| 摘要 |
A lithium-ion secondary cell provided with: a negative electrode containing a negative-electrode active substance containing at least one carbon selected from the group consisting of natural graphite, synthetic graphite, non-graphitizable carbon, and graphitizable carbon; and an electrolyte containing the cyclic sulfonic acid ester expressed in formula (1) (R1 and R2 are each independently a hydrogen, C1-5 alkyl group, halogen, or amino; R1 and R2 cannot both be hydrogens; and R3 represents a linking group selected from the group consisting of a C1-5 alkylene, carbonyl, sulfonyl, C1-6 fluoroalkylene, and a C2-6 bivalent group in which an alkylene unit or fluoroalkylene unit is linked via an ether). |
