Sekisui Chemical Co., Ltd.

Kumamoto University

Hiroshima University

Other

Oita University

National University Corporation Kumamoto University

Shoji Nozato

Masanori Nakamura

Akira Nakasuga

Hiroshi Yoshitani

Akihiko Fujiwara

Ren-de Sun

Hiroji Fukui

Hirotaka Ihara

Makoto Takafuji

Hullathy Subban Ganapathy

Keigo Oowashi

Ryo Sekiya

Takeharu Haino

Masahiro Ishii

Yasuhiro Nakatani

Takeharu Morita

Hiroyuki Nakatani

Toshihiro Otsuki

Hiroshi Hiraike

Masahiro Toyoda

Naoki Sasagawa

Kouji Ashiba

Akihiro Niki

Hitoshi Kobayashi

Takahiko Sawada

Takuya Wada

Hiroki Masuda

Naoyuki Nagatani

Shotaro Kobaru

Shigekatsu Ohnishi

Hirotake Matsumoto

Yutaka Kuwahara

Hiromori Tsutsumi

Yasumasa Okada

Shunji Hyodo

Kazuaki Hiratani

Kazuhide Ueno

Rende Sun

Mikitoshi Suematsu

Rika Fukuda

Yasushi Uematsu

Ren-De Sun

Hiroki Noguchi

Provided is a sulfur-carbon material composite body which, when used for an electrode of a secondary battery, is unlikely to degrade cycle characteristics at the time of charging and discharging of the secondary battery. Disclosed is a sulfur-carbon material composite body including a first carbon material having a graphene layered structure; a spacer at least partially disposed between graphene layers of the first carbon material or at an end of the first carbon material; and sulfur or a sulfur-containing compound at least partially disposed between the graphene layers of the first carbon material or at the end of the first carbon material.

Sulfur-carbon material composite body, positive electrode material for lithium sulfur secondary batteries, and lithium sulfur secondary battery

A light-modulating material of which the light transmittance can be controlled over a wide region from visible light to infrared light by voltage application is provided. The light-modulating material comprises a graphene-like carbon material having an aspect ratio of 3 or more and 330 or less.

Light-modulating material, light-modulating film, and light-modulating laminate

The present invention provides a negative electrode active material for lithium ion batteries which has high adhesiveness and followability to a negative electrode active material in volume expansion and contraction during charging and discharging, excellent contact and adhesiveness to a conductive aid, a binder, and a current collector, and a high suppressing effect on decomposition of an electrolyte solution. Due to these features, the negative electrode active material for lithium ion batteries is capable of achieving excellent cycle characteristics and rate characteristics and high coulombic efficiency. The present invention also provides a negative electrode for lithium ion secondary batteries and a lithium ion secondary battery each including the negative electrode active material for lithium ion batteries, and a method for producing a negative electrode active material for lithium ion batteries. Provided is a negative electrode active material for lithium ion batteries, including: a negative electrode active material; and a coating layer containing an amorphous carbon on a surface of the negative electrode active material, the amorphous carbon constituting the coating layer having a ratio of a peak derived from a sp2 component to a peak derived from a sp3 component of 1 or higher as determined byC solid-state NMR, and a ratio of a peak derived from aromatic carbon having a bond with a hydroxy group to the peak derived from the sp2 component of 0.2 or lower.

Negative electrode active material for lithium ion battery

Provided is a gas barrier material having superior gas barrier properties. This gas barrier materialcomprises a matrix resin, and a carbon materialdisposed in the matrix resin, wherein the carbon materialcontains a partially exfoliated graphite having a structure in which graphite is partially exfoliated.

Gas barrier material and thermosetting resin composition

Provided is a new polycyclic aromatic hydrocarbon derivative. The polycyclic aromatic hydrocarbon derivative is a derivative of a polycyclic aromatic hydrocarbon having 6 or more aromatic rings and has a substituent represented by the following formula (1). (In the formula (1), Rand Rare carbon atoms of the aromatic rings in the polycyclic aromatic hydrocarbon, and Rto Rare carbon atoms of an aromatic ring or a heterocyclic ring in a group having the aromatic ring or the heterocyclic ring. n is 0 or 1, and m is the number of substituents.) [Chemical 1] 

Polycyclic aromatic hydrocarbon derivative, fluorescent material, phosphorescent material, and light-modulating material

Provided is a conductive paste which makes it possible to form a conductive layer having excellent conductivity even when spherical copper powder having a small particle diameter is used. Disclosed is a conductive paste containing a conductive filler and a binder resin. In this conductive paste, when a first coating film is prepared by coating a first paste containing 100 parts by weight of the binder resin and 20 parts by weight of the conductive filler on a first substrate at a coating amount of 100 g/mand drying and curing the binder resin, the first coating film has a light transmittance of 20% or more, and when a second coating film is prepared by coating a second paste containing the binder resin but not containing the conductive filler on a second substrate at a coating amount equivalent to a dry solid content of 55 g/mand drying and curing the binder resin, a film thickness t &#x3bc;m of the second coating film and a shrinkage ratio &#x3b1; % obtained by the following formula (1) satisfy a relationship of the following formula (2): &#x3b1;=(1&#x2212;(arc length of a surface of the second coating film after drying and curing)/(arc length of a second substrate after drying and curing))&#xd7;100 Formula (1) and &#x3b1;&#x2265;(5t+50)&#xd7;10Formula (2).

Conductive paste

A positive electrode active material for a lithium ion battery includes a coating layer comprising amorphous carbon on a surface of a positive electrode active material, wherein the amorphous carbon is derived from carbon contained in an oxazine resin, a ratio of a peak intensity of a G band to a peak intensity of a D band is 1.0 or greater when the amorphous carbon is measured by Raman spectroscopy, an average film thickness of the coating layer is 100 nm or less, and a coefficient of variation (CV value) of a film thickness of the coating layer is 10% or less.

Positive electrode active material for lithium ion battery

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

A carbon-coated vanadium dioxide particle includes a vanadium dioxide particle; and a coating layer containing amorphous carbon on a surface of the vanadium dioxide particle, the amorphous carbon being derived from carbon contained in an oxazine resin, and having a peak intensity ratio of a G band to a band of 1.5 or greater as determined from a Raman spectrum. The coating layer has an average thickness of 50 nm or less. The coating layer has a coefficient of variation (CV value) of thickness of 7% or less.

Carbon-coated vanadium dioxide particles

Provided is a carbonaceous material capable of enhancing the initial charge and discharge efficiency and the cycle characteristics of lithium ion secondary batteries. The carbonaceous material is used as an electrode material for a lithium ion secondary battery and has a volume resistivity of 0.7 &#x3a9;&#xb7;cm or less as measured at a pressure of 13 MPa in the form of a mixture of 5 wt % of the carbonaceous material and 95 wt % of lithium cobaltate.

Carbon material, carbon material-active material composite, electrode material for lithium-ion secondary battery, and lithium-ion secondary battery

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

A carbon-coated thermal conductive material includes a coating layer comprising amorphous carbon on a surface of a thermal conductive material, wherein the thermal conductive material comprises a metal oxide, a metal nitride, a metal material, or a carbon-based material having a thermal conductivity of 10 W/mK or greater, the amorphous carbon is derived from carbon contained in an oxazine resin, a ratio of a peak intensity of a G band to a peak intensity of a D band is 1.0 or greater when the amorphous carbon is measured by Raman spectroscopy, an average film thickness of the coating layer is 500 nm or less, and a coefficient of variation (CV value) of a film thickness of the coating layer is 15% or less.

Carbon-coated thermal conductive material

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

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

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Osaka, Japan

Shoji Nozato