| abstract |
(57) [Problem] To provide a non-aqueous electrolyte secondary battery having high capacity and excellent storage stability. SOLUTION: In a non-aqueous electrolyte secondary battery comprising a negative electrode 1, a positive electrode 2 capable of doping and undoping lithium, and a non-aqueous electrolytic solution in which an electrolyte is dissolved in a non-aqueous solvent, The non-aqueous electrolyte contains at least one or more methoxybenzene-based compounds and has impurities of 5 to 7%. It is contained at a concentration of 000 ppm. |