Mitsubishi Chemical Corporation

Mu Ionic Solutions Corporation

Toyota Jidosha Kabushiki Kaisha

Takamichi Mitsui

Minoru Kotato

Takayuki Aoshima

Tsuyoshi Inoue

Eiji Nakazawa

Yoichi Oohashi

Shinichi Kinoshita

Takeshi Abe

Toshiyuki Kawai

A nonaqueous electrolyte solution, which contains a compound represented by the following general formula (A), and (1) at least one compound selected from the group consisting of a nitrile compound, an isocyanate compound, a difluorophosphate, a fluorosulfonate, a lithium bis(fluorosulfonyl)imide and a compound represented by the following general formula (B), or (2) a cyclic carbonate compound having a fluorine atom in an amount of 0.01% by mass to 50.0% by mass based on the total amount of the nonaqueous electrolyte solution. (In formula (A), Rto Rmay be mutually the same or different and represent optionally substituted organic groups having 1 to 20 carbon atoms.) (In formula (B), R, Rand Rrespectively and independently represent an alkyl group, alkenyl group or alkynyl group having 1 to 12 carbon atoms that may be substituted with a halogen atom, and n represents an integer of 0 to 6.

Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same

Disclosed herein is a nonaqueous electrolyte solution containing an electrolyte and a nonaqueous solvent, the nonaqueous electrolyte solution including a compound represented by formula (A) and: (1) at least one compound selected from a nitrile compound, an isocyanate compound, a difluorophosphate, a fluorosulfonate, a lithium bis(fluorosulfonyl)imide and a compound represented by the formula (B) below, or (2) a cyclic carbonate compound having a fluorine atom in an amount of 0.01% by mass to 50.0% by mass based on a total amount of the nonaqueous electrolyte solution. In formula (A), Rto Rrepresent optionally substituted organic groups having 1 to 20 carbon atoms, and in formula (B), R, Rand Rindependently represent an alkyl group, alkenyl group or alkynyl group having 1 to 12 carbon atoms that may be substituted with a halogen atom, and n represents an integer of 0 to 6. 

A non-aqueous secondary battery production method is provided. The method comprises constructing a preconditioning cell that comprises a positive electrode comprising a positive electrode active material, a preconditioning electrolyte solution comprising a supporting salt and a fluorine-containing non-ionic compound, and a preconditioning negative electrode (step S); of carrying out a preconditioning process by charging the preconditioning cell and allowing the fluorine-containing non-ionic compound to be decomposed at the positive electrode to form coatings on surfaces of the positive electrode active material (step S); and of constructing a non-aqueous secondary battery, using the coated positive electrode active material, a non-aqueous electrolyte solution different from the preconditioning electrolyte solution, and a negative electrode comprising a negative electrode active material (step S).

Method for producing a non-aqueous secondary battery

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Ibaraki, Japan

Takamichi Mitsui