| 摘要 |
A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode comprising a graphite as a negative electrode active material, and a nonaqueous electrolyte including at least a saturated cyclic carbonic ester and containing a cyclic carbonic ester having a carbon-carbon double bond such that, when a content of the cyclic carbonic ester having a carbon-carbon double bond is x (g), a content of the graphite in the negative electrode is B (g), a specific surface area of the graphite is A (m<SUP>2</SUP>/g), a size of the crystallite of the graphite in a direction of the c axis is Lc, and a size of the crystallite of the graphite in a direction of the a axis is La, a condition expressed by <?in-line-formulae description="In-line Formulae" end="lead"?>0.05x10<SUP>-2</SUP><=X/[AxBx2Lc/(2Lc+La)]<=3x10<SUP>-2 </SUP><?in-line-formulae description="In-line Formulae" end="tail"?> is satisfied. |
