Taiyo Yuden Co., Ltd.

Clubcreate Co., Ltd.

Takeo Tsuzuki

Takatoshi Nagase

Koji Kano

Takuo Kodaira

Hidenori Somei

Daizo Yokoyama

Aya Suto

An electrolyte solution for electrochemical device contains: an electrolyte solution comprising a cyclic carbonate solvent containing 1.0 mol/L to 1.6 mol/L of LiPFas an electrolyte; an oxalate complex salt of lithium whose additive quantity relative to the electrolyte solution accounts for 1.0 percent by weight to 3.0 percent by weight; and a straight-chain carbonate whose additive quantity relative to the electrolyte solution accounts for 1.0 percent by weight to 9.0 percent by weight.

Electrolyte solution for electrochemical device, and electrochemical device

A lithium ion capacitor has an electrolytic solution that contains: 100 parts by volume of a solvent containing 20 to 50 parts by volume of propylene carbonate, 10 to 35 parts by volume of dimethyl carbonate, and 15 to 70 parts by volume of ethyl methyl carbonate; and lithium bis(fluorosulfonyl)imide, as an electrolyte. The lithium ion capacitor can maintain its initial high capacitance and low internal resistance, while also undergoing minimal characteristics changes in a low-temperature environment, even after exposure to a high-temperature, high-voltage environment.

Lithium ion capacitor

A lithium ion capacitor has an electrolytic solution that contains: an electrolyte which is a mixture of LiFSI and LiBF, where the mol ratio of LiFSI to LiBFis in a range of 90/10 to 30/70; a solvent that contains at least one type of cyclic or chained carbonate compound; and a film-forming agent; wherein the concentration of electrolyte in the electrolytic solution is in a range of 1.2 to 1.8 mol/L. The lithium ion capacitor can maintain its initial high capacitance and low internal resistance, while also undergoing minimal characteristics changes after exposure to a high-temperature, high-voltage environment.

An electric double-layer capacitor contains an electrolytic solution, wherein the electrolytic solution comprises 1.2 to 1.8 mol/L of spirobipyrrolidinium tetrafluoroborate as electrolyte as well as solvent, where the solvent contains 50 to 60 percent by volume of propylene carbonate, 30 to 36 percent by volume of dimethyl carbonate, and 4 to 20 percent by volume of ethyl methyl carbonate. The electric double-layer capacitor can maintain its initial high capacitance and low internal resistance, while undergoing smaller characteristic changes after being exposed to low-temperature environments, high-voltage environments or high-temperature environments.

Electric double-layer capacitor

In an embodiment, an electric storage deviceincludes: an electric storage elementhaving a positive electrode and a negative electrode; a non-aqueous electrolytic solution constituted by a non-aqueous solvent primarily containing cyclic ester and cyclic carbonate ester, in which an electrolyte containing lithium salt is dissolved and to which a sulfonate ester derivative whose reduction potential is higher than that of the cyclic ester and cyclic carbonate ester is added; and an outer containerthat stores the electric storage elementand non-aqueous electrolytic solution. The electric storage device can offer both good low-temperature characteristics and good high-temperature reliability.

Electric storage device

A training apparatus includes: a rotation center to be substantially matched with a center axis of a body of a user when the user is in standing posture; pelvis-fixing means capable of moving toward and away from the rotation center; and rotary mechanism support means for supporting the pelvis-fixing means so that the pelvis-fixing means is rotatable about the rotation center and capable of being aligned with a height position of an ilium of the user by causing the pelvis-fixing means to move up and down in parallel with the rotation center. The pelvis-fixing means is arranged so as to be pressed against the height position of the ilium of the user, from front or back side, or is arranged on each of front and back sides of the user so as to sandwich the height position of the ilium of the user from the front and back sides.

Training apparatus

A non-aqueous electrolyte solution for an electric double-layer capacitor includes a non-aqueous solvent in which electrolyte salt is dissolved. The non-aqueous electrolyte solution is characterized in that the non-aqueous solvent is a mixed solvent of chained sulfone and cyclic lactone compound. The non-aqueous electrolyte solution can suppress increase in the resistance value of the electric storage element even in a low-temperature environment below 0&#xb0; C. and can also be used in a normal-temperature environment.

Non-aqueous electrolyte solution for electric double-layer capacitor

Provided is an optical information recording medium employing an In-Groove recording system, and having a preferable recording characteristic with a high modulation degree and low jitter characteristics. The medium is comprised of a circular-disk shaped substratehaving a through hole at a center portion thereof and a helical guide grooveon one surface thereof; a reflective layerformed on the guide grooveof the substrate; a recording layerformed on the reflective layerand composed of an organic material including a dye; a protection layerprovided on the recording layer; and a light-transmissive layerformed on the protection layer. The recording layerincludes an organic dye which is an azo metal complex compound having a structure represented by (Chemical formula 1) and a functional group represented by (Chemical formula 2).

Dye for optical information recording medium and optical information recording medium

An object of the present invention is to provide a way to reduce the internal resistance of a lithium ion capacitor without causing its capacity or withstand voltage to drop. The present invention provides a lithium ion capacitor having a positive electrode, a negative electrode, a separator, and an electrolyte solution, wherein the separator contains cellulose that has been given a treatment to create carbon-carbon double bonds.

Growing community of inventors

Takasaki, Japan

Takeo Tsuzuki