| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery, in which reduction in high output capacity/low output capacity is suppressed even if an electrode formed of a powder molding is thick, by limiting a relationship between conductivity and viscosity of a nonaqueous electrolytic solution in a nonaqueous secondary battery. SOLUTION: In a secondary battery provided with a positive electrode, a negative electrode, and a nonaqueous electrolytic solution containing LiPF6 as electrolyte, a ratio (p)=σ/η of the conductivity σ (10<-3> S/cm) to the viscosity η(cps) of the nonaqueous electrolytic solution is 1 or more. A mixture of a high dielectric constant solvent and a low viscosity solvent is desirable for a solvent constituent of the nonaqueous electrolytic solution. A combination of cyclic carbonate and chain carbonate is especially suitable, as it increases a high output capacity. |
