide in an atomic order and/or a crystallite state, and having a Si/O molar ratio of 1/0.5 to 1/1.6.

Negative electrode material for secondary battery having lithium-doped silicon-silicon oxide composite

Disclosed is an electrolyte for fuel cells, which is mainly composed of a copolycondensate of a polyimide having an alkoxysilyl group at an end and an alkoxysilane having an ion-conducting group. Also disclosed are an electrolyte membrane for fuel cells, a binder for fuel cells and a membrane electrode assembly for fuel cells, each using the electrolyte, and a fuel cell using such a membrane electrode assembly for fuel cells. The electrolyte enables to obtain an electrolyte membrane, a binder and a membrane electrode assembly, each having high ion conductivity, high strength, high toughness, low swelling and low fuel permeability suitable for fuel cells. By using such an electrolyte, there can be obtained a low-cost fuel cell having high output power and high durability.

Electrolyte for fuel cell, electrolyte membrane for fuel cell, binder for fuel cell, membrane electrode assembly for fuel cell, and fuel cell

A high-performance solid polyelectrolyte film is provided which is produced by the radiation-induced graft polymerization method without causing solution gelation and which is excellent in mechanical strength, chemical stability, and dimensional stability and reduced in methanol permeability. According to the present invention, the solid polyelectrolyte film is produced by graft-polymerizing either a polymerizable monomer having an alkoxysilyl group alone or the polymerizable monomer having an alkoxysilyl group and another polymerizable monomer with a resin film which has been irradiated with a radiation, followed by hydrolyzing the alkoxysilyl groups to conduct dehydrating condensation. In addition, this solid polyelectrolyte film is disposed between a fuel electrode and an air electrode to fabricate a fuel cell.

Process for producing solid polyelectrolyte film by graft-polymerizing polymerizable monomer with fluororesin film, solid polyelectrolyte film obtainable by the process, and fuel cell

A curable resin composition for fuel cell electrolyte films characterized by comprising (1) 100 parts by mass of a monomer having at least one ethylenically unsaturated group per molecule and having, per molecule, either at least one, tonically conductive group or at least one precursor group capable of giving an tonically conductive group through a chemical reaction, (2) 10-400 parts by mass of an oligomer which has, per molecule, at least two reactive groups copolymerizable with the ethylenically unsaturated group of the ingredient (1) and has a number-average molecular weight of 400 or higher, (3) 10-400 parts by mass of a fluororesin, and (4) 0-2,000 parts by mass of a solvent.

Curable resin composition for fuel cell electrolyte film and electrolyte film, process for producing the same, electrolyte film/electrode assembly, and process for producing the same

The present invention relates to a solid polymer electrolyte membrane having both of a higher proton conductivity and a smaller methanol permeability, which can be produced by conducting a graft polymerization of a fluororesin thin membrane irradiated with a radiation with a monofunctional monomer and again irradiating the resulting film with a radiation, followed by conducting a graft polymerization thereof with a polyfunctional monomer; and a high-performance fuel cell comprising the solid polymer electrolyte membrane, a fuel electrode and an air electrode, said solid polymer electrolyte membrane being disposed between the fuel electrode and the air electrode.

Solid polymer electrolyte membrane and process for producing the same, and fuel cell

An optical fiber is prepared by applying a liquid electron beam-curable resin composition to a bare optical fiber or a coated optical fiber having a primary or secondary coating on a bare optical fiber, irradiating electron beams to the resin composition on the optical fiber for curing while the optical fiber passes a zone under substantially atmospheric pressure, and providing a magnetic field and optionally an electric field in the zone for thereby improving the efficiency of electron irradiation. The method can comply with the increased drawing speed of the bare optical fiber and does not detract from the transmission properties of the optical fiber.

Preparation of optical fiber

An electron beam system for treating filamentary workpieces includes an electron beam irradiation chamber having openings through which passes a filamentary workpiece, an electron beam generator including means for generating, accelerating and focusing electrons, and a communicating section which connects the electron beam generator with the electron beam irradiation chamber. The system also has a differential evacuating means for holding the pressure within the electron beam generator below that within the electron beam irradiation chamber. Electrons are generated, accelerated, and focused by the electron beam generator into a beam which passes from the generator through the communicating section to the electron beam irradiation chamber where the beam is directed at a filamentary workpiece. The system is able to uniformly, efficiently, and continuously apply electron beam irradiation to a traveling filamentary workpiece. When used in the fabrication of optical fiber, this system can accommodate higher fiber drawing speeds without compromising the transmission characteristics of the resulting optical fiber.

Electron beam system for treating filamentary workpiece, and method of fabricating optical fibers

Methods for curing a coating material, including a primary coating material, a secondary coating material, and a taping material, on an optical fiber. An optical fiber coating material having (A) 100 parts by weight of a polyether polyurethane bearing at least two ethylenically unsaturated groups with a Mn of 800-10,000, and (B) 1-40 parts by weight of a nitrogenous reactive diluent is cured by irradiating thereto electron beams, produced by driving electrons under an accelerating voltage of 50-190 kV, in a dose of 10-100 kGy. The method succeeds in effectively curing the optical fiber coating material into a cured coating having stable properties.

Method for curing optical fiber coating material

A heating device is formed by a heating plate formed of silica and having a heating surface for heating an object to be heated, a heating element having a predetermined pattern and fixed to a surface opposing the heating surface of the heating plate, and a reflecting plate formed of silica and brought into tight contact with the surface of the heating plate on which the heating element is formed. This heating device is arranged in a processing vessel in a CVD apparatus, and a semiconductor wafer is placed on the heating device. A process gas is supplied into the processing vessel while the semiconductor wafer is heated, thereby forming a predetermined film on the semiconductor wafer.

Heating device, method of manufacturing the same, and processing

Proposed is an improvement in a vessel, e.g., crucible, of pyrolytic boron nitride (PBN) used, for example, in the process of molecular beam epitaxy for melting silicon and the like at a high temperature. Different from conventional PBN crucibles used for such a process, in which contamination of high-purity silicon is unavoidable by the reaction of molten silicon with PBN or a thermal decomposition products of boron nitride, the inventive PBN vessel is provided on the surface with a protective coating layer of pyrolytic graphite or a refractory metal such as platinum so as not to cause troubles due to contamination of high-purity silicon melted therein with the crucible materials.

Growing community of inventors

Annaka, Japan

Nobuo Kawada