| 摘要 |
PROBLEM TO BE SOLVED: To provide a compound device capable of performing charge and discharge stably while keeping a high output, and a nonaqueous electrolyte for such a compound device.SOLUTION: The compound device comprises: a first electrode plate group included in a first electrochemical device; a second electrode plate group included in a second electrochemical device which is higher in output than the first electrochemical device; a nonaqueous electrolyte in contact with both the electrode plate groups; and a case for housing them. The nonaqueous electrolyte comprises a solute, an additive agent which can be reduced at a potential of 0.8 V or higher with respect to lithium, ethylene carbonate, propylene carbonate, and a low-viscosity solvent in particular proportions (mass%). |
