Daikin Industries, Ltd.

Tomo Shimada

Shinichi Kinoshita

Hiroyuki Arima

Akinori Tani

Michiaki Okada

Mayuko Taeda

Shigeaki Yamazaki

Hideo Sakata

Shinya Takano

Mayuko Takano

Toshirou Miura

Yoshiko Kuwajima

An electrolyte solution containing a compound represented by the following formula (1): wherein Rf is a C1-C8 fluorinated alkyl group, and vinylene carbonate. Also disclosed is an electrochemical device including the electrolyte solution, a lithium ion secondary battery including the electrolyte solution and a module including the lithium ion secondary battery.

Fluorinated unsaturated cyclic carbonate and process for producing the same

An unsaturated cyclic carbonate containing a fluorinated alkyl group represented by the following formula: wherein Rf is a C1-C8 fluorinated alkyl group.

Fluorinated unsaturated cyclic carbonate and process for producing same

Provided is an electrolyte solution for secondary batteries that are less likely to generate gas and excellent in high-temperature storage characteristics; an electrochemical device using the electrolyte solution; and a module using the electrochemical device. The electrolyte solution contains a solvent and an electrolyte salt, the solvent containing a fluorine-containing acyclic carbonate represented by the formula (1) and a fluorine-containing maleic anhydride represented by the formula (2). The electrolyte solution contains not less than 0.001 mass % but less than 90 vol % of the fluorine-containing acyclic carbonate, and the electrolyte solution contains 0.001 to 20 mass % of the fluorine-containing maleic anhydride.

Electrolyte, electrochemical device, secondary cell, and module

The present invention aims to provide an electrolyte solution that suppresses generation of gas. The electrolyte solution of the present invention includes a non-aqueous solvent (I) containing one or both of a fluorinated cyclic carbonate and a fluorinated acyclic carbonate; an electrolyte salt (II); and a compound (III) represented by the following formula (1): wherein Ris a C1-C20 linear or branched alkenyl or alkyl group or a C3-C20 alkyl group having a cyclic structure; m is 0 or 1; Ris a C1-C20 linear or branched alkylene group or a C3-C20 alkylene group having a cyclic structure, Rand Reach may have an oxygen atom between carbon atoms if Rand Reach have two or more carbon atoms, but the oxygen atom is not adjacent to another oxygen atom.

Electrolytic solution, electrochemical device, lithium-ion secondary cell, and module

The present invention provides an electrolytic solution capable of restraining gas generation. The present invention relates to an electrolytic solution containing a nonaqueous solvent (I), an electrolyte salt (II), and a compound (III) represented by the following formula (1): wherein Rf represents a C1-C20 linear or branched fluorinated alkyl group or a C3-C20 fluorinated alkyl group having a cyclic structure, R represents a C1-C20 linear or branched alkylene group or a C3-C20 alkylene group having a cyclic structure, hydrogen atoms in R may be partially or fully replaced by fluorine atoms, Rf and R may each contain an oxygen atom between carbon atoms when having a carbon number of 2 or more as long as oxygen atoms are not adjacent to each other.

Electrolyte solution, electrochemical device, lithium ion secondary battery, and module

Provided is an electrolyte solution for secondary batteries that are less likely to generate gas and excellent in high-temperature storage characteristics; an electrochemical device using the electrolyte solution; and a module using the electrochemical device. The electrolyte solution contains a solvent and an electrolyte salt, the solvent containing a fluorine-containing acyclic carbonate represented by the formula (1) and a fluorine-containing succinic anhydride represented by the formula (2). The electrolyte solution contains not less than 0.001 mass % but less than 90 vol % of the fluorine-containing acyclic carbonate, and the electrolyte solution contains 0.001 to 20 mass % of the fluorine-containing succinic anhydride.

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Osaka, Japan

Tomo Shimada