Showa Denko K.k.

Umicore

Nec Corporation

Showa Denko Kabushiki Kaisha

Aji Co., Ltd.

Nobuaki Ishii

Masataka Takeuchi

Stijn Put

Michihiro Takama

Takeshi Nakamura

Katsumi Murofushi

Kouichi Wada

Nicolas Marx

Dirk Van Genechten

Kazuo Sekiguchi

Hirokazu Murata

Koichi Wada

Arihiro Muto

Hideo Miyata

Shigeru Yamaki

Yuta Hirano

Yotaro Hattori

Yasunari Otsuka

Junko Futami

Hiroyuki Takahashi

Ryuji Yamamoto

Masaaki Okada

Yoshiaki Ikenoue

Jan Gilleir

Shinobu Ito

Kris Driesen

Kotaro Yano

Mohit Jain

Kunio Yoshida

Yvan A Strauven

Keiji Kawasaki

Gen Motoyoshi

Kiyotaka Horikawa

Jin Hu

Yasuo Saito

Yoshifumi Urakawa

Nader Marandian Hagh

Katsuro Urakawa

Miyuki Tomita

Nobuyuki Mitarai

Farid Badway

Masashi Sakaguchi

Arihiro Mutoh

Krista Martin

Mitsuharu Irie

Sam Siau

Akihiro Muto

A negative electrode material for lithium ion secondary batteries, including composite material particles containing nanosilicon particles having a 50% particle diameter (D) of 5 to 100 nm in a number-based cumulative particle size distribution of primary particles, graphite particles and an amorphous carbon material; the composite material particles containing the nanosilicon particles at a content of 30 to 60 mass % or less, and the amorphous carbon material at a content of 30 to 60 mass % or less; the composite material particles having a 90% particle diameter (D) in the volume-based cumulative particle size distribution of 10.0 to 40.0 &#x3bc;m, a BET specific surface area of 1.0 to 5.0 m/g, and an exothermic peak temperature in DTA measurement of 830&#xb0; C. to 950&#xb0; C. Also disclosed is a paste for negative electrodes, a negative electrode sheet, a lithium ion secondary battery and a method for manufacturing the negative electrode material.

Negative electrode material for lithium ion secondary batteries, method for manufacturing the same, paste for negative electrode, negative electrode sheet, and lithium ion secondary

Powder comprising particles comprising a matrix material and silicon-based domains dispersed in this matrix material, whereby the matrix material is carbon or a material that can be thermally decomposed to carbon, whereby either part of the silicon-based domains are present in the form of agglomerates of silicon-based domains whereby at least 98% of these agglomerates have a maximum size of 3 &#x3bc;m or less, or the silicon-based domains are not at all agglomerated into agglomerates.

Powder, electrode and battery comprising such a powder

A negative electrode material for a lithium ion battery, including silicon-containing particles, artificial graphite particles and a carbonaceous material, wherein at least part of the silicon-containing particles, the artificial graphite particles and the carbonaceous material form composite particles; wherein the silicon-containing particles are silicon particles having a SiOx (0&#x3c;x&#x2264;2) layer on the particle surface, having an oxygen content of 1.0 mass % or more and 18.0 mass % or less, and mainly containing particles having a primary particle diameter of 200 nm or less; wherein the artificial graphite particles are non-flaky artificial graphite particles and have a 50% particle diameter in a volume-based cumulative particle size distribution, D50, of 1.0 &#x3bc;m or more and 15.0 &#x3bc;m or less. Also disclosed is a lithium-ion battery including a negative electrode using the negative electrode material.

Negative electrode material for lithium-ion batteries including non-flaky artificial graphite including silicon-containing particles, artificial graphite particles and carbonaceous material

Composite powder for use in an anode of a lithium ion battery, whereby the particles of the composite powder comprise silicon-based domains in a matrix, whereby the individual silicon-based domains are either free silicon-based domains that are not or not completely embedded in the matrix or are fully embedded silicon-based domains that are completely surrounded by the matrix, whereby the percentage of free silicon-based domains is lower than or equal to 4 weight % of the total amount of Si in metallic or oxidized state in the composite powder.

Composite powder for use in an anode of a lithium ion battery, method of preparing such a composite powder and method for analysing such a composite powder

The present invention relates to a negative electrode material for a lithium ion battery, made of a composite material comprising silicon-containing particles, artificial graphite particles and a carbon coating layer, wherein the silicon-containing particles are silicon particles having a SiOx layer (0&#x3c;x&#x2264;2) on a particle surface, have an oxygen content ratio of 1 mass % or more and 18 mass % or less, and mainly comprise particles having a primary particle diameter of 200 nm or less; and the artificial graphite particles have a scale-like shape. By using the negative electrode material, a lithium ion battery having a high capacitance and excellent charge-discharge cycle characteristics can be produced.

Negative electrode material for lithium ion batteries and use thereof

A method for producing a negative electrode material for lithium ion secondary battery which includes: pressing a mixed liquid comprising particles (B) containing an element capable of occluding/releasing lithium ions, carbon nanotubes (C) of which not less than 95% by number have a fiber diameter of not less than 5 nm and not more than 40 nm, and water into a pulverizing nozzle of a high-pressure dispersing device to obtain a paste or slurry; drying the paste or slurry into a powder; and mixing the powder and carbon particles (A). A negative electrode material for lithium ion secondary battery including carbon particles (A); and flocculates in which particles (B) containing an element capable of occluding/releasing lithium ions and carbon nanotubes (C) of which not less than 95% by number has a fiber diameter of not less than 5 nm and not more than 40 nm are uniformly composited.

Negative electrode material for lithium ion secondary battery

A negative electrode material for lithium ion batteries is obtained by a method which includes: mixing carbon particles (B) such as graphite particles, particles (A), such as Si particles, containing an element capable of occluding and releasing lithium ions, a carbon precursor such as sucrose, a carboxylic acid compound such as acetic acid, and a liquid medium such as water or isopropyl alcohol to prepare a slurry; drying and solidifying the slurry; and heat-treating the resulting solidified material to carbonize the carbon precursor. A lithium ion battery is obtained using this negative electrode material.

Method for producing negative electrode material for lithium ion batteries

Particles (A) including an element capable of intercalating and deintercalating lithium ions, carbon particles (B) capable of intercalating and deintercalating lithium ions, multi-walled carbon nanotubes (C), carbon nanofibers (D) and optionally electrically conductive carbon particles (E) are mixed in the presence of shear force to obtain a composite electrode material. A lithium ion secondary battery is obtained using the above composite electrode material.

Composite electrode material

Provided is composite carbon fibers comprising multi-walled carbon nanotubes wherein 99% by number or more of the multi-walled carbon nanotubes have a fiber diameter of not less than 5 nm and not more than 40 nm, carbon particles having a primary particle diameter of not less than 20 nm and not more than 100 nm and graphitized carbon nanofibers wherein 99% by number or more of the graphitized carbon nanofibers have a fiber diameter of not less than 50 nm and not more than 300 nm, wherein the multi-walled carbon nanotubes are homogeneously dispersed between the graphitized carbon nanofibers and the carbon particles.

Composite carbon fibers

A negative electrode material for a lithium ion battery, in which a fine particle (A) containing an element selected from Si, Sn, Ge and In and a carbon particle (B) obtained by heat-treating a petroleum-based coke and/or a coal-based coke at a temperature of 2,500&#xb0; C. or more are connected through a chemical bond such as urethane bond, urea bond, siloxane bond and ester bond. Also disclosed are a negative electrode sheet obtained by coating a current collector with a paste containing the negative electrode material, a binder and a solvent, and then drying and pressure-forming the paste; and a lithium ion battery incorporating the negative electrode sheet.

Negative electrode material for lithium battery

There is provided a method of molding which is capable of more highly precisely molding a molded article to be molded such as a lens than conventional technologies. A molded article such as a lens array and a mold for nanoimprinting is molded by repeating multiple times a transfer step including: a transformation step of bringing a light curable composition containing a compound having a polymerizable functional group and a polymerization initiator into contact with a transfer memberon which a transfer shape portion shaped equally to or reversely to an aspherical lens portionis formed to transform the light curable composition to the transfer shape of the transfer member; a curing step of irradiating at least a transformed portion of the transformed light curable composition with light by a light irradiation unitto cure the light curable composition; and a separation step of separating the cured light curable composition and the transfer member.

Method of molding

An object of the present invention is to provide a reactive urethane compound having superior curability, adhesion to substrates, transparency, molecular flexibility, and mechanical properties, a curable composition containing the compound, and a cured material formed from the composition. An ethylenically-unsaturated-group containing reactive urethane compound of the present invention is represented by formula (I): wherein Rand Rare each independently a hydrogen atom or an alkylene group; Ris a hydrogen atom, a alkyl group, or an aryl group; Ris a single bond or an alkylene group; Ris a hydrogen atom or a methyl group; Ris an oxygen atom, a sulfur atom, or an imino group; n is 2 to 12; m is 1 to 300; and X is an aliphatic, aromatic or heterocyclic compound residue.

Reactive urethane compound having ether bond, curable composition, and cured material

The present invention is directed to a hardening composition comprising silica fine particles (a), a (meth)acrylate (b) having two or more ethylenically unsaturated groups and being free from cyclic structure, a (meth)acrylate (c) having an ethylenically unsaturated group and having an alicyclic structure, a polymerization initiator (d) and black inorganic fine particles (e), wherein the silica fine particles (a) are surface-treated with a silane compound (f) represented by the following general formula (1) and a silane compound (g) represented by the following general formula (2):  

Hardening composition and hardened product thereof

Provided are a silica-coated mixed crystal oxide particle which has high dispersibility, excellent visible light transparency and superior ultraviolet-shielding capability and which is sufficiently reduced in the photocatalytic activity; an economical production process thereof; and an ultraviolet-shielding cosmetic material containing the silica-coated mixed crystal oxide particle, which is particularly excellent in the visible light transparency. The surface of a mixed crystal oxide particle having a BET specific surface area of 10 to 200 m/g and containing primary particles in a mixed crystal is covered with a dense and thin film silica.

Silica-coated mixed crystal oxide particle, production process thereof and cosmetic material using the same

To provide a cosmetic composition having excellent ultraviolet protection against both UVB and UVA, causing neither unpleasant whitening to the applied skin nor skin irritation, and ensuring good feeling on use and high safety and high stability without causing decomposition of the ingredients blended in the cosmetic material, such as organic ultraviolet absorber. A cosmetic composition obtained by using fine particulate titanium oxide and fine particulate zinc oxide each surface-treated with silica, alumina or alumina/silica and having a primary particle size of 0.01 to 0.2 &#x3bc;m in combination and blending titanium oxide and zinc oxide at a mass ratio of 1:4 to 2:3, wherein SPF is maintained as compared with the case where the mass ratio of titanium oxide to zinc oxide is 1:0, and when applied to a thickness of 10 &#x3bc;m, the whiteness W value measured using the CIE color specification system is 20 or less.

Cosmetic composition

Growing community of inventors

Tokyo, Japan

Nobuaki Ishii