| 摘要 |
<p>A secondary battery having a nonaqueous electrolyte solution which is equipped with a negative electrode containing a carbon material being capable of occluding and emitting lithium, a positive electrode, a nonaqueous electrolyte solution comprising a solute and an organic solvent, and a separator, characterized in that said organic solvent comprises at least one compound selected from compounds represented by general formula (I) and those by general formula (II), wherein ζ represents a phenyl group optionally having an alkyl group, R represents a hydrogen atom, an alkyl group having one to four carbon atoms, and a phenyl group optionally having an alkyl group. The secondary battery of the invention having a nonaqueous electrolyte solution shows an outstandingly reduced decomposition of an electrolyte solution, and has a good cycle characteristic and a high energy density.</p> |
