Sekisui Chemical Co., Ltd.

Oita University

Hiroshi Yoshitani

Akira Nakasuga

Shoji Nozato

Akihiko Fujiwara

Takeharu Morita

Masahiro Toyoda

Hiroshi Hiraike

Takuya Wada

Motokuni Ichitani

Shotaro Kobaru

Nobuhiro Goto

Shouji Nozato

Shunji Hyodo

Yasushi Uematsu

Toru Takahashi

There is provided an active material-exfoliated graphite composite that allows a lithium ion secondary battery to be obtained in which the initial capacity is large and deterioration in charge and discharge cycle characteristics is less likely to occur, when used for a negative electrode material for lithium ion secondary batteries. An active material-exfoliated graphite composite comprising: partially exfoliated graphite having a structure in which graphite is partially exfoliated; and an active material that is in the form of particles capable of intercalating and deintercalating lithium ions by composite formation with the partially exfoliated graphite, or particles capable of adsorbing and desorbing lithium ions by composite formation with the partially exfoliated graphite, wherein the active material has an average particle diameter of 1 &#x3bc;m or more and 100 &#x3bc;m or less.

Active material-exfoliated graphite composite, negative electrode material for lithium ion secondary battery, and lithium ion secondary battery

There is provided a capacitor electrode material that does not require the use of a conductive aid and can increase the capacitance of an electric double layer capacitor. A capacitor electrode material comprising resin-remaining partially exfoliated graphite obtained by pyrolyzing a resin in a composition in which the resin is fixed to graphite or primary exfoliated graphite by grafting or adsorption, the resin-remaining partially exfoliated graphite having a structure in which graphite is partially exfoliated, with part of the resin remaining; and a binder resin.

Capacitor electrode material, method for producing same, and electric double layer capacitor

There is provided a method for producing relatively easily handleable exfoliated graphite by exfoliating graphite without complicated steps, and exfoliated graphite obtained by the method. A method for producing exfoliated graphite, comprising steps of preparing a composition which comprises graphite or primary exfoliated graphite and a polymer and in which the polymer is fixed to the graphite or primary exfoliated graphite; and pyrolyzing the polymer contained in the composition to exfoliate the graphite or primary exfoliated graphite and remove the polymer by pyrolysis.

Method for producing flake graphite, and flake graphite

There is provided an exfoliated graphite-resin composite material that has high dispersibility in resins and the like and is easily handled. An exfoliated graphite-resin composite material in which exfoliated graphite and a resin form a composite. When an amount of methylene blue adsorbed per g of the exfoliated graphite-resin composite material (&#x3bc;mol/g) is y, the amount of methylene blue adsorbed as measured based on a difference between an absorbance of a methanol solution of methylene blue at a concentration of 10 mg/L and an absorbance of a supernatant liquid obtained by introducing the exfoliated graphite-resin composite material into the methanol solution of methylene blue and performing centrifugation, and a BET specific surface area (m/g) of the exfoliated graphite-resin composite material is x, a ratio y/x is 0.15 or more, and the BET specific surface area is 25 m/g or more.

Exfoliated graphite-resin composite material and method for producing the same

Provided is a production method which can attain exfoliating treatment of graphite and a process of grafting a polymer onto exfoliated graphite simultaneously and thus makes it possible to easily obtain an exfoliated graphite-polymer composite material in a short time. A method for producing an exfoliated graphite-polymer composite material includes a step of mixing graphite or primary exfoliated graphite, a depolymerizable monomer of which the polymer is decomposed by heating to generate radicals and also to form a monomer or an oligomer, or the polymer A of the monomer, or a polymer B which forms radicals at a temperature close to its decomposition temperature to obtain a mixture; and a heating step of putting the mixture in a non-open container to heat the mixture to a first temperature range from the ceiling temperature or higher to the onset decomposition temperature or lower, or to a temperature higher than the first temperature range.

Method for producing exfoliated graphite-polymer composite material

There is provided a method for producing a negative electrode material for lithium ion secondary batteries that is easily produced and is less likely to cause deterioration in charge and discharge cycle characteristics. A method for producing a negative electrode material for lithium ion secondary batteries, comprises steps of heating a raw material composition comprising resin-retained partially exfoliated graphite having a structure in which graphene is partially exfoliated and Si particles to dope the partially exfoliated graphite with the Si particles, the partially exfoliated graphite being obtained by pyrolyzing a resin in a composition in which the resin is fixed to graphite or primary exfoliated graphite, thereby exfoliating the graphite or primary exfoliated graphite while allowing part of the above resin to remain; providing a composition comprising the above partially exfoliated graphite doped with the Si particles, a binder resin, and a solvent; and shaping the above composition.

Fine particle-exfoliated graphite composite, negative electrode material for lithium ion secondary battery, and methods for producing the same, and lithium ion secondary battery

It is an object of the present invention to provide a spacer for a liquid crystal display and a method of producing a spacer for a liquid crystal display, which improve light leakage around a spacer for a liquid crystal display in cutting off light of a liquid crystal display and in vibrating a liquid crystal display and in addition have a good dry spraying property. The present invention relates to a spacer for a liquid crystal display, which comprises a base particle and a polymer coating the surface of said base particle, a contact angle Aof water on the spacer, measured at 25&#xb0; C. when said spacer is annealed at a temperature of an annealing temperature Tor higher in fabricating a liquid crystal display for 1 hour or more and then cooled, and a contact angle B of water on the spacer, measured at 25&#xb0; C. without annealing the spacer, satisfying the relationship of the following equation (1):1&#x2212;&#x2267;1&#xb0;.&#x2003;&#x2003;(1)

Spacer for liquid crystal display and process for producing the same

It is an object of the present invention to provide a polymerizable composition and a cured resin composition, linear expansion coefficients of which are significantly improved without impairment of the excellent properties such as heat resistance, mechanical strength and the like of norbornene-based resins. The present invention is a polymerizable composition, which comprises a polymerizable substance containing a norbornene-based monomer or oligomer as a main component, a metathesis polymerization catalyst and silica powder, the weight content of the silica powder being larger than the weight content of the polymerizable substance.

Growing community of inventors

Osaka, Japan

Hiroshi Yoshitani