ELECTROLYTIC SOLUTION FOR CHARGEABLE DEVICE, ELECTROLYTIC SOLUTION FOR LITHIUM ION SECONDARY BATTERY, AND SECONDARY BATTERY

It is an object to provide, as a nonaqueous electrolyte solution using a solvent comprising a specific compound such as a polyethylene glycol dialkyl ether, an electrolyte solution for a chargeable device and an electrolyte solution for a lithium ion secondary battery exhibiting excellent cycle characteristics, and a secondary battery using the electrolyte solution. [0002] An electrolyte solution for a chargeable device, which comprises a fluorinated lithium salt and a solvent comprising a specific compound such as a polyethylene glycol dialkyl ether, and as an optional component, a hydroxy group-containing organic compound, wherein the amount of the hydroxy group-containing organic compound is at most 100 mg per 1 kg of the specific compound. Particularly, an electrolyte solution for a lithium secondary battery. Further, a lithium secondary battery using the electrolyte solution for a lithium secondary battery.