| abstract |
PROBLEM TO BE SOLVED: To provide a non-aqueous electrolyte secondary battery using a non-aqueous solvent having a relatively high flash point and a relative dielectric constant of 25 or more as a main solvent and having good electric characteristics. A non-aqueous electrolyte secondary battery including at least a negative electrode containing a carbonaceous substance capable of inserting and extracting lithium, a positive electrode, and a non-aqueous electrolyte solution including a solute and a non-aqueous solvent. 90% by weight of one or more solvents selected from non-aqueous solvents having a relative dielectric constant of 25 or more. A non-aqueous electrolyte secondary battery comprising the above non-aqueous solvent, wherein the non-aqueous solvent has a flash point of 70 ° C. or higher, and one or more cyclic acid anhydrides are added to the non-aqueous solvent. |