Toray Industries, Inc.

Panasonic Corporation

Yoshihide Hirai

Eiichiro Tamaki

Manabu Kawasaki

Yasuaki Tanimoto

Chie Hirai

Koki Miyazono

Hanxiao Yang

Keisuke Tsunetsugu

Hiroto Nakama

Yukako Akeyama

A graphene/organic solvent dispersion liquid is in a stably dispersed state and also unlikely to cause electrolysis of water. A graphene/organic solvent dispersion liquid is also provided including graphene dispersed in an organic solvent and having a value of (W2&#x2212;W1)/G in the range of 0.005 or more and 0.05 or less, wherein W1 and W2 are the water fractions measured at 130&#xb0; C. and 250&#xb0; C., respectively, by the Karl Fischer's method and G is the solid fraction of the graphene.

Graphene/organic solvent dispersion and method for producing same, and method for producing lithium-ion battery electrode

A graphene material has a specific form that has a high dispersibility and can maintain a high electric conductivity and ion conductivity when used as material for electrode manufacturing. A graphene dispersion liquid is provided including graphene dispersed in an organic solvent and meeting both 0.5 &#x3bc;m&#x2264;S&#x2264;15 &#x3bc;m and 1.0&#x2264;D/S&#x2264;3.0 wherein D is the median diameter (&#x3bc;m) of the graphene measured by the laser diffraction/scattering type particle size distribution measurement method and S is the average size (&#x3bc;m) in the planar direction of the graphene calculated from the arithmetic mean of the longest diameter and shortest diameter of the graphene observed by a laser microscope.

Graphene dispersion, process for producing same, process for producing particles of graphene/active material composite, and process for producing electrode paste

A vacuum heat insulator according to the present invention includes a core molded to be plate-shaped with the use of a binding agent. The vacuum heat insulator assumes any one of the following configurations. A) The core is formed by curing a fiber aggregate by means of a binding agent. The fibers have an average fiber diameter of at least 0.1 &#x3bc;m but at most 10 &#x3bc;m, and voids defined by fibers have a void diameter of at most 40 &#x3bc;m. The core has a percentage of the voids of at least 80%. B) The binding agent is varied in concentration in a through-thickness direction of the core. C) A cured layer solidified by the binding agent is formed on at least one side surface of the core. D) The core contains fibers having a length of at most 100 &#x3bc;m. The fibers are oriented perpendicular to a direction of heat transmission. Such vacuum heat insulator is excellent in adiabatic property. Refrigerators, to which such a vacuum heat insulator is applied, are made small in size, or have a large inner volume, or contribute to energy saving.

Vacuum heat insulator, method of manufacturing the same, and refrigerator using the same

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Otsu, Japan

Yoshihide Hirai