| 摘要 |
A task of the present invention is to provide a non-aqueous electrolyte secondary battery which exhibits small initial irreversible capacity and high initial efficiency as well as excellent high-temperature cycle characteristics without sacrificing the yield of the battery. The non-aqueous electrolytic solution of the present invention is a non-aqueous electrolytic solution for use in a non-aqueous electrolyte secondary battery which comprises a positive electrode capable of having occluded therein and releasing metal ions, a negative electrode capable of having occluded therein and releasing metal ions, and a non-aqueous electrolytic solution comprising a non-aqueous solvent and an electrolyte dissolved in the non-aqueous solvent, wherein the non-aqueous electrolytic solution contains a compound represented by the general formula (1) in an amount of 0.01 to 4.5% by mass, based on the mass of the non-aqueous electrolytic solution:;;wherein, in the general formula (1), n represents an integer of 1 to 4, and R1 to R3 represent predetermined groups. |
| 主权项 |
1. A non-aqueous electrolytic solution, comprising:
a non-aqueous solvent, an electrolyte dissolved in the non-aqueous solvent, and a compound represented by formula (1) below in an amount of 0.01 to 4.5% by mass, based on a mass of the non-aqueous electrolytic solution, wherein, when the non-aqueous electrolytic solution comprises propylene carbonate, the non-aqueous electrolytic solution comprises ethylene carbonate and propylene carbonate, and satisfies at least one of the requirements that (A) a volume ratio of the ethylene carbonate and the propylene carbonate be in a range of 99:1 to 40:60, or that (B) a content of the propylene carbonate in the non-aqueous solvent be 10% by volume or less:wherein, in the formula (1), n represents an integer of 1 to 4; each of R1 and R2 independently represents hydrogen, fluorine, or a hydrocarbon group having 1 to 5 carbon atoms and optionally being substituted with fluorine, wherein when n is 2 or more, a plurality of R1's are the same or different and a plurality of R2's are the same or different, and wherein R1 and R2 are optionally bonded together to form a ring; and R3 represents a carbonyl group, a sulfinyl group, a sulfonyl group, or a group represented by formula (2):wherein, in the formula (2), R4 represents fluorine or a hydrocarbon group having 1 to 10 carbon atoms and optionally being substituted with fluorine. |
