| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary power supply which is higher in capacity density and is superior in quick charge and discharge cycle reliability. SOLUTION: The secondary power supply comprises organic solvent system electrolytic solution including lithium salt and quarternary onium salt, a positive electrode including active carbon, and a negative electrode including lithium titanate. The quarternary onium salt includes one or more kinds selected from a group comprising a quarternary onium ion (C2H5)3(CH3)N+ and (C2H5)4P+, and one or more kinds selected from a group comprising counter anion PF6-, BF4-, ClO4-, N(SO2CF3)2- or the like. |
