Nisshinbo Industries, Inc.

Tatsuya Maruo

Takaya Sato

Gen Masuda

Kimiyo Hata

Hiroshi Yoshida

Ryutaro Nozu

Shoko Marukane

Electrical storage devices having excellent low-temperature properties can be obtained by using a quaternary salt (or ionic liquid) of general formula (1) below as an electrolyte salt for electrical storage devices or a liquid electrolyte for electrical storage devices. In formula (1), Rto Rare each independently an alkyl group of 1 to 5 carbons or an alkoxyalkyl group of the formula R'&#x2014;O&#x2014;(CH)&#x2014;, with the proviso that at least one group from among Rto Ris the above alkoxyalkyl group. X is a nitrogen or phosphorus atom, and Y is a monovalent anion.

Ionic liquids, electrolyte salts for electrical storage devices, liquid electrolytes for electrical storage devices, electrical double-layer capacitors, and secondary batteries

Ionic liquids, electrolyte salts for storage device, electrolytic solution for storage device, electric double layer capacitor, and secondary battery

Secondary cells and electrical double-layer capacitors of excellent charge-discharge efficiency, stability and low-temperature properties can be obtained using nonaqueous electrolytes which contain an ionic liquid that has general formula (1) below and is liquid at not higher than 50&#xb0; C. and an ion-conductive polymer.  In formula (1), Rto Rare each independently an alkyl group of 1 to 5 carbons or an alkoxyalkyl group of the formula R'&#x2014;O&#x2014;(CH)&#x2014; (R&#x2032; being methyl or ethyl, and the letter n being an integer from 1 to 4), and any two from among R, R, Rand Rmay together form a ring, with the proviso that at least one of Rto Ris an alkoxyalkyl group of the above formula. X is a nitrogen atom or a phosphorus atom, and Y is a monovalent anion.

Nonaqueous electrolyte, electrical double-layer capacitors, and nonaqueous electrolyte secondary cells

A polymer gel electrolyte includes an electrolyte solution composed of a plasticizer with at least two carbonate structures on the molecule and an electrolyte salt, in combination with a matrix polymer. Secondary batteries made with the polymer gel electrolyte can operate at a high capacitance and a high current, have a broad service temperature range and a high level of safety, and are thus particularly well-suited for use in such applications as lithium secondary cells and lithium ion secondary cells. Electrical double-layer capacitors made with the polymer gel electrolyte have a high output voltage, a large output current, a broad service temperature range and excellent safety.

Polymer gel electrolyte, secondary cell, and electrical double-layer capacitor

Polymer gel electrolyte and secondary cell

A polymer battery which includes a cell assembly having a positive electrode, a negative electrode, and a separator composed primarily of a fluoropolymer is manufactured by impregnating the cell assembly with an electrolyte composition containing (A) an ion-conductive salt, (B) a solvent in which the ion-conductive salt is soluble and (C) a compound having at least two reactive double bonds per molecule, then reacting the component C compound to form a three-dimensional network structure. The polymer battery has a high safety, a good thermal cycling resistance and robust characteristics even when held at an elevated temperature, making it particularly suitable for use as a lithium secondary cell or a lithium ion secondary cell.

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Chiba, Japan

Tatsuya Maruo