| 摘要 |
A secondary battery incoludes a positive electrode, a negative electrode including an anode active material layer formed on at least one side of a negative electrode current collector, an electrolyte, and a laminate-film casing member containing therein the positive electrode, the negative electrode, and the electrolyte. The electrolyte contains a non-aqueous solvent which includes a cyclic carbonic ester in an amount of 80 to 100%, based on a total weight of the non-aqueous solvent. The also contains an electrolyte salt in a concentration of 0.8 to 1.8 mol/kg. The anode active material layer contains a polymer which includes repeating units derived from vinylidene fluoride. A peel strength between the anode active material layer and negative electrode current collector is 4 mN/mm or more as measured after immersing the anode active material layer into a solvent. |
