| abstract |
(57) [Abstract] [Purpose] To provide a highly reliable organic electrolyte secondary battery. In a battery including a negative electrode made of a carbon material capable of inserting and extracting lithium, a positive electrode, and an organic electrolytic solution containing a solvent and a solute, a mixture of dioxide thiophene and acyclic sulfone is used as the solvent. As a result, it is possible to effectively suppress the decrease in discharge capacity that accompanies the progress of the charge / discharge cycle, which is a problem of this type of battery. |