Showa Denko Materials Co., Ltd.

Lg Energy Solution, Ltd.

Kaoru Konno

Kumpei Yamada

Ryuichiro Fukuta

Eisuke Haba

Hiroki Mikuni

Hiroo Nishiyama

Kouichi Takei

One aspect of the present invention provides an electrolytic solution comprising a compound represented by the following formula (1), wherein a content of the compound is 10% by mass or less based on the total amount of the electrolytic solution, wherein Rto Reach independently represent an alkyl group or a fluorine atom, Rrepresents an alkylene group, and Rrepresents an organic group containing a nitrogen atom.

Electrolytic solution and electrochemical device

One aspect of the present invention provides an electrolytic solution comprising a compound represented by the following formula (1): wherein Rto Reach independently represent an alkyl group or a fluorine atom, Rrepresents an alkylene group, and Rrepresents an organic group containing a sulfur atom.

The present invention provides, as one aspect, an electrolytic solution comprising a compound represented by the following formula (1) and a compound represented by the following formula (2): wherein Rto Reach independently represent an alkyl group or a fluorine atom, Rrepresents an alkylene group, and Rrepresents an organic group comprising a sulfur atom and not comprising a nitrogen atom; and wherein Rto Reach independently represent an alkyl group or a fluorine atom, Rrepresents an alkylene group, and Rrepresents an organic group comprising a nitrogen atom and not comprising a sulfur atom.

A lithium ion secondary battery includes: a cathode; an anode: a separator; and an electrolytic solution containing lithium hexafluorophosphate (LiPF) as a lithium salt, wherein the cathode includes a current collector and a cathode mixture formed on the current collector, and wherein the cathode mixture contains an aluminum oxide, a part or an entirety of a surface of the aluminum oxide being coated with carbon.

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Tokyo, Japan

Kaoru Konno