| abstract |
In particular, it is an object to provide a non-aqueous electrolyte, a non-aqueous secondary battery, a cell pack, and a hybrid system capable of improving desired battery performance using acetonitrile. The non-aqueous electrolyte solution of this invention contains acetonitrile, a lithium salt, and cyclic acid anhydride, It is characterized by the above-mentioned. The non-aqueous secondary battery of the present invention is a non-aqueous secondary battery comprising a positive electrode having a positive electrode active material layer on one side or both sides of a current collector, a negative electrode having a negative electrode active material layer on one side or both sides of a current collector, and a non-aqueous electrolyte solution. The non-aqueous electrolyte solution contains acetonitrile and a lithium salt, and the non-aqueous secondary battery has a capacity retention rate calculated by dividing the 5C discharge capacity by the 1C discharge capacity after 4 hours storage test at 85 ° C. It is characterized by being 70% or more. Moreover, the said non-aqueous secondary battery is characterized in that the ion conductivity in 0 degreeC after 10-hour storage test at 85 degreeC is 10 mS / cm or more. |