Nippon Shokubai Co., Ltd.

Morita Chemical Industries Co., Ltd.

Hiroyuki Mizuno

Hiromoto Katsuyama

Yukihiro Fukata

Takeo Kawase

Yasunori Okumura

Takayuki Kobatake

Naohiko Itayama

Kazuhisa Hirata

Yuichi Sato

Izuho Okada

Motohiro Arakawa

Masayuki Okajima

Shin-ya Shibata

Chie Onoda

Yasuhiro Higuchi

Hirotsugu Shimizu

Takahiro Yamauchi

Ryo Watabe

Yusuke Oyama

Kenji Yamada

Miwako Tominaga

An electrolyte composition includes: a sulfonylimide compound represented by the following general formula (1) as an electrolyte salt; and an amidosulfuric acid component.LiN(XSO)(XSO)  (1)

Electrolyte composition, solvent composition, non-aqueous electrolyte, and use thereof

In the present invention, a bis (fluorosulfonyl) imide metal salt is an alkali metal salt of bis (fluorosulfonyl) imide or an alkaline earth metal salt of bis (fluorosulfonyl) imide. The bis (fluorosulfonyl) imide metal salt has an average particle diameter of not less than 0.1 mm, or has an average moisture absorption rate of not more than 2.5 mass ppm/cm&#xb7;min when sealed in a PE bag having a thickness of 80 &#x3bc;m and left for 30 minutes at 23&#xb0; C. and 65% humidity.

Bis(fluorosulfonyl) imide metal salt and method for preparing same

The objective of the present invention is to provide an electrolyte solution of which electrolyte salt concentration is high and by which cycle characteristics hardly deteriorate and battery lifetime can be extended, and a lithium ion secondary battery which contains the above electrolyte solution. The electrolyte solution of the present invention comprises an electrolyte salt and a solvent, wherein a concentration of the electrolyte salt is more than 1.1 mol/L, the electrolyte salt contains a compound represented by the following formula (1): (XSO) (FSO)NLi (1) (wherein X is a fluorine atom, a Calkyl group or a Cfluoroalkyl group), and the solvent contains a cyclic carbonate.

Electrolyte solution and lithium ion secondary battery provided with same

Provided is a method the enables easy production of bis(fluorosulfonyl)imide suitable for a non-aqueous electrolytic solution for a lithium ion secondary battery, etc. The method for producing a bis(fluorosulfonyl)imide alkali metal salt according to the present invention comprises reacting bis(fluorosulfonyl)imide with an alkali metal compound in a reaction solution containing an organic solvent, wherein the organic solvent includes at least one organic solvent (A) selected from the group consisting of carbonate solvents, cyclic ether solvents, linear ether solvents having two or more oxygen atoms in the molecule, cyclic ester solvents, sulfolane solvents, N,N-dimethyl formamide, dimethyl sulfoxide, and N-methyl oxazolidinone.

Method for producing bis(fluorosulfonyl)imide alkali metal salt and method for producing non aqueous electrolytic solution

A non-aqueous electrolytic solution capable of suppressing reduction in capacity, cycle characteristics, and/or rate characteristics even when used under high voltage conditions after being stored under high temperature conditions (e.g., 60&#xb0; C. or higher); and a lithium ion secondary battery using these non-aqueous electrolytic solutions are provided. The non-aqueous electrolytic solution of the present invention comprise an anion represented by the following general formula (1), a lithium cation, and a compound represented by the following general formula (2A) and/or an acid anhydride having an aromatic ring and at least one structure represented by &#x2014;C(&#x2550;O)&#x2014;O&#x2014;C(&#x2550;O)&#x2014; in a molecule, wherein a concentration of the anion represented by the general formula (1) is 0.1 mol/L or more.

Non-aqueous electrolytic solution and lithium ion secondary battery comprising same

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Osaka, Japan

Hiroyuki Mizuno