| abstract |
Non-aqueous electrolyte capable of suppressing a decrease in battery capacity and swelling of a battery when a charge / discharge cycle is repeated and further suppressing an increase in battery thickness even when charged / discharged at a low temperature. A secondary battery is provided. In a non-aqueous electrolyte secondary battery 1 including a positive electrode 4, a negative electrode 3, and an electrolyte, the electrolyte includes a chain diol sulfonic acid, a cyclic sulfate ester derivative or a 1,3-propene sultone derivative, and a chain. And a sulfate ester compound. [Selection] Figure 1 |